diff --git a/dist/osm-auth.cjs b/dist/osm-auth.cjs
index c6c88f4..df0bedd 100644
--- a/dist/osm-auth.cjs
+++ b/dist/osm-auth.cjs
@@ -1,8 +1,6 @@
-var __create = Object.create;
 var __defProp = Object.defineProperty;
 var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
 var __getOwnPropNames = Object.getOwnPropertyNames;
-var __getProtoOf = Object.getPrototypeOf;
 var __hasOwnProp = Object.prototype.hasOwnProperty;
 var __export = (target, all) => {
   for (var name in all)
@@ -16,23 +14,34 @@ var __copyProps = (to, from, except, desc) => {
   }
   return to;
 };
-var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
-  // If the importer is in node compatibility mode or this is not an ESM
-  // file that has been converted to a CommonJS file using a Babel-
-  // compatible transform (i.e. "__esModule" has not been set), then set
-  // "default" to the CommonJS "module.exports" for node compatibility.
-  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
-  mod
-));
 var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
 var osm_auth_exports = {};
 __export(osm_auth_exports, {
   osmAuth: () => osmAuth
 });
 module.exports = __toCommonJS(osm_auth_exports);
-var import_store = __toESM(require("store"), 1);
 function osmAuth(o) {
   var oauth = {};
+  var _store = null;
+  try {
+    _store = window.localStorage;
+  } catch (e) {
+    var _mock = /* @__PURE__ */ new Map();
+    _store = {
+      isMocked: true,
+      hasItem: (k) => _mock.has(k),
+      getItem: (k) => _mock.get(k),
+      setItem: (k, v) => _mock.set(k, v),
+      removeItem: (k) => _mock.delete(k),
+      clear: () => _mock.clear()
+    };
+  }
+  function token(k, v) {
+    if (arguments.length === 1)
+      return _store.getItem(o.url + k);
+    else if (arguments.length === 2)
+      return _store.setItem(o.url + k, v);
+  }
   oauth.authenticated = function() {
     return !!token("oauth2_access_token");
   };
@@ -117,8 +126,8 @@ function osmAuth(o) {
       code_challenge_method: pkce.code_challenge_method
     });
     if (o.singlepage) {
-      if (!import_store.default.enabled) {
-        var error = new Error("local storage unavailable, but require in singlepage mode");
+      if (_store.isMocked) {
+        var error = new Error("localStorage unavailable, but required in singlepage mode");
         error.status = "pkce-localstorage-unavailable";
         callback(error);
         return;
@@ -299,23 +308,6 @@ function osmAuth(o) {
     };
     return oauth.preauth(o);
   };
-  var token;
-  if (import_store.default.enabled) {
-    token = function(x, y) {
-      if (arguments.length === 1)
-        return import_store.default.get(o.url + x);
-      else if (arguments.length === 2)
-        return import_store.default.set(o.url + x, y);
-    };
-  } else {
-    var storage = {};
-    token = function(x, y) {
-      if (arguments.length === 1)
-        return storage[o.url + x];
-      else if (arguments.length === 2)
-        return storage[o.url + x] = y;
-    };
-  }
   oauth.options(o);
   return oauth;
 }
diff --git a/dist/osm-auth.cjs.map b/dist/osm-auth.cjs.map
index a235528..bc6e70f 100644
--- a/dist/osm-auth.cjs.map
+++ b/dist/osm-auth.cjs.map
@@ -1,7 +1,7 @@
 {
   "version": 3,
   "sources": ["../src/osm-auth.mjs"],
-  "sourcesContent": ["import store from 'store';\n\n\n/**\n * osmAuth\n * Easy authentication with OpenStreetMap over OAuth 2.0.\n * @module\n *\n * @param    o   `Object` containing options:\n * @param    o.scope          OAuth2 scopes requested (e.g. \"read_prefs write_api\")\n * @param    o.client_id      OAuth2 client ID\n * @param    o.redirect_uri   OAuth2 redirect URI (e.g. \"http://127.0.0.1:8080/land.html\")\n * @param    o.access_token   Can pre-authorize with an OAuth2 bearer token if you have one\n * @param    o.apiUrl         A base url for the OSM API (default: \"https://api.openstreetmap.org\")\n * @param    o.url            A base url for the OAuth2 handshake (default: \"https://www.openstreetmap.org\")\n * @param    o.auto           If `true`, attempt to authenticate automatically when calling `.xhr()` or `.fetch()` (default: `false`)\n * @param    o.singlepage     If `true`, use page redirection instead of a popup (default: `false`)\n * @param    o.loading        Function called when auth-related xhr calls start\n * @param    o.done           Function called when auth-related xhr calls end\n * @return  `self`\n */\nexport function osmAuth(o) {\n  var oauth = {};\n\n  /**\n   * authenticated\n   * Test whether the user is currently authenticated\n   *\n   * @return {boolean} `true` if authenticated, `false` if not\n   */\n  oauth.authenticated = function() {\n    return !!token('oauth2_access_token');\n  };\n\n\n  /**\n   * logout\n   * Removes any stored authentication tokens (legacy OAuth1 tokens too)\n   *\n   * @return  `self`\n   */\n  oauth.logout = function () {\n    token('oauth2_access_token', '');         // OAuth2\n    token('oauth_token', '');                 // OAuth1\n    token('oauth_token_secret', '');          // OAuth1\n    token('oauth_request_token_secret', '');  // OAuth1\n    return oauth;\n  };\n\n\n  /**\n   * authenticate\n   * First logs out, then runs the authentiation flow, finally calls the callback.\n   * TODO: detect lack of click event  (probably can settimeout it)\n   *\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.authenticate = function(callback) {\n    if (oauth.authenticated()) {\n      callback(null, oauth);\n      return;\n    }\n\n    oauth.logout();\n\n    _preopenPopup(function(error, popup) {\n      if (error) {\n        callback(error);\n      } else {\n        _generatePkceChallenge(function(pkce) {\n          _authenticate(pkce, popup, callback);\n        });\n      }\n    });\n  };\n\n\n  /**\n   * authenticateAsync\n   * Promisified version of `authenticate`\n   * @return  {Promise}  Promise settled with whatever `_authenticate` did\n   */\n  oauth.authenticateAsync = function() {\n    if (oauth.authenticated()) {\n      return Promise.resolve(oauth);\n    }\n\n    oauth.logout();\n\n    return new Promise((resolve, reject) => {\n      var errback = (err, result) => {\n        if (err) {\n          reject(err);\n        } else {\n          resolve(result);\n        }\n      };\n\n      _preopenPopup((error, popup) => {\n        if (error) {\n          errback(error);\n        } else {\n          _generatePkceChallenge(pkce => _authenticate(pkce, popup, errback));\n        }\n      });\n    });\n  };\n\n\n  /**\n   * opens an empty popup to be later used for the authentication page\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  function _preopenPopup(callback) {\n    if (o.singlepage) {\n      callback(null, undefined);\n      return;\n    }\n\n    // Create a 550x610 popup window in the center of the screen\n    var w = 550;\n    var h = 610;\n    var settings = [\n        ['width', w],\n        ['height', h],\n        ['left', window.screen.width / 2 - w / 2],\n        ['top', window.screen.height / 2 - h / 2],\n      ]\n      .map(function (x) { return x.join('='); })\n      .join(',');\n    var popup = window.open('about:blank', 'oauth_window', settings);\n    if (popup) {\n      callback(null, popup);\n    } else {\n      var error = new Error('Popup was blocked');\n      error.status = 'popup-blocked';\n      callback(error);\n    }\n  }\n\n\n  /**\n   * _authenticate\n   * internal authenticate\n   *\n   * @param  {Object}    pkce      Object containing PKCE code challenge properties\n   * @param  {Window}    popup     Popup Window to use for the authentication page, should be undefined when using singlepage mode\n   * @param  {function}  callback  Errback-style callback that accepts `(err, result)`\n   */\n  function _authenticate(pkce, popup, callback) {\n    var state = generateState();\n\n    // ## Request authorization to access resources from the user\n    // and receive authorization code\n    var url =\n      o.url +\n      '/oauth2/authorize?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        response_type: 'code',\n        scope: o.scope,\n        state: state,\n        code_challenge: pkce.code_challenge,\n        code_challenge_method: pkce.code_challenge_method,\n      });\n\n    if (o.singlepage) {\n      if (!store.enabled) {\n        // in singlepage mode, PKCE requires working non-volatile storage\n        var error = new Error('local storage unavailable, but require in singlepage mode');\n        error.status = 'pkce-localstorage-unavailable';\n        callback(error);\n        return;\n      }\n      var params = utilStringQs(window.location.search.slice(1));\n      if (params.code) {\n        oauth.bootstrapToken(params.code, callback);\n      } else {\n        // save OAuth2 state and PKCE challenge in local storage, for later use\n        // in the `/oauth/token` request\n        token('oauth2_state', state);\n        token('oauth2_pkce_code_verifier', pkce.code_verifier);\n        window.location = url;\n      }\n    } else {\n      oauth.popupWindow = popup;\n      popup.location = url;\n    }\n\n    // Called by a function in the redirect URL page, in the popup window. The\n    // window closes itself.\n    window.authComplete = function (url) {\n      var params = utilStringQs(url.split('?')[1]);\n      if (params.state !== state) {\n        error = new Error('Invalid state');\n        error.status = 'invalid-state';\n        callback(error);\n        return;\n      }\n      _getAccessToken(params.code, pkce.code_verifier, accessTokenDone);\n      delete window.authComplete;\n    };\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  }\n\n\n  /**\n   * _getAccessToken\n   * The client requests an access token by authenticating with the\n   * authorization server and presenting the `auth_code`, brought\n   * in from a function call on a landing page popup.\n   * @param  {string}    auth_code\n   * @param  {string}    code_verifier\n   * @param  {function}  accessTokenDone  Errback-style callback `(err, result)`, called when complete\n   */\n  function _getAccessToken(auth_code, code_verifier, accessTokenDone) {\n    var url =\n      o.url +\n      '/oauth2/token?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        grant_type: 'authorization_code',\n        code: auth_code,\n        code_verifier: code_verifier\n      });\n\n    // The authorization server authenticates the client and validates\n    // the authorization grant, and if valid, issues an access token.\n    oauth.rawxhr('POST', url, null, null, null, accessTokenDone);\n    o.loading();\n  }\n\n\n  /**\n   * bringPopupWindowToFront\n   * Tries to bring an existing authentication popup to the front.\n   *\n   * @return {boolean} `true` if it succeeded, `false` if not\n   */\n  oauth.bringPopupWindowToFront = function() {\n    var broughtPopupToFront = false;\n    try {\n      // This may cause a cross-origin error:\n      // `DOMException: Blocked a frame with origin \"...\" from accessing a cross-origin frame.`\n      if (oauth.popupWindow && !oauth.popupWindow.closed) {\n        oauth.popupWindow.focus();\n        broughtPopupToFront = true;\n      }\n    } catch (err) {\n      // Bringing popup window to front failed (probably because of the cross-origin error mentioned above)\n    }\n    return broughtPopupToFront;\n  };\n\n\n  /**\n   * bootstrapToken\n   * The authorization code is a temporary code that a client can exchange for an access token.\n   * If using this library in single-page mode, you'll need to call this once your application\n   * has an `auth_code` and wants to get an access_token.\n   *\n   * @param   {string}   auth_code  The OAuth2 `auth_code`\n   * @param   {function} callback   Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.bootstrapToken = function(auth_code, callback) {\n    var state = token('oauth2_state');\n    token('oauth2_state', '');\n    var params = utilStringQs(window.location.search.slice(1));\n    if (params.state !== state) {\n      var error = new Error('Invalid state');\n      error.status = 'invalid-state';\n      callback(error);\n      return;\n    }\n    var code_verifier = token('oauth2_pkce_code_verifier');\n    token('oauth2_pkce_code_verifier', '');\n    _getAccessToken(auth_code, code_verifier, accessTokenDone);\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  };\n\n\n  /**\n   * fetch\n   * A `fetch` wrapper that includes the Authorization header if the user is authenticated.\n   * https://developer.mozilla.org/en-US/docs/Web/API/fetch\n   *\n   * @param  {string}   resource    Resource passed to `fetch`\n   * @param  {Object}   options     Options passed to `fetch`\n   * @return {Promise}  Promise that wraps `authenticateAsync` then `fetch`\n   */\n  oauth.fetch = function(resource, options) {\n    if (oauth.authenticated()) {\n      return _doFetch();\n    } else {\n      if (o.auto) {\n        return oauth.authenticateAsync().then(_doFetch);\n      } else {\n        return Promise.reject(new Error('not authenticated'));\n      }\n    }\n\n    function _doFetch() {\n      options = options || {};\n      if (!options.headers) {\n        options.headers = { 'Content-Type': 'application/x-www-form-urlencoded' };\n      }\n      options.headers.Authorization = 'Bearer ' + token('oauth2_access_token');\n      return fetch(resource, options);\n    }\n  };\n\n\n  /**\n   * xhr\n   * A `XMLHttpRequest` wrapper that does authenticated calls if the user has logged in.\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param   {Object} options\n   * @param    options.method   Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    options.prefix   If `true` path contains a path, if `false` path contains the full url\n   * @param    options.path     The URL path (e.g. \"/api/0.6/user/details\") (or full url, if `prefix`=`false`)\n   * @param    options.content  Passed to `xhr.send`\n   * @param    options.headers  `Object` containing request headers\n   * @param   {function}         callback  Errback-style callback `(err, result)`, called when complete\n   * @return  {XMLHttpRequest}  `XMLHttpRequest` if authenticated, otherwise `null`\n   */\n  oauth.xhr = function (options, callback) {\n    if (oauth.authenticated()) {\n      return _doXHR();\n    } else {\n      if (o.auto) {\n        oauth.authenticate(_doXHR);\n        return;\n      } else {\n        callback('not authenticated', null);\n        return;\n      }\n    }\n\n    function _doXHR() {\n      var url = options.prefix !== false ? (o.apiUrl + options.path) : options.path;\n      return oauth.rawxhr(\n        options.method,\n        url,\n        token('oauth2_access_token'),\n        options.content,\n        options.headers,\n        done\n      );\n    }\n\n    function done(err, xhr) {\n      if (err) {\n        callback(err);\n      } else if (xhr.responseXML) {\n        callback(err, xhr.responseXML);\n      } else {\n        callback(err, xhr.response);\n      }\n    }\n  };\n\n\n  /**\n   * rawxhr\n   * Creates the XMLHttpRequest set up with a header and response handling\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param    method         Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    url            Passed to `xhr.open`\n   * @param    access_token   OAuth2 bearer token\n   * @param    data           Passed to `xhr.send`\n   * @param    headers        `Object` containing request headers\n   * @param    callback       An \"errback\"-style callback (`err`, `result`), called when complete\n   * @return  `XMLHttpRequest`\n   */\n  oauth.rawxhr = function(method, url, access_token, data, headers, callback) {\n    headers = headers || { 'Content-Type': 'application/x-www-form-urlencoded' };\n\n    if (access_token) {\n      headers.Authorization = 'Bearer ' + access_token;\n    }\n\n    var xhr = new XMLHttpRequest();\n\n    xhr.onreadystatechange = function () {\n      if (4 === xhr.readyState && 0 !== xhr.status) {\n        if (/^20\\d$/.test(xhr.status)) {   // a 20x status code - OK\n          callback(null, xhr);\n        } else {\n          callback(xhr, null);\n        }\n      }\n    };\n    xhr.onerror = function (e) {\n      callback(e, null);\n    };\n\n    xhr.open(method, url, true);\n    for (var h in headers) xhr.setRequestHeader(h, headers[h]);\n\n    xhr.send(data);\n    return xhr;\n  };\n\n\n  /**\n   * preauth\n   * Pre-authorize this object, if we already have access token from the start\n   *\n   * @param   {Object}  val  Object containing `access_token` property\n   * @return  `self`\n   */\n  oauth.preauth = function(val) {\n    if (val && val.access_token) {\n      token('oauth2_access_token', val.access_token);\n    }\n    return oauth;\n  };\n\n\n  /**\n   * options  (getter / setter)\n   * If passed with no arguments, just return the options\n   * If passed an Object, set the options then attempt to pre-authorize\n   *\n   * @param   val?   Object containing options\n   * @return  current `options` (if getting), or `self` (if setting)\n   */\n  oauth.options = function(val) {\n    if (!arguments.length) return o;\n\n    o = val;\n    o.apiUrl = o.apiUrl || 'https://api.openstreetmap.org';\n    o.url = o.url || 'https://www.openstreetmap.org';\n    o.auto = o.auto || false;\n    o.singlepage = o.singlepage || false;\n\n    // Optional loading and loading-done functions for nice UI feedback.\n    // by default, no-ops\n    o.loading = o.loading || function () {};\n    o.done = o.done || function () {};\n    return oauth.preauth(o);\n  };\n\n\n  // Everything below here is initialization/setup code\n\n  // get/set tokens. These are prefixed with the base URL so that `osm-auth`\n  // can be used with multiple APIs and the keys in `localStorage`\n  // will not clash\n  var token;\n\n  if (store.enabled) {\n    token = function (x, y) {\n      if (arguments.length === 1) return store.get(o.url + x);\n      else if (arguments.length === 2) return store.set(o.url + x, y);\n    };\n  } else {\n    var storage = {};\n    token = function (x, y) {\n      if (arguments.length === 1) return storage[o.url + x];\n      else if (arguments.length === 2) return (storage[o.url + x] = y);\n    };\n  }\n\n  // Handle options and attempt to pre-authorize\n  oauth.options(o);\n\n  return oauth;\n}\n\n\n/**\n * utilQsString\n * Transforms object of `key=value` pairs into query string\n * @param   {Object}  Object of `key=value` pairs\n * @returns {string}  query string\n */\nfunction utilQsString(obj) {\n  return Object.keys(obj)\n    .filter(function(key) {\n      return obj[key] !== undefined;\n    })\n    .sort()\n    .map(function(key) {\n      return (encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));\n    })\n    .join('&');\n}\n\n/**\n * utilStringQs\n * Transforms query string into object of `key=value` pairs\n * @param   {string}  query string\n * @returns {Object}  Object of `key=value` pairs\n */\nfunction utilStringQs(str) {\n  var i = 0; // advance past any leading '?' or '#' characters\n  while (i < str.length && (str[i] === '?' || str[i] === '#')) i++;\n  str = str.slice(i);\n\n  return str.split('&').reduce(function(obj, pair) {\n    var parts = pair.split('=');\n    if (parts.length === 2) {\n      obj[parts[0]] = decodeURIComponent(parts[1]);\n    }\n    return obj;\n  }, {});\n}\n\n\n/**\n * supportsWebCryptoAPI\n * https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API\n * @returns {boolean}  `true` if WebCryptoAPI is available\n */\nfunction supportsWebCryptoAPI() {\n  return window && window.crypto\n    && window.crypto.getRandomValues\n    && window.crypto.subtle\n    && window.crypto.subtle.digest;\n}\n\n\n/**\n * Generates a challenge/verifier pair for PKCE.\n * If the browser does not support the WebCryptoAPI, the \"plain\" method is\n * used as a fallback instead of a SHA-256 hash.\n * @param {callback} callback called with the result of the generated PKCE challenge\n */\nfunction _generatePkceChallenge(callback) {\n  var code_verifier;\n  if (supportsWebCryptoAPI()) {\n    // generate a random code_verifier\n    // https://datatracker.ietf.org/doc/html/rfc7636#section-7.1\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    code_verifier = base64(random.buffer);\n    var verifier = Uint8Array.from(Array.from(code_verifier).map(function(char) {\n      return char.charCodeAt(0);\n    }));\n\n    // generate challenge for code verifier\n    window.crypto.subtle.digest('SHA-256', verifier).then(function(hash) {\n      var code_challenge = base64(hash);\n\n      callback({\n        code_challenge: code_challenge,\n        code_verifier: code_verifier,\n        code_challenge_method: 'S256'\n      });\n    });\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    code_verifier = '';\n    for (var i=0; i<64; i++) {\n      code_verifier += chars[Math.floor(Math.random() * chars.length)];\n    }\n    callback({\n      code_verifier: code_verifier,\n      code_challenge: code_verifier,\n      code_challenge_method: 'plain',\n    });\n  }\n}\n\n\n/**\n * Returns a random state to be used as the \"state\" of the OAuth2 authentication\n * See https://datatracker.ietf.org/doc/html/rfc6749#section-10.12\n */\nfunction generateState() {\n  var state;\n  if (supportsWebCryptoAPI()) {\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    state = base64(random.buffer);\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    state = '';\n    for (var i=0; i<64; i++) {\n      state += chars[Math.floor(Math.random() * chars.length)];\n    }\n  }\n  return state;\n}\n\n\n/**\n * base64\n * Converts binary buffer to base64 encoded string, as used in rfc7636\n * @param    {ArrayBuffer}  buffer\n * @returns  {string}       base64 encoded\n */\nfunction base64(buffer) {\n  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)))\n    .replace(/\\//g, '_')\n    .replace(/\\+/g, '-')\n    .replace(/[=]/g, '');\n}"],
-  "mappings": 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+  "sourcesContent": ["\n/**\n * osmAuth\n * Easy authentication with OpenStreetMap over OAuth 2.0.\n * @module\n *\n * @param    o   `Object` containing options:\n * @param    o.scope          OAuth2 scopes requested (e.g. \"read_prefs write_api\")\n * @param    o.client_id      OAuth2 client ID\n * @param    o.redirect_uri   OAuth2 redirect URI (e.g. \"http://127.0.0.1:8080/land.html\")\n * @param    o.access_token   Can pre-authorize with an OAuth2 bearer token if you have one\n * @param    o.apiUrl         A base url for the OSM API (default: \"https://api.openstreetmap.org\")\n * @param    o.url            A base url for the OAuth2 handshake (default: \"https://www.openstreetmap.org\")\n * @param    o.auto           If `true`, attempt to authenticate automatically when calling `.xhr()` or `.fetch()` (default: `false`)\n * @param    o.singlepage     If `true`, use page redirection instead of a popup (default: `false`)\n * @param    o.loading        Function called when auth-related xhr calls start\n * @param    o.done           Function called when auth-related xhr calls end\n * @return  `self`\n */\nexport function osmAuth(o) {\n  var oauth = {};\n\n  // Mock localStorage if needed.\n  // Note that accessing localStorage may throw a `SecurityError`, so wrap in a try/catch.\n  var _store = null;\n  try {\n    _store = window.localStorage;\n  } catch (e) {\n    var _mock = new Map();\n    _store = {\n      isMocked: true,\n      hasItem: (k) => _mock.has(k),\n      getItem: (k) => _mock.get(k),\n      setItem: (k, v) => _mock.set(k, v),\n      removeItem: (k) => _mock.delete(k),\n      clear: () => _mock.clear()\n    };\n  }\n\n  /**\n   * token\n   * Get/Set tokens. These are prefixed with the base URL so that `osm-auth`\n   * can be used with multiple APIs and the keys in `localStorage` will not clash\n   * @param  {string}   k  key\n   * @param  {string?}  v  value\n   * @return {string?}  If getting, returns the stored value or `null`.  If setting, returns `undefined`.\n   */\n  function token(k, v) {\n    if (arguments.length === 1) return _store.getItem(o.url + k);\n    else if (arguments.length === 2) return _store.setItem(o.url + k, v);\n  }\n\n\n  /**\n   * authenticated\n   * Test whether the user is currently authenticated\n   *\n   * @return {boolean} `true` if authenticated, `false` if not\n   */\n  oauth.authenticated = function() {\n    return !!token('oauth2_access_token');\n  };\n\n\n  /**\n   * logout\n   * Removes any stored authentication tokens (legacy OAuth1 tokens too)\n   *\n   * @return  `self`\n   */\n  oauth.logout = function () {\n    token('oauth2_access_token', '');         // OAuth2\n    token('oauth_token', '');                 // OAuth1\n    token('oauth_token_secret', '');          // OAuth1\n    token('oauth_request_token_secret', '');  // OAuth1\n    return oauth;\n  };\n\n\n  /**\n   * authenticate\n   * First logs out, then runs the authentiation flow, finally calls the callback.\n   * TODO: detect lack of click event  (probably can settimeout it)\n   *\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.authenticate = function(callback) {\n    if (oauth.authenticated()) {\n      callback(null, oauth);\n      return;\n    }\n\n    oauth.logout();\n\n    _preopenPopup(function(error, popup) {\n      if (error) {\n        callback(error);\n      } else {\n        _generatePkceChallenge(function(pkce) {\n          _authenticate(pkce, popup, callback);\n        });\n      }\n    });\n  };\n\n\n  /**\n   * authenticateAsync\n   * Promisified version of `authenticate`\n   * @return  {Promise}  Promise settled with whatever `_authenticate` did\n   */\n  oauth.authenticateAsync = function() {\n    if (oauth.authenticated()) {\n      return Promise.resolve(oauth);\n    }\n\n    oauth.logout();\n\n    return new Promise((resolve, reject) => {\n      var errback = (err, result) => {\n        if (err) {\n          reject(err);\n        } else {\n          resolve(result);\n        }\n      };\n\n      _preopenPopup((error, popup) => {\n        if (error) {\n          errback(error);\n        } else {\n          _generatePkceChallenge(pkce => _authenticate(pkce, popup, errback));\n        }\n      });\n    });\n  };\n\n\n  /**\n   * opens an empty popup to be later used for the authentication page\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  function _preopenPopup(callback) {\n    if (o.singlepage) {\n      callback(null, undefined);\n      return;\n    }\n\n    // Create a 550x610 popup window in the center of the screen\n    var w = 550;\n    var h = 610;\n    var settings = [\n        ['width', w],\n        ['height', h],\n        ['left', window.screen.width / 2 - w / 2],\n        ['top', window.screen.height / 2 - h / 2],\n      ]\n      .map(function (x) { return x.join('='); })\n      .join(',');\n    var popup = window.open('about:blank', 'oauth_window', settings);\n    if (popup) {\n      callback(null, popup);\n    } else {\n      var error = new Error('Popup was blocked');\n      error.status = 'popup-blocked';\n      callback(error);\n    }\n  }\n\n\n  /**\n   * _authenticate\n   * internal authenticate\n   *\n   * @param  {Object}    pkce      Object containing PKCE code challenge properties\n   * @param  {Window}    popup     Popup Window to use for the authentication page, should be undefined when using singlepage mode\n   * @param  {function}  callback  Errback-style callback that accepts `(err, result)`\n   */\n  function _authenticate(pkce, popup, callback) {\n    var state = generateState();\n\n    // ## Request authorization to access resources from the user\n    // and receive authorization code\n    var url =\n      o.url +\n      '/oauth2/authorize?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        response_type: 'code',\n        scope: o.scope,\n        state: state,\n        code_challenge: pkce.code_challenge,\n        code_challenge_method: pkce.code_challenge_method,\n      });\n\n    if (o.singlepage) {\n      if (_store.isMocked) {\n        // in singlepage mode, PKCE requires working non-volatile storage\n        var error = new Error('localStorage unavailable, but required in singlepage mode');\n        error.status = 'pkce-localstorage-unavailable';\n        callback(error);\n        return;\n      }\n      var params = utilStringQs(window.location.search.slice(1));\n      if (params.code) {\n        oauth.bootstrapToken(params.code, callback);\n      } else {\n        // save OAuth2 state and PKCE challenge in local storage, for later use\n        // in the `/oauth/token` request\n        token('oauth2_state', state);\n        token('oauth2_pkce_code_verifier', pkce.code_verifier);\n        window.location = url;\n      }\n    } else {\n      oauth.popupWindow = popup;\n      popup.location = url;\n    }\n\n    // Called by a function in the redirect URL page, in the popup window. The\n    // window closes itself.\n    window.authComplete = function (url) {\n      var params = utilStringQs(url.split('?')[1]);\n      if (params.state !== state) {\n        error = new Error('Invalid state');\n        error.status = 'invalid-state';\n        callback(error);\n        return;\n      }\n      _getAccessToken(params.code, pkce.code_verifier, accessTokenDone);\n      delete window.authComplete;\n    };\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  }\n\n\n  /**\n   * _getAccessToken\n   * The client requests an access token by authenticating with the\n   * authorization server and presenting the `auth_code`, brought\n   * in from a function call on a landing page popup.\n   * @param  {string}    auth_code\n   * @param  {string}    code_verifier\n   * @param  {function}  accessTokenDone  Errback-style callback `(err, result)`, called when complete\n   */\n  function _getAccessToken(auth_code, code_verifier, accessTokenDone) {\n    var url =\n      o.url +\n      '/oauth2/token?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        grant_type: 'authorization_code',\n        code: auth_code,\n        code_verifier: code_verifier\n      });\n\n    // The authorization server authenticates the client and validates\n    // the authorization grant, and if valid, issues an access token.\n    oauth.rawxhr('POST', url, null, null, null, accessTokenDone);\n    o.loading();\n  }\n\n\n  /**\n   * bringPopupWindowToFront\n   * Tries to bring an existing authentication popup to the front.\n   *\n   * @return {boolean} `true` if it succeeded, `false` if not\n   */\n  oauth.bringPopupWindowToFront = function() {\n    var broughtPopupToFront = false;\n    try {\n      // This may cause a cross-origin error:\n      // `DOMException: Blocked a frame with origin \"...\" from accessing a cross-origin frame.`\n      if (oauth.popupWindow && !oauth.popupWindow.closed) {\n        oauth.popupWindow.focus();\n        broughtPopupToFront = true;\n      }\n    } catch (err) {\n      // Bringing popup window to front failed (probably because of the cross-origin error mentioned above)\n    }\n    return broughtPopupToFront;\n  };\n\n\n  /**\n   * bootstrapToken\n   * The authorization code is a temporary code that a client can exchange for an access token.\n   * If using this library in single-page mode, you'll need to call this once your application\n   * has an `auth_code` and wants to get an access_token.\n   *\n   * @param   {string}   auth_code  The OAuth2 `auth_code`\n   * @param   {function} callback   Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.bootstrapToken = function(auth_code, callback) {\n    var state = token('oauth2_state');\n    token('oauth2_state', '');\n    var params = utilStringQs(window.location.search.slice(1));\n    if (params.state !== state) {\n      var error = new Error('Invalid state');\n      error.status = 'invalid-state';\n      callback(error);\n      return;\n    }\n    var code_verifier = token('oauth2_pkce_code_verifier');\n    token('oauth2_pkce_code_verifier', '');\n    _getAccessToken(auth_code, code_verifier, accessTokenDone);\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  };\n\n\n  /**\n   * fetch\n   * A `fetch` wrapper that includes the Authorization header if the user is authenticated.\n   * https://developer.mozilla.org/en-US/docs/Web/API/fetch\n   *\n   * @param  {string}   resource    Resource passed to `fetch`\n   * @param  {Object}   options     Options passed to `fetch`\n   * @return {Promise}  Promise that wraps `authenticateAsync` then `fetch`\n   */\n  oauth.fetch = function(resource, options) {\n    if (oauth.authenticated()) {\n      return _doFetch();\n    } else {\n      if (o.auto) {\n        return oauth.authenticateAsync().then(_doFetch);\n      } else {\n        return Promise.reject(new Error('not authenticated'));\n      }\n    }\n\n    function _doFetch() {\n      options = options || {};\n      if (!options.headers) {\n        options.headers = { 'Content-Type': 'application/x-www-form-urlencoded' };\n      }\n      options.headers.Authorization = 'Bearer ' + token('oauth2_access_token');\n      return fetch(resource, options);\n    }\n  };\n\n\n  /**\n   * xhr\n   * A `XMLHttpRequest` wrapper that does authenticated calls if the user has logged in.\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param   {Object} options\n   * @param    options.method   Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    options.prefix   If `true` path contains a path, if `false` path contains the full url\n   * @param    options.path     The URL path (e.g. \"/api/0.6/user/details\") (or full url, if `prefix`=`false`)\n   * @param    options.content  Passed to `xhr.send`\n   * @param    options.headers  `Object` containing request headers\n   * @param   {function}         callback  Errback-style callback `(err, result)`, called when complete\n   * @return  {XMLHttpRequest}  `XMLHttpRequest` if authenticated, otherwise `null`\n   */\n  oauth.xhr = function (options, callback) {\n    if (oauth.authenticated()) {\n      return _doXHR();\n    } else {\n      if (o.auto) {\n        oauth.authenticate(_doXHR);\n        return;\n      } else {\n        callback('not authenticated', null);\n        return;\n      }\n    }\n\n    function _doXHR() {\n      var url = options.prefix !== false ? (o.apiUrl + options.path) : options.path;\n      return oauth.rawxhr(\n        options.method,\n        url,\n        token('oauth2_access_token'),\n        options.content,\n        options.headers,\n        done\n      );\n    }\n\n    function done(err, xhr) {\n      if (err) {\n        callback(err);\n      } else if (xhr.responseXML) {\n        callback(err, xhr.responseXML);\n      } else {\n        callback(err, xhr.response);\n      }\n    }\n  };\n\n\n  /**\n   * rawxhr\n   * Creates the XMLHttpRequest set up with a header and response handling\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param    method         Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    url            Passed to `xhr.open`\n   * @param    access_token   OAuth2 bearer token\n   * @param    data           Passed to `xhr.send`\n   * @param    headers        `Object` containing request headers\n   * @param    callback       An \"errback\"-style callback (`err`, `result`), called when complete\n   * @return  `XMLHttpRequest`\n   */\n  oauth.rawxhr = function(method, url, access_token, data, headers, callback) {\n    headers = headers || { 'Content-Type': 'application/x-www-form-urlencoded' };\n\n    if (access_token) {\n      headers.Authorization = 'Bearer ' + access_token;\n    }\n\n    var xhr = new XMLHttpRequest();\n\n    xhr.onreadystatechange = function () {\n      if (4 === xhr.readyState && 0 !== xhr.status) {\n        if (/^20\\d$/.test(xhr.status)) {   // a 20x status code - OK\n          callback(null, xhr);\n        } else {\n          callback(xhr, null);\n        }\n      }\n    };\n    xhr.onerror = function (e) {\n      callback(e, null);\n    };\n\n    xhr.open(method, url, true);\n    for (var h in headers) xhr.setRequestHeader(h, headers[h]);\n\n    xhr.send(data);\n    return xhr;\n  };\n\n\n  /**\n   * preauth\n   * Pre-authorize this object, if we already have access token from the start\n   *\n   * @param   {Object}  val  Object containing `access_token` property\n   * @return  `self`\n   */\n  oauth.preauth = function(val) {\n    if (val && val.access_token) {\n      token('oauth2_access_token', val.access_token);\n    }\n    return oauth;\n  };\n\n\n  /**\n   * options  (getter / setter)\n   * If passed with no arguments, just return the options\n   * If passed an Object, set the options then attempt to pre-authorize\n   *\n   * @param   val?   Object containing options\n   * @return  current `options` (if getting), or `self` (if setting)\n   */\n  oauth.options = function(val) {\n    if (!arguments.length) return o;\n\n    o = val;\n    o.apiUrl = o.apiUrl || 'https://api.openstreetmap.org';\n    o.url = o.url || 'https://www.openstreetmap.org';\n    o.auto = o.auto || false;\n    o.singlepage = o.singlepage || false;\n\n    // Optional loading and loading-done functions for nice UI feedback.\n    // by default, no-ops\n    o.loading = o.loading || function () {};\n    o.done = o.done || function () {};\n    return oauth.preauth(o);\n  };\n\n\n  // Everything below here is initialization/setup code\n  // Handle options and attempt to pre-authorize\n  oauth.options(o);\n\n  return oauth;\n}\n\n\n/**\n * utilQsString\n * Transforms object of `key=value` pairs into query string\n * @param   {Object}  Object of `key=value` pairs\n * @returns {string}  query string\n */\nfunction utilQsString(obj) {\n  return Object.keys(obj)\n    .filter(function(key) {\n      return obj[key] !== undefined;\n    })\n    .sort()\n    .map(function(key) {\n      return (encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));\n    })\n    .join('&');\n}\n\n/**\n * utilStringQs\n * Transforms query string into object of `key=value` pairs\n * @param   {string}  query string\n * @returns {Object}  Object of `key=value` pairs\n */\nfunction utilStringQs(str) {\n  var i = 0; // advance past any leading '?' or '#' characters\n  while (i < str.length && (str[i] === '?' || str[i] === '#')) i++;\n  str = str.slice(i);\n\n  return str.split('&').reduce(function(obj, pair) {\n    var parts = pair.split('=');\n    if (parts.length === 2) {\n      obj[parts[0]] = decodeURIComponent(parts[1]);\n    }\n    return obj;\n  }, {});\n}\n\n\n/**\n * supportsWebCryptoAPI\n * https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API\n * @returns {boolean}  `true` if WebCryptoAPI is available\n */\nfunction supportsWebCryptoAPI() {\n  return window && window.crypto\n    && window.crypto.getRandomValues\n    && window.crypto.subtle\n    && window.crypto.subtle.digest;\n}\n\n\n/**\n * Generates a challenge/verifier pair for PKCE.\n * If the browser does not support the WebCryptoAPI, the \"plain\" method is\n * used as a fallback instead of a SHA-256 hash.\n * @param {callback} callback called with the result of the generated PKCE challenge\n */\nfunction _generatePkceChallenge(callback) {\n  var code_verifier;\n  if (supportsWebCryptoAPI()) {\n    // generate a random code_verifier\n    // https://datatracker.ietf.org/doc/html/rfc7636#section-7.1\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    code_verifier = base64(random.buffer);\n    var verifier = Uint8Array.from(Array.from(code_verifier).map(function(char) {\n      return char.charCodeAt(0);\n    }));\n\n    // generate challenge for code verifier\n    window.crypto.subtle.digest('SHA-256', verifier).then(function(hash) {\n      var code_challenge = base64(hash);\n\n      callback({\n        code_challenge: code_challenge,\n        code_verifier: code_verifier,\n        code_challenge_method: 'S256'\n      });\n    });\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    code_verifier = '';\n    for (var i=0; i<64; i++) {\n      code_verifier += chars[Math.floor(Math.random() * chars.length)];\n    }\n    callback({\n      code_verifier: code_verifier,\n      code_challenge: code_verifier,\n      code_challenge_method: 'plain',\n    });\n  }\n}\n\n\n/**\n * Returns a random state to be used as the \"state\" of the OAuth2 authentication\n * See https://datatracker.ietf.org/doc/html/rfc6749#section-10.12\n */\nfunction generateState() {\n  var state;\n  if (supportsWebCryptoAPI()) {\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    state = base64(random.buffer);\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    state = '';\n    for (var i=0; i<64; i++) {\n      state += chars[Math.floor(Math.random() * chars.length)];\n    }\n  }\n  return state;\n}\n\n\n/**\n * base64\n * Converts binary buffer to base64 encoded string, as used in rfc7636\n * @param    {ArrayBuffer}  buffer\n * @returns  {string}       base64 encoded\n */\nfunction base64(buffer) {\n  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)))\n    .replace(/\\//g, '_')\n    .replace(/\\+/g, '-')\n    .replace(/[=]/g, '');\n}\n"],
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diff --git a/dist/osm-auth.iife.js b/dist/osm-auth.iife.js
index d5c74aa..06e2e0f 100644
--- a/dist/osm-auth.iife.js
+++ b/dist/osm-auth.iife.js
@@ -1,2 +1,2 @@
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u=W(),i=t.url+"/oauth2/authorize?"+A({client_id:t.client_id,redirect_uri:t.redirect_uri,response_type:"code",scope:t.scope,state:u,code_challenge:n.code_challenge,code_challenge_method:n.code_challenge_method});if(t.singlepage){if(s.isMocked){var c=new Error("localStorage unavailable, but required in singlepage mode");c.status="pkce-localstorage-unavailable",o(c);return}var l=m(window.location.search.slice(1));l.code?e.bootstrapToken(l.code,o):(a("oauth2_state",u),a("oauth2_pkce_code_verifier",n.code_verifier),window.location=i)}else e.popupWindow=r,r.location=i;window.authComplete=function(_){var g=m(_.split("?")[1]);if(g.state!==u){c=new Error("Invalid state"),c.status="invalid-state",o(c);return}f(g.code,n.code_verifier,w),delete window.authComplete};function w(_,g){if(t.done(),_){o(_);return}var S=JSON.parse(g.response);a("oauth2_access_token",S.access_token),o(null,e)}}function f(n,r,o){var u=t.url+"/oauth2/token?"+A({client_id:t.client_id,redirect_uri:t.redirect_uri,grant_type:"authorization_code",code:n,code_verifier:r});e.rawxhr("POST",u,null,null,null,o),t.loading()}return e.bringPopupWindowToFront=function(){var n=!1;try{e.popupWindow&&!e.popupWindow.closed&&(e.popupWindow.focus(),n=!0)}catch(r){}return n},e.bootstrapToken=function(n,r){var o=a("oauth2_state");a("oauth2_state","");var u=m(window.location.search.slice(1));if(u.state!==o){var i=new Error("Invalid state");i.status="invalid-state",r(i);return}var c=a("oauth2_pkce_code_verifier");a("oauth2_pkce_code_verifier",""),f(n,c,l);function l(w,_){if(t.done(),w){r(w);return}var g=JSON.parse(_.response);a("oauth2_access_token",g.access_token),r(null,e)}},e.fetch=function(n,r){if(e.authenticated())return o();return t.auto?e.authenticateAsync().then(o):Promise.reject(new Error("not authenticated"));function o(){return r=r||{},r.headers||(r.headers={"Content-Type":"application/x-www-form-urlencoded"}),r.headers.Authorization="Bearer "+a("oauth2_access_token"),fetch(n,r)}},e.xhr=function(n,r){if(e.authenticated())return o();if(t.auto){e.authenticate(o);return}else{r("not authenticated",null);return}function o(){var i=n.prefix!==!1?t.apiUrl+n.path:n.path;return e.rawxhr(n.method,i,a("oauth2_access_token"),n.content,n.headers,u)}function u(i,c){i?r(i):c.responseXML?r(i,c.responseXML):r(i,c.response)}},e.rawxhr=function(n,r,o,u,i,c){i=i||{"Content-Type":"application/x-www-form-urlencoded"},o&&(i.Authorization="Bearer "+o);var l=new XMLHttpRequest;l.onreadystatechange=function(){l.readyState===4&&l.status!==0&&(/^20\d$/.test(l.status)?c(null,l):c(l,null))},l.onerror=function(_){c(_,null)},l.open(n,r,!0);for(var w in i)l.setRequestHeader(w,i[w]);return l.send(u),l},e.preauth=function(n){return n&&n.access_token&&a("oauth2_access_token",n.access_token),e},e.options=function(n){return arguments.length?(t=n,t.apiUrl=t.apiUrl||"https://api.openstreetmap.org",t.url=t.url||"https://www.openstreetmap.org",t.auto=t.auto||!1,t.singlepage=t.singlepage||!1,t.loading=t.loading||function(){},t.done=t.done||function(){},e.preauth(t)):t},e.options(t),e}function A(t){return Object.keys(t).filter(function(e){return t[e]!==void 0}).sort().map(function(e){return encodeURIComponent(e)+"="+encodeURIComponent(t[e])}).join("&")}function m(t){for(var e=0;e<t.length&&(t[e]==="?"||t[e]==="#");)e++;return t=t.slice(e),t.split("&").reduce(function(s,d){var a=d.split("=");return a.length===2&&(s[a[0]]=decodeURIComponent(a[1])),s},{})}function I(){return window&&window.crypto&&window.crypto.getRandomValues&&window.crypto.subtle&&window.crypto.subtle.digest}function C(t){var e;if(I()){var s=window.crypto.getRandomValues(new Uint8Array(32));e=y(s.buffer);var d=Uint8Array.from(Array.from(e).map(function(p){return p.charCodeAt(0)}));window.crypto.subtle.digest("SHA-256",d).then(function(p){var f=y(p);t({code_challenge:f,code_verifier:e,code_challenge_method:"S256"})})}else{var a="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";e="";for(var h=0;h<64;h++)e+=a[Math.floor(Math.random()*a.length)];t({code_verifier:e,code_challenge:e,code_challenge_method:"plain"})}}function W(){var t;if(I()){var e=window.crypto.getRandomValues(new Uint8Array(32));t=y(e.buffer)}else{var s="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";t="";for(var d=0;d<64;d++)t+=s[Math.floor(Math.random()*s.length)]}return t}function y(t){return btoa(String.fromCharCode.apply(null,new Uint8Array(t))).replace(/\//g,"_").replace(/\+/g,"-").replace(/[=]/g,"")}return R(E);})();
 //# sourceMappingURL=osm-auth.iife.js.map
diff --git a/dist/osm-auth.iife.js.map b/dist/osm-auth.iife.js.map
index 6756cc0..7a61bb0 100644
--- a/dist/osm-auth.iife.js.map
+++ b/dist/osm-auth.iife.js.map
@@ -1,7 +1,7 @@
 {
   "version": 3,
-  "sources": ["../node_modules/store/src/util.js", "../node_modules/store/src/store-engine.js", "../node_modules/store/storages/localStorage.js", "../node_modules/store/storages/oldFF-globalStorage.js", "../node_modules/store/storages/oldIE-userDataStorage.js", "../node_modules/store/storages/cookieStorage.js", "../node_modules/store/storages/sessionStorage.js", "../node_modules/store/storages/memoryStorage.js", "../node_modules/store/storages/all.js", "../node_modules/store/plugins/lib/json2.js", "../node_modules/store/plugins/json2.js", "../node_modules/store/dist/store.legacy.js", "../src/osm-auth.mjs"],
-  "sourcesContent": ["var assign = make_assign()\nvar create = make_create()\nvar trim = make_trim()\nvar Global = (typeof window !== 'undefined' ? window : global)\n\nmodule.exports = {\n\tassign: assign,\n\tcreate: create,\n\ttrim: trim,\n\tbind: bind,\n\tslice: slice,\n\teach: each,\n\tmap: map,\n\tpluck: pluck,\n\tisList: isList,\n\tisFunction: isFunction,\n\tisObject: isObject,\n\tGlobal: Global\n}\n\nfunction make_assign() {\n\tif (Object.assign) {\n\t\treturn Object.assign\n\t} else {\n\t\treturn function shimAssign(obj, props1, props2, etc) {\n\t\t\tfor (var i = 1; i < arguments.length; i++) {\n\t\t\t\teach(Object(arguments[i]), function(val, key) {\n\t\t\t\t\tobj[key] = val\n\t\t\t\t})\n\t\t\t}\t\t\t\n\t\t\treturn obj\n\t\t}\n\t}\n}\n\nfunction make_create() {\n\tif (Object.create) {\n\t\treturn function create(obj, assignProps1, assignProps2, etc) {\n\t\t\tvar assignArgsList = slice(arguments, 1)\n\t\t\treturn assign.apply(this, [Object.create(obj)].concat(assignArgsList))\n\t\t}\n\t} else {\n\t\tfunction F() {} // eslint-disable-line no-inner-declarations\n\t\treturn function create(obj, assignProps1, assignProps2, etc) {\n\t\t\tvar assignArgsList = slice(arguments, 1)\n\t\t\tF.prototype = obj\n\t\t\treturn assign.apply(this, [new F()].concat(assignArgsList))\n\t\t}\n\t}\n}\n\nfunction make_trim() {\n\tif (String.prototype.trim) {\n\t\treturn function trim(str) {\n\t\t\treturn String.prototype.trim.call(str)\n\t\t}\n\t} else {\n\t\treturn function trim(str) {\n\t\t\treturn str.replace(/^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g, '')\n\t\t}\n\t}\n}\n\nfunction bind(obj, fn) {\n\treturn function() {\n\t\treturn fn.apply(obj, Array.prototype.slice.call(arguments, 0))\n\t}\n}\n\nfunction slice(arr, index) {\n\treturn Array.prototype.slice.call(arr, index || 0)\n}\n\nfunction each(obj, fn) {\n\tpluck(obj, function(val, key) {\n\t\tfn(val, key)\n\t\treturn false\n\t})\n}\n\nfunction map(obj, fn) {\n\tvar res = (isList(obj) ? [] : {})\n\tpluck(obj, function(v, k) {\n\t\tres[k] = fn(v, k)\n\t\treturn false\n\t})\n\treturn res\n}\n\nfunction pluck(obj, fn) {\n\tif (isList(obj)) {\n\t\tfor (var i=0; i<obj.length; i++) {\n\t\t\tif (fn(obj[i], i)) {\n\t\t\t\treturn obj[i]\n\t\t\t}\n\t\t}\n\t} else {\n\t\tfor (var key in obj) {\n\t\t\tif (obj.hasOwnProperty(key)) {\n\t\t\t\tif (fn(obj[key], key)) {\n\t\t\t\t\treturn obj[key]\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction isList(val) {\n\treturn (val != null && typeof val != 'function' && typeof val.length == 'number')\n}\n\nfunction isFunction(val) {\n\treturn val && {}.toString.call(val) === '[object Function]'\n}\n\nfunction isObject(val) {\n\treturn val && {}.toString.call(val) === '[object Object]'\n}\n", "var util = require('./util')\nvar slice = util.slice\nvar pluck = util.pluck\nvar each = util.each\nvar bind = util.bind\nvar create = util.create\nvar isList = util.isList\nvar isFunction = util.isFunction\nvar isObject = util.isObject\n\nmodule.exports = {\n\tcreateStore: createStore\n}\n\nvar storeAPI = {\n\tversion: '2.0.12',\n\tenabled: false,\n\t\n\t// get returns the value of the given key. If that value\n\t// is undefined, it returns optionalDefaultValue instead.\n\tget: function(key, optionalDefaultValue) {\n\t\tvar data = this.storage.read(this._namespacePrefix + key)\n\t\treturn this._deserialize(data, optionalDefaultValue)\n\t},\n\n\t// set will store the given value at key and returns value.\n\t// Calling set with value === undefined is equivalent to calling remove.\n\tset: function(key, value) {\n\t\tif (value === undefined) {\n\t\t\treturn this.remove(key)\n\t\t}\n\t\tthis.storage.write(this._namespacePrefix + key, this._serialize(value))\n\t\treturn value\n\t},\n\n\t// remove deletes the key and value stored at the given key.\n\tremove: function(key) {\n\t\tthis.storage.remove(this._namespacePrefix + key)\n\t},\n\n\t// each will call the given callback once for each key-value pair\n\t// in this store.\n\teach: function(callback) {\n\t\tvar self = this\n\t\tthis.storage.each(function(val, namespacedKey) {\n\t\t\tcallback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''))\n\t\t})\n\t},\n\n\t// clearAll will remove all the stored key-value pairs in this store.\n\tclearAll: function() {\n\t\tthis.storage.clearAll()\n\t},\n\n\t// additional functionality that can't live in plugins\n\t// ---------------------------------------------------\n\n\t// hasNamespace returns true if this store instance has the given namespace.\n\thasNamespace: function(namespace) {\n\t\treturn (this._namespacePrefix == '__storejs_'+namespace+'_')\n\t},\n\n\t// createStore creates a store.js instance with the first\n\t// functioning storage in the list of storage candidates,\n\t// and applies the the given mixins to the instance.\n\tcreateStore: function() {\n\t\treturn createStore.apply(this, arguments)\n\t},\n\t\n\taddPlugin: function(plugin) {\n\t\tthis._addPlugin(plugin)\n\t},\n\t\n\tnamespace: function(namespace) {\n\t\treturn createStore(this.storage, this.plugins, namespace)\n\t}\n}\n\nfunction _warn() {\n\tvar _console = (typeof console == 'undefined' ? null : console)\n\tif (!_console) { return }\n\tvar fn = (_console.warn ? _console.warn : _console.log)\n\tfn.apply(_console, arguments)\n}\n\nfunction createStore(storages, plugins, namespace) {\n\tif (!namespace) {\n\t\tnamespace = ''\n\t}\n\tif (storages && !isList(storages)) {\n\t\tstorages = [storages]\n\t}\n\tif (plugins && !isList(plugins)) {\n\t\tplugins = [plugins]\n\t}\n\n\tvar namespacePrefix = (namespace ? '__storejs_'+namespace+'_' : '')\n\tvar namespaceRegexp = (namespace ? new RegExp('^'+namespacePrefix) : null)\n\tvar legalNamespaces = /^[a-zA-Z0-9_\\-]*$/ // alpha-numeric + underscore and dash\n\tif (!legalNamespaces.test(namespace)) {\n\t\tthrow new Error('store.js namespaces can only have alphanumerics + underscores and dashes')\n\t}\n\t\n\tvar _privateStoreProps = {\n\t\t_namespacePrefix: namespacePrefix,\n\t\t_namespaceRegexp: namespaceRegexp,\n\n\t\t_testStorage: function(storage) {\n\t\t\ttry {\n\t\t\t\tvar testStr = '__storejs__test__'\n\t\t\t\tstorage.write(testStr, testStr)\n\t\t\t\tvar ok = (storage.read(testStr) === testStr)\n\t\t\t\tstorage.remove(testStr)\n\t\t\t\treturn ok\n\t\t\t} catch(e) {\n\t\t\t\treturn false\n\t\t\t}\n\t\t},\n\n\t\t_assignPluginFnProp: function(pluginFnProp, propName) {\n\t\t\tvar oldFn = this[propName]\n\t\t\tthis[propName] = function pluginFn() {\n\t\t\t\tvar args = slice(arguments, 0)\n\t\t\t\tvar self = this\n\n\t\t\t\t// super_fn calls the old function which was overwritten by\n\t\t\t\t// this mixin.\n\t\t\t\tfunction super_fn() {\n\t\t\t\t\tif (!oldFn) { return }\n\t\t\t\t\teach(arguments, function(arg, i) {\n\t\t\t\t\t\targs[i] = arg\n\t\t\t\t\t})\n\t\t\t\t\treturn oldFn.apply(self, args)\n\t\t\t\t}\n\n\t\t\t\t// Give mixing function access to super_fn by prefixing all mixin function\n\t\t\t\t// arguments with super_fn.\n\t\t\t\tvar newFnArgs = [super_fn].concat(args)\n\n\t\t\t\treturn pluginFnProp.apply(self, newFnArgs)\n\t\t\t}\n\t\t},\n\n\t\t_serialize: function(obj) {\n\t\t\treturn JSON.stringify(obj)\n\t\t},\n\n\t\t_deserialize: function(strVal, defaultVal) {\n\t\t\tif (!strVal) { return defaultVal }\n\t\t\t// It is possible that a raw string value has been previously stored\n\t\t\t// in a storage without using store.js, meaning it will be a raw\n\t\t\t// string value instead of a JSON serialized string. By defaulting\n\t\t\t// to the raw string value in case of a JSON parse error, we allow\n\t\t\t// for past stored values to be forwards-compatible with store.js\n\t\t\tvar val = ''\n\t\t\ttry { val = JSON.parse(strVal) }\n\t\t\tcatch(e) { val = strVal }\n\n\t\t\treturn (val !== undefined ? val : defaultVal)\n\t\t},\n\t\t\n\t\t_addStorage: function(storage) {\n\t\t\tif (this.enabled) { return }\n\t\t\tif (this._testStorage(storage)) {\n\t\t\t\tthis.storage = storage\n\t\t\t\tthis.enabled = true\n\t\t\t}\n\t\t},\n\n\t\t_addPlugin: function(plugin) {\n\t\t\tvar self = this\n\n\t\t\t// If the plugin is an array, then add all plugins in the array.\n\t\t\t// This allows for a plugin to depend on other plugins.\n\t\t\tif (isList(plugin)) {\n\t\t\t\teach(plugin, function(plugin) {\n\t\t\t\t\tself._addPlugin(plugin)\n\t\t\t\t})\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\t// Keep track of all plugins we've seen so far, so that we\n\t\t\t// don't add any of them twice.\n\t\t\tvar seenPlugin = pluck(this.plugins, function(seenPlugin) {\n\t\t\t\treturn (plugin === seenPlugin)\n\t\t\t})\n\t\t\tif (seenPlugin) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis.plugins.push(plugin)\n\n\t\t\t// Check that the plugin is properly formed\n\t\t\tif (!isFunction(plugin)) {\n\t\t\t\tthrow new Error('Plugins must be function values that return objects')\n\t\t\t}\n\n\t\t\tvar pluginProperties = plugin.call(this)\n\t\t\tif (!isObject(pluginProperties)) {\n\t\t\t\tthrow new Error('Plugins must return an object of function properties')\n\t\t\t}\n\n\t\t\t// Add the plugin function properties to this store instance.\n\t\t\teach(pluginProperties, function(pluginFnProp, propName) {\n\t\t\t\tif (!isFunction(pluginFnProp)) {\n\t\t\t\t\tthrow new Error('Bad plugin property: '+propName+' from plugin '+plugin.name+'. Plugins should only return functions.')\n\t\t\t\t}\n\t\t\t\tself._assignPluginFnProp(pluginFnProp, propName)\n\t\t\t})\n\t\t},\n\t\t\n\t\t// Put deprecated properties in the private API, so as to not expose it to accidential\n\t\t// discovery through inspection of the store object.\n\t\t\n\t\t// Deprecated: addStorage\n\t\taddStorage: function(storage) {\n\t\t\t_warn('store.addStorage(storage) is deprecated. Use createStore([storages])')\n\t\t\tthis._addStorage(storage)\n\t\t}\n\t}\n\n\tvar store = create(_privateStoreProps, storeAPI, {\n\t\tplugins: []\n\t})\n\tstore.raw = {}\n\teach(store, function(prop, propName) {\n\t\tif (isFunction(prop)) {\n\t\t\tstore.raw[propName] = bind(store, prop)\t\t\t\n\t\t}\n\t})\n\teach(storages, function(storage) {\n\t\tstore._addStorage(storage)\n\t})\n\teach(plugins, function(plugin) {\n\t\tstore._addPlugin(plugin)\n\t})\n\treturn store\n}\n", "var util = require('../src/util')\nvar Global = util.Global\n\nmodule.exports = {\n\tname: 'localStorage',\n\tread: read,\n\twrite: write,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll,\n}\n\nfunction localStorage() {\n\treturn Global.localStorage\n}\n\nfunction read(key) {\n\treturn localStorage().getItem(key)\n}\n\nfunction write(key, data) {\n\treturn localStorage().setItem(key, data)\n}\n\nfunction each(fn) {\n\tfor (var i = localStorage().length - 1; i >= 0; i--) {\n\t\tvar key = localStorage().key(i)\n\t\tfn(read(key), key)\n\t}\n}\n\nfunction remove(key) {\n\treturn localStorage().removeItem(key)\n}\n\nfunction clearAll() {\n\treturn localStorage().clear()\n}\n", "// oldFF-globalStorage provides storage for Firefox\n// versions 6 and 7, where no localStorage, etc\n// is available.\n\nvar util = require('../src/util')\nvar Global = util.Global\n\nmodule.exports = {\n\tname: 'oldFF-globalStorage',\n\tread: read,\n\twrite: write,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll,\n}\n\nvar globalStorage = Global.globalStorage\n\nfunction read(key) {\n\treturn globalStorage[key]\n}\n\nfunction write(key, data) {\n\tglobalStorage[key] = data\n}\n\nfunction each(fn) {\n\tfor (var i = globalStorage.length - 1; i >= 0; i--) {\n\t\tvar key = globalStorage.key(i)\n\t\tfn(globalStorage[key], key)\n\t}\n}\n\nfunction remove(key) {\n\treturn globalStorage.removeItem(key)\n}\n\nfunction clearAll() {\n\teach(function(key, _) {\n\t\tdelete globalStorage[key]\n\t})\n}\n", "// oldIE-userDataStorage provides storage for Internet Explorer\n// versions 6 and 7, where no localStorage, sessionStorage, etc\n// is available.\n\nvar util = require('../src/util')\nvar Global = util.Global\n\nmodule.exports = {\n\tname: 'oldIE-userDataStorage',\n\twrite: write,\n\tread: read,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll,\n}\n\nvar storageName = 'storejs'\nvar doc = Global.document\nvar _withStorageEl = _makeIEStorageElFunction()\nvar disable = (Global.navigator ? Global.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\\./) // MSIE 9.x, MSIE 10.x\n\nfunction write(unfixedKey, data) {\n\tif (disable) { return }\n\tvar fixedKey = fixKey(unfixedKey)\n\t_withStorageEl(function(storageEl) {\n\t\tstorageEl.setAttribute(fixedKey, data)\n\t\tstorageEl.save(storageName)\n\t})\n}\n\nfunction read(unfixedKey) {\n\tif (disable) { return }\n\tvar fixedKey = fixKey(unfixedKey)\n\tvar res = null\n\t_withStorageEl(function(storageEl) {\n\t\tres = storageEl.getAttribute(fixedKey)\n\t})\n\treturn res\n}\n\nfunction each(callback) {\n\t_withStorageEl(function(storageEl) {\n\t\tvar attributes = storageEl.XMLDocument.documentElement.attributes\n\t\tfor (var i=attributes.length-1; i>=0; i--) {\n\t\t\tvar attr = attributes[i]\n\t\t\tcallback(storageEl.getAttribute(attr.name), attr.name)\n\t\t}\n\t})\n}\n\nfunction remove(unfixedKey) {\n\tvar fixedKey = fixKey(unfixedKey)\n\t_withStorageEl(function(storageEl) {\n\t\tstorageEl.removeAttribute(fixedKey)\n\t\tstorageEl.save(storageName)\n\t})\n}\n\nfunction clearAll() {\n\t_withStorageEl(function(storageEl) {\n\t\tvar attributes = storageEl.XMLDocument.documentElement.attributes\n\t\tstorageEl.load(storageName)\n\t\tfor (var i=attributes.length-1; i>=0; i--) {\n\t\t\tstorageEl.removeAttribute(attributes[i].name)\n\t\t}\n\t\tstorageEl.save(storageName)\n\t})\n}\n\n// Helpers\n//////////\n\n// In IE7, keys cannot start with a digit or contain certain chars.\n// See https://github.com/marcuswestin/store.js/issues/40\n// See https://github.com/marcuswestin/store.js/issues/83\nvar forbiddenCharsRegex = new RegExp(\"[!\\\"#$%&'()*+,/\\\\\\\\:;<=>?@[\\\\]^`{|}~]\", \"g\")\nfunction fixKey(key) {\n\treturn key.replace(/^\\d/, '___$&').replace(forbiddenCharsRegex, '___')\n}\n\nfunction _makeIEStorageElFunction() {\n\tif (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {\n\t\treturn null\n\t}\n\tvar scriptTag = 'script',\n\t\tstorageOwner,\n\t\tstorageContainer,\n\t\tstorageEl\n\n\t// Since #userData storage applies only to specific paths, we need to\n\t// somehow link our data to a specific path.  We choose /favicon.ico\n\t// as a pretty safe option, since all browsers already make a request to\n\t// this URL anyway and being a 404 will not hurt us here.  We wrap an\n\t// iframe pointing to the favicon in an ActiveXObject(htmlfile) object\n\t// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)\n\t// since the iframe access rules appear to allow direct access and\n\t// manipulation of the document element, even for a 404 page.  This\n\t// document can be used instead of the current document (which would\n\t// have been limited to the current path) to perform #userData storage.\n\ttry {\n\t\t/* global ActiveXObject */\n\t\tstorageContainer = new ActiveXObject('htmlfile')\n\t\tstorageContainer.open()\n\t\tstorageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src=\"/favicon.ico\"></iframe>')\n\t\tstorageContainer.close()\n\t\tstorageOwner = storageContainer.w.frames[0].document\n\t\tstorageEl = storageOwner.createElement('div')\n\t} catch(e) {\n\t\t// somehow ActiveXObject instantiation failed (perhaps some special\n\t\t// security settings or otherwse), fall back to per-path storage\n\t\tstorageEl = doc.createElement('div')\n\t\tstorageOwner = doc.body\n\t}\n\n\treturn function(storeFunction) {\n\t\tvar args = [].slice.call(arguments, 0)\n\t\targs.unshift(storageEl)\n\t\t// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx\n\t\t// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx\n\t\tstorageOwner.appendChild(storageEl)\n\t\tstorageEl.addBehavior('#default#userData')\n\t\tstorageEl.load(storageName)\n\t\tstoreFunction.apply(this, args)\n\t\tstorageOwner.removeChild(storageEl)\n\t\treturn\n\t}\n}\n", "// cookieStorage is useful Safari private browser mode, where localStorage\n// doesn't work but cookies do. This implementation is adopted from\n// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage\n\nvar util = require('../src/util')\nvar Global = util.Global\nvar trim = util.trim\n\nmodule.exports = {\n\tname: 'cookieStorage',\n\tread: read,\n\twrite: write,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll,\n}\n\nvar doc = Global.document\n\nfunction read(key) {\n\tif (!key || !_has(key)) { return null }\n\tvar regexpStr = \"(?:^|.*;\\\\s*)\" +\n\t\tescape(key).replace(/[\\-\\.\\+\\*]/g, \"\\\\$&\") +\n\t\t\"\\\\s*\\\\=\\\\s*((?:[^;](?!;))*[^;]?).*\"\n\treturn unescape(doc.cookie.replace(new RegExp(regexpStr), \"$1\"))\n}\n\nfunction each(callback) {\n\tvar cookies = doc.cookie.split(/; ?/g)\n\tfor (var i = cookies.length - 1; i >= 0; i--) {\n\t\tif (!trim(cookies[i])) {\n\t\t\tcontinue\n\t\t}\n\t\tvar kvp = cookies[i].split('=')\n\t\tvar key = unescape(kvp[0])\n\t\tvar val = unescape(kvp[1])\n\t\tcallback(val, key)\n\t}\n}\n\nfunction write(key, data) {\n\tif(!key) { return }\n\tdoc.cookie = escape(key) + \"=\" + escape(data) + \"; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/\"\n}\n\nfunction remove(key) {\n\tif (!key || !_has(key)) {\n\t\treturn\n\t}\n\tdoc.cookie = escape(key) + \"=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/\"\n}\n\nfunction clearAll() {\n\teach(function(_, key) {\n\t\tremove(key)\n\t})\n}\n\nfunction _has(key) {\n\treturn (new RegExp(\"(?:^|;\\\\s*)\" + escape(key).replace(/[\\-\\.\\+\\*]/g, \"\\\\$&\") + \"\\\\s*\\\\=\")).test(doc.cookie)\n}\n", "var util = require('../src/util')\nvar Global = util.Global\n\nmodule.exports = {\n\tname: 'sessionStorage',\n\tread: read,\n\twrite: write,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll\n}\n\nfunction sessionStorage() {\n\treturn Global.sessionStorage\n}\n\nfunction read(key) {\n\treturn sessionStorage().getItem(key)\n}\n\nfunction write(key, data) {\n\treturn sessionStorage().setItem(key, data)\n}\n\nfunction each(fn) {\n\tfor (var i = sessionStorage().length - 1; i >= 0; i--) {\n\t\tvar key = sessionStorage().key(i)\n\t\tfn(read(key), key)\n\t}\n}\n\nfunction remove(key) {\n\treturn sessionStorage().removeItem(key)\n}\n\nfunction clearAll() {\n\treturn sessionStorage().clear()\n}\n", "// memoryStorage is a useful last fallback to ensure that the store\n// is functions (meaning store.get(), store.set(), etc will all function).\n// However, stored values will not persist when the browser navigates to\n// a new page or reloads the current page.\n\nmodule.exports = {\n\tname: 'memoryStorage',\n\tread: read,\n\twrite: write,\n\teach: each,\n\tremove: remove,\n\tclearAll: clearAll,\n}\n\nvar memoryStorage = {}\n\nfunction read(key) {\n\treturn memoryStorage[key]\n}\n\nfunction write(key, data) {\n\tmemoryStorage[key] = data\n}\n\nfunction each(callback) {\n\tfor (var key in memoryStorage) {\n\t\tif (memoryStorage.hasOwnProperty(key)) {\n\t\t\tcallback(memoryStorage[key], key)\n\t\t}\n\t}\n}\n\nfunction remove(key) {\n\tdelete memoryStorage[key]\n}\n\nfunction clearAll(key) {\n\tmemoryStorage = {}\n}\n", "module.exports = [\n\t// Listed in order of usage preference\n\trequire('./localStorage'),\n\trequire('./oldFF-globalStorage'),\n\trequire('./oldIE-userDataStorage'),\n\trequire('./cookieStorage'),\n\trequire('./sessionStorage'),\n\trequire('./memoryStorage')\n]\n", "/* eslint-disable */\n\n//  json2.js\n//  2016-10-28\n//  Public Domain.\n//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.\n//  See http://www.JSON.org/js.html\n//  This code should be minified before deployment.\n//  See http://javascript.crockford.com/jsmin.html\n\n//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO\n//  NOT CONTROL.\n\n//  This file creates a global JSON object containing two methods: stringify\n//  and parse. This file provides the ES5 JSON capability to ES3 systems.\n//  If a project might run on IE8 or earlier, then this file should be included.\n//  This file does nothing on ES5 systems.\n\n//      JSON.stringify(value, replacer, space)\n//          value       any JavaScript value, usually an object or array.\n//          replacer    an optional parameter that determines how object\n//                      values are stringified for objects. It can be a\n//                      function or an array of strings.\n//          space       an optional parameter that specifies the indentation\n//                      of nested structures. If it is omitted, the text will\n//                      be packed without extra whitespace. If it is a number,\n//                      it will specify the number of spaces to indent at each\n//                      level. If it is a string (such as \"\\t\" or \"&nbsp;\"),\n//                      it contains the characters used to indent at each level.\n//          This method produces a JSON text from a JavaScript value.\n//          When an object value is found, if the object contains a toJSON\n//          method, its toJSON method will be called and the result will be\n//          stringified. A toJSON method does not serialize: it returns the\n//          value represented by the name/value pair that should be serialized,\n//          or undefined if nothing should be serialized. The toJSON method\n//          will be passed the key associated with the value, and this will be\n//          bound to the value.\n\n//          For example, this would serialize Dates as ISO strings.\n\n//              Date.prototype.toJSON = function (key) {\n//                  function f(n) {\n//                      // Format integers to have at least two digits.\n//                      return (n < 10)\n//                          ? \"0\" + n\n//                          : n;\n//                  }\n//                  return this.getUTCFullYear()   + \"-\" +\n//                       f(this.getUTCMonth() + 1) + \"-\" +\n//                       f(this.getUTCDate())      + \"T\" +\n//                       f(this.getUTCHours())     + \":\" +\n//                       f(this.getUTCMinutes())   + \":\" +\n//                       f(this.getUTCSeconds())   + \"Z\";\n//              };\n\n//          You can provide an optional replacer method. It will be passed the\n//          key and value of each member, with this bound to the containing\n//          object. The value that is returned from your method will be\n//          serialized. If your method returns undefined, then the member will\n//          be excluded from the serialization.\n\n//          If the replacer parameter is an array of strings, then it will be\n//          used to select the members to be serialized. It filters the results\n//          such that only members with keys listed in the replacer array are\n//          stringified.\n\n//          Values that do not have JSON representations, such as undefined or\n//          functions, will not be serialized. Such values in objects will be\n//          dropped; in arrays they will be replaced with null. You can use\n//          a replacer function to replace those with JSON values.\n\n//          JSON.stringify(undefined) returns undefined.\n\n//          The optional space parameter produces a stringification of the\n//          value that is filled with line breaks and indentation to make it\n//          easier to read.\n\n//          If the space parameter is a non-empty string, then that string will\n//          be used for indentation. If the space parameter is a number, then\n//          the indentation will be that many spaces.\n\n//          Example:\n\n//          text = JSON.stringify([\"e\", {pluribus: \"unum\"}]);\n//          // text is '[\"e\",{\"pluribus\":\"unum\"}]'\n\n//          text = JSON.stringify([\"e\", {pluribus: \"unum\"}], null, \"\\t\");\n//          // text is '[\\n\\t\"e\",\\n\\t{\\n\\t\\t\"pluribus\": \"unum\"\\n\\t}\\n]'\n\n//          text = JSON.stringify([new Date()], function (key, value) {\n//              return this[key] instanceof Date\n//                  ? \"Date(\" + this[key] + \")\"\n//                  : value;\n//          });\n//          // text is '[\"Date(---current time---)\"]'\n\n//      JSON.parse(text, reviver)\n//          This method parses a JSON text to produce an object or array.\n//          It can throw a SyntaxError exception.\n\n//          The optional reviver parameter is a function that can filter and\n//          transform the results. It receives each of the keys and values,\n//          and its return value is used instead of the original value.\n//          If it returns what it received, then the structure is not modified.\n//          If it returns undefined then the member is deleted.\n\n//          Example:\n\n//          // Parse the text. Values that look like ISO date strings will\n//          // be converted to Date objects.\n\n//          myData = JSON.parse(text, function (key, value) {\n//              var a;\n//              if (typeof value === \"string\") {\n//                  a =\n//   /^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2}(?:\\.\\d*)?)Z$/.exec(value);\n//                  if (a) {\n//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],\n//                          +a[5], +a[6]));\n//                  }\n//              }\n//              return value;\n//          });\n\n//          myData = JSON.parse('[\"Date(09/09/2001)\"]', function (key, value) {\n//              var d;\n//              if (typeof value === \"string\" &&\n//                      value.slice(0, 5) === \"Date(\" &&\n//                      value.slice(-1) === \")\") {\n//                  d = new Date(value.slice(5, -1));\n//                  if (d) {\n//                      return d;\n//                  }\n//              }\n//              return value;\n//          });\n\n//  This is a reference implementation. You are free to copy, modify, or\n//  redistribute.\n\n/*jslint\n    eval, for, this\n*/\n\n/*property\n    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,\n    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,\n    lastIndex, length, parse, prototype, push, replace, slice, stringify,\n    test, toJSON, toString, valueOf\n*/\n\n\n// Create a JSON object only if one does not already exist. We create the\n// methods in a closure to avoid creating global variables.\n\nif (typeof JSON !== \"object\") {\n    JSON = {};\n}\n\n(function () {\n    \"use strict\";\n\n    var rx_one = /^[\\],:{}\\s]*$/;\n    var rx_two = /\\\\(?:[\"\\\\\\/bfnrt]|u[0-9a-fA-F]{4})/g;\n    var rx_three = /\"[^\"\\\\\\n\\r]*\"|true|false|null|-?\\d+(?:\\.\\d*)?(?:[eE][+\\-]?\\d+)?/g;\n    var rx_four = /(?:^|:|,)(?:\\s*\\[)+/g;\n    var rx_escapable = /[\\\\\"\\u0000-\\u001f\\u007f-\\u009f\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g;\n    var rx_dangerous = /[\\u0000\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g;\n\n    function f(n) {\n        // Format integers to have at least two digits.\n        return n < 10\n            ? \"0\" + n\n            : n;\n    }\n\n    function this_value() {\n        return this.valueOf();\n    }\n\n    if (typeof Date.prototype.toJSON !== \"function\") {\n\n        Date.prototype.toJSON = function () {\n\n            return isFinite(this.valueOf())\n                ? this.getUTCFullYear() + \"-\" +\n                        f(this.getUTCMonth() + 1) + \"-\" +\n                        f(this.getUTCDate()) + \"T\" +\n                        f(this.getUTCHours()) + \":\" +\n                        f(this.getUTCMinutes()) + \":\" +\n                        f(this.getUTCSeconds()) + \"Z\"\n                : null;\n        };\n\n        Boolean.prototype.toJSON = this_value;\n        Number.prototype.toJSON = this_value;\n        String.prototype.toJSON = this_value;\n    }\n\n    var gap;\n    var indent;\n    var meta;\n    var rep;\n\n\n    function quote(string) {\n\n// If the string contains no control characters, no quote characters, and no\n// backslash characters, then we can safely slap some quotes around it.\n// Otherwise we must also replace the offending characters with safe escape\n// sequences.\n\n        rx_escapable.lastIndex = 0;\n        return rx_escapable.test(string)\n            ? \"\\\"\" + string.replace(rx_escapable, function (a) {\n                var c = meta[a];\n                return typeof c === \"string\"\n                    ? c\n                    : \"\\\\u\" + (\"0000\" + a.charCodeAt(0).toString(16)).slice(-4);\n            }) + \"\\\"\"\n            : \"\\\"\" + string + \"\\\"\";\n    }\n\n\n    function str(key, holder) {\n\n// Produce a string from holder[key].\n\n        var i;          // The loop counter.\n        var k;          // The member key.\n        var v;          // The member value.\n        var length;\n        var mind = gap;\n        var partial;\n        var value = holder[key];\n\n// If the value has a toJSON method, call it to obtain a replacement value.\n\n        if (value && typeof value === \"object\" &&\n                typeof value.toJSON === \"function\") {\n            value = value.toJSON(key);\n        }\n\n// If we were called with a replacer function, then call the replacer to\n// obtain a replacement value.\n\n        if (typeof rep === \"function\") {\n            value = rep.call(holder, key, value);\n        }\n\n// What happens next depends on the value's type.\n\n        switch (typeof value) {\n        case \"string\":\n            return quote(value);\n\n        case \"number\":\n\n// JSON numbers must be finite. Encode non-finite numbers as null.\n\n            return isFinite(value)\n                ? String(value)\n                : \"null\";\n\n        case \"boolean\":\n        case \"null\":\n\n// If the value is a boolean or null, convert it to a string. Note:\n// typeof null does not produce \"null\". The case is included here in\n// the remote chance that this gets fixed someday.\n\n            return String(value);\n\n// If the type is \"object\", we might be dealing with an object or an array or\n// null.\n\n        case \"object\":\n\n// Due to a specification blunder in ECMAScript, typeof null is \"object\",\n// so watch out for that case.\n\n            if (!value) {\n                return \"null\";\n            }\n\n// Make an array to hold the partial results of stringifying this object value.\n\n            gap += indent;\n            partial = [];\n\n// Is the value an array?\n\n            if (Object.prototype.toString.apply(value) === \"[object Array]\") {\n\n// The value is an array. Stringify every element. Use null as a placeholder\n// for non-JSON values.\n\n                length = value.length;\n                for (i = 0; i < length; i += 1) {\n                    partial[i] = str(i, value) || \"null\";\n                }\n\n// Join all of the elements together, separated with commas, and wrap them in\n// brackets.\n\n                v = partial.length === 0\n                    ? \"[]\"\n                    : gap\n                        ? \"[\\n\" + gap + partial.join(\",\\n\" + gap) + \"\\n\" + mind + \"]\"\n                        : \"[\" + partial.join(\",\") + \"]\";\n                gap = mind;\n                return v;\n            }\n\n// If the replacer is an array, use it to select the members to be stringified.\n\n            if (rep && typeof rep === \"object\") {\n                length = rep.length;\n                for (i = 0; i < length; i += 1) {\n                    if (typeof rep[i] === \"string\") {\n                        k = rep[i];\n                        v = str(k, value);\n                        if (v) {\n                            partial.push(quote(k) + (\n                                gap\n                                    ? \": \"\n                                    : \":\"\n                            ) + v);\n                        }\n                    }\n                }\n            } else {\n\n// Otherwise, iterate through all of the keys in the object.\n\n                for (k in value) {\n                    if (Object.prototype.hasOwnProperty.call(value, k)) {\n                        v = str(k, value);\n                        if (v) {\n                            partial.push(quote(k) + (\n                                gap\n                                    ? \": \"\n                                    : \":\"\n                            ) + v);\n                        }\n                    }\n                }\n            }\n\n// Join all of the member texts together, separated with commas,\n// and wrap them in braces.\n\n            v = partial.length === 0\n                ? \"{}\"\n                : gap\n                    ? \"{\\n\" + gap + partial.join(\",\\n\" + gap) + \"\\n\" + mind + \"}\"\n                    : \"{\" + partial.join(\",\") + \"}\";\n            gap = mind;\n            return v;\n        }\n    }\n\n// If the JSON object does not yet have a stringify method, give it one.\n\n    if (typeof JSON.stringify !== \"function\") {\n        meta = {    // table of character substitutions\n            \"\\b\": \"\\\\b\",\n            \"\\t\": \"\\\\t\",\n            \"\\n\": \"\\\\n\",\n            \"\\f\": \"\\\\f\",\n            \"\\r\": \"\\\\r\",\n            \"\\\"\": \"\\\\\\\"\",\n            \"\\\\\": \"\\\\\\\\\"\n        };\n        JSON.stringify = function (value, replacer, space) {\n\n// The stringify method takes a value and an optional replacer, and an optional\n// space parameter, and returns a JSON text. The replacer can be a function\n// that can replace values, or an array of strings that will select the keys.\n// A default replacer method can be provided. Use of the space parameter can\n// produce text that is more easily readable.\n\n            var i;\n            gap = \"\";\n            indent = \"\";\n\n// If the space parameter is a number, make an indent string containing that\n// many spaces.\n\n            if (typeof space === \"number\") {\n                for (i = 0; i < space; i += 1) {\n                    indent += \" \";\n                }\n\n// If the space parameter is a string, it will be used as the indent string.\n\n            } else if (typeof space === \"string\") {\n                indent = space;\n            }\n\n// If there is a replacer, it must be a function or an array.\n// Otherwise, throw an error.\n\n            rep = replacer;\n            if (replacer && typeof replacer !== \"function\" &&\n                    (typeof replacer !== \"object\" ||\n                    typeof replacer.length !== \"number\")) {\n                throw new Error(\"JSON.stringify\");\n            }\n\n// Make a fake root object containing our value under the key of \"\".\n// Return the result of stringifying the value.\n\n            return str(\"\", {\"\": value});\n        };\n    }\n\n\n// If the JSON object does not yet have a parse method, give it one.\n\n    if (typeof JSON.parse !== \"function\") {\n        JSON.parse = function (text, reviver) {\n\n// The parse method takes a text and an optional reviver function, and returns\n// a JavaScript value if the text is a valid JSON text.\n\n            var j;\n\n            function walk(holder, key) {\n\n// The walk method is used to recursively walk the resulting structure so\n// that modifications can be made.\n\n                var k;\n                var v;\n                var value = holder[key];\n                if (value && typeof value === \"object\") {\n                    for (k in value) {\n                        if (Object.prototype.hasOwnProperty.call(value, k)) {\n                            v = walk(value, k);\n                            if (v !== undefined) {\n                                value[k] = v;\n                            } else {\n                                delete value[k];\n                            }\n                        }\n                    }\n                }\n                return reviver.call(holder, key, value);\n            }\n\n\n// Parsing happens in four stages. In the first stage, we replace certain\n// Unicode characters with escape sequences. JavaScript handles many characters\n// incorrectly, either silently deleting them, or treating them as line endings.\n\n            text = String(text);\n            rx_dangerous.lastIndex = 0;\n            if (rx_dangerous.test(text)) {\n                text = text.replace(rx_dangerous, function (a) {\n                    return \"\\\\u\" +\n                            (\"0000\" + a.charCodeAt(0).toString(16)).slice(-4);\n                });\n            }\n\n// In the second stage, we run the text against regular expressions that look\n// for non-JSON patterns. We are especially concerned with \"()\" and \"new\"\n// because they can cause invocation, and \"=\" because it can cause mutation.\n// But just to be safe, we want to reject all unexpected forms.\n\n// We split the second stage into 4 regexp operations in order to work around\n// crippling inefficiencies in IE's and Safari's regexp engines. First we\n// replace the JSON backslash pairs with \"@\" (a non-JSON character). Second, we\n// replace all simple value tokens with \"]\" characters. Third, we delete all\n// open brackets that follow a colon or comma or that begin the text. Finally,\n// we look to see that the remaining characters are only whitespace or \"]\" or\n// \",\" or \":\" or \"{\" or \"}\". If that is so, then the text is safe for eval.\n\n            if (\n                rx_one.test(\n                    text\n                        .replace(rx_two, \"@\")\n                        .replace(rx_three, \"]\")\n                        .replace(rx_four, \"\")\n                )\n            ) {\n\n// In the third stage we use the eval function to compile the text into a\n// JavaScript structure. The \"{\" operator is subject to a syntactic ambiguity\n// in JavaScript: it can begin a block or an object literal. We wrap the text\n// in parens to eliminate the ambiguity.\n\n                j = eval(\"(\" + text + \")\");\n\n// In the optional fourth stage, we recursively walk the new structure, passing\n// each name/value pair to a reviver function for possible transformation.\n\n                return (typeof reviver === \"function\")\n                    ? walk({\"\": j}, \"\")\n                    : j;\n            }\n\n// If the text is not JSON parseable, then a SyntaxError is thrown.\n\n            throw new SyntaxError(\"JSON.parse\");\n        };\n    }\n}());", "module.exports = json2Plugin\n\nfunction json2Plugin() {\n\trequire('./lib/json2')\n\treturn {}\n}\n", "var engine = require('../src/store-engine')\n\nvar storages = require('../storages/all')\nvar plugins = [require('../plugins/json2')]\n\nmodule.exports = engine.createStore(storages, plugins)\n", "import store from 'store';\n\n\n/**\n * osmAuth\n * Easy authentication with OpenStreetMap over OAuth 2.0.\n * @module\n *\n * @param    o   `Object` containing options:\n * @param    o.scope          OAuth2 scopes requested (e.g. \"read_prefs write_api\")\n * @param    o.client_id      OAuth2 client ID\n * @param    o.redirect_uri   OAuth2 redirect URI (e.g. \"http://127.0.0.1:8080/land.html\")\n * @param    o.access_token   Can pre-authorize with an OAuth2 bearer token if you have one\n * @param    o.apiUrl         A base url for the OSM API (default: \"https://api.openstreetmap.org\")\n * @param    o.url            A base url for the OAuth2 handshake (default: \"https://www.openstreetmap.org\")\n * @param    o.auto           If `true`, attempt to authenticate automatically when calling `.xhr()` or `.fetch()` (default: `false`)\n * @param    o.singlepage     If `true`, use page redirection instead of a popup (default: `false`)\n * @param    o.loading        Function called when auth-related xhr calls start\n * @param    o.done           Function called when auth-related xhr calls end\n * @return  `self`\n */\nexport function osmAuth(o) {\n  var oauth = {};\n\n  /**\n   * authenticated\n   * Test whether the user is currently authenticated\n   *\n   * @return {boolean} `true` if authenticated, `false` if not\n   */\n  oauth.authenticated = function() {\n    return !!token('oauth2_access_token');\n  };\n\n\n  /**\n   * logout\n   * Removes any stored authentication tokens (legacy OAuth1 tokens too)\n   *\n   * @return  `self`\n   */\n  oauth.logout = function () {\n    token('oauth2_access_token', '');         // OAuth2\n    token('oauth_token', '');                 // OAuth1\n    token('oauth_token_secret', '');          // OAuth1\n    token('oauth_request_token_secret', '');  // OAuth1\n    return oauth;\n  };\n\n\n  /**\n   * authenticate\n   * First logs out, then runs the authentiation flow, finally calls the callback.\n   * TODO: detect lack of click event  (probably can settimeout it)\n   *\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.authenticate = function(callback) {\n    if (oauth.authenticated()) {\n      callback(null, oauth);\n      return;\n    }\n\n    oauth.logout();\n\n    _preopenPopup(function(error, popup) {\n      if (error) {\n        callback(error);\n      } else {\n        _generatePkceChallenge(function(pkce) {\n          _authenticate(pkce, popup, callback);\n        });\n      }\n    });\n  };\n\n\n  /**\n   * authenticateAsync\n   * Promisified version of `authenticate`\n   * @return  {Promise}  Promise settled with whatever `_authenticate` did\n   */\n  oauth.authenticateAsync = function() {\n    if (oauth.authenticated()) {\n      return Promise.resolve(oauth);\n    }\n\n    oauth.logout();\n\n    return new Promise((resolve, reject) => {\n      var errback = (err, result) => {\n        if (err) {\n          reject(err);\n        } else {\n          resolve(result);\n        }\n      };\n\n      _preopenPopup((error, popup) => {\n        if (error) {\n          errback(error);\n        } else {\n          _generatePkceChallenge(pkce => _authenticate(pkce, popup, errback));\n        }\n      });\n    });\n  };\n\n\n  /**\n   * opens an empty popup to be later used for the authentication page\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  function _preopenPopup(callback) {\n    if (o.singlepage) {\n      callback(null, undefined);\n      return;\n    }\n\n    // Create a 550x610 popup window in the center of the screen\n    var w = 550;\n    var h = 610;\n    var settings = [\n        ['width', w],\n        ['height', h],\n        ['left', window.screen.width / 2 - w / 2],\n        ['top', window.screen.height / 2 - h / 2],\n      ]\n      .map(function (x) { return x.join('='); })\n      .join(',');\n    var popup = window.open('about:blank', 'oauth_window', settings);\n    if (popup) {\n      callback(null, popup);\n    } else {\n      var error = new Error('Popup was blocked');\n      error.status = 'popup-blocked';\n      callback(error);\n    }\n  }\n\n\n  /**\n   * _authenticate\n   * internal authenticate\n   *\n   * @param  {Object}    pkce      Object containing PKCE code challenge properties\n   * @param  {Window}    popup     Popup Window to use for the authentication page, should be undefined when using singlepage mode\n   * @param  {function}  callback  Errback-style callback that accepts `(err, result)`\n   */\n  function _authenticate(pkce, popup, callback) {\n    var state = generateState();\n\n    // ## Request authorization to access resources from the user\n    // and receive authorization code\n    var url =\n      o.url +\n      '/oauth2/authorize?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        response_type: 'code',\n        scope: o.scope,\n        state: state,\n        code_challenge: pkce.code_challenge,\n        code_challenge_method: pkce.code_challenge_method,\n      });\n\n    if (o.singlepage) {\n      if (!store.enabled) {\n        // in singlepage mode, PKCE requires working non-volatile storage\n        var error = new Error('local storage unavailable, but require in singlepage mode');\n        error.status = 'pkce-localstorage-unavailable';\n        callback(error);\n        return;\n      }\n      var params = utilStringQs(window.location.search.slice(1));\n      if (params.code) {\n        oauth.bootstrapToken(params.code, callback);\n      } else {\n        // save OAuth2 state and PKCE challenge in local storage, for later use\n        // in the `/oauth/token` request\n        token('oauth2_state', state);\n        token('oauth2_pkce_code_verifier', pkce.code_verifier);\n        window.location = url;\n      }\n    } else {\n      oauth.popupWindow = popup;\n      popup.location = url;\n    }\n\n    // Called by a function in the redirect URL page, in the popup window. The\n    // window closes itself.\n    window.authComplete = function (url) {\n      var params = utilStringQs(url.split('?')[1]);\n      if (params.state !== state) {\n        error = new Error('Invalid state');\n        error.status = 'invalid-state';\n        callback(error);\n        return;\n      }\n      _getAccessToken(params.code, pkce.code_verifier, accessTokenDone);\n      delete window.authComplete;\n    };\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  }\n\n\n  /**\n   * _getAccessToken\n   * The client requests an access token by authenticating with the\n   * authorization server and presenting the `auth_code`, brought\n   * in from a function call on a landing page popup.\n   * @param  {string}    auth_code\n   * @param  {string}    code_verifier\n   * @param  {function}  accessTokenDone  Errback-style callback `(err, result)`, called when complete\n   */\n  function _getAccessToken(auth_code, code_verifier, accessTokenDone) {\n    var url =\n      o.url +\n      '/oauth2/token?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        grant_type: 'authorization_code',\n        code: auth_code,\n        code_verifier: code_verifier\n      });\n\n    // The authorization server authenticates the client and validates\n    // the authorization grant, and if valid, issues an access token.\n    oauth.rawxhr('POST', url, null, null, null, accessTokenDone);\n    o.loading();\n  }\n\n\n  /**\n   * bringPopupWindowToFront\n   * Tries to bring an existing authentication popup to the front.\n   *\n   * @return {boolean} `true` if it succeeded, `false` if not\n   */\n  oauth.bringPopupWindowToFront = function() {\n    var broughtPopupToFront = false;\n    try {\n      // This may cause a cross-origin error:\n      // `DOMException: Blocked a frame with origin \"...\" from accessing a cross-origin frame.`\n      if (oauth.popupWindow && !oauth.popupWindow.closed) {\n        oauth.popupWindow.focus();\n        broughtPopupToFront = true;\n      }\n    } catch (err) {\n      // Bringing popup window to front failed (probably because of the cross-origin error mentioned above)\n    }\n    return broughtPopupToFront;\n  };\n\n\n  /**\n   * bootstrapToken\n   * The authorization code is a temporary code that a client can exchange for an access token.\n   * If using this library in single-page mode, you'll need to call this once your application\n   * has an `auth_code` and wants to get an access_token.\n   *\n   * @param   {string}   auth_code  The OAuth2 `auth_code`\n   * @param   {function} callback   Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.bootstrapToken = function(auth_code, callback) {\n    var state = token('oauth2_state');\n    token('oauth2_state', '');\n    var params = utilStringQs(window.location.search.slice(1));\n    if (params.state !== state) {\n      var error = new Error('Invalid state');\n      error.status = 'invalid-state';\n      callback(error);\n      return;\n    }\n    var code_verifier = token('oauth2_pkce_code_verifier');\n    token('oauth2_pkce_code_verifier', '');\n    _getAccessToken(auth_code, code_verifier, accessTokenDone);\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  };\n\n\n  /**\n   * fetch\n   * A `fetch` wrapper that includes the Authorization header if the user is authenticated.\n   * https://developer.mozilla.org/en-US/docs/Web/API/fetch\n   *\n   * @param  {string}   resource    Resource passed to `fetch`\n   * @param  {Object}   options     Options passed to `fetch`\n   * @return {Promise}  Promise that wraps `authenticateAsync` then `fetch`\n   */\n  oauth.fetch = function(resource, options) {\n    if (oauth.authenticated()) {\n      return _doFetch();\n    } else {\n      if (o.auto) {\n        return oauth.authenticateAsync().then(_doFetch);\n      } else {\n        return Promise.reject(new Error('not authenticated'));\n      }\n    }\n\n    function _doFetch() {\n      options = options || {};\n      if (!options.headers) {\n        options.headers = { 'Content-Type': 'application/x-www-form-urlencoded' };\n      }\n      options.headers.Authorization = 'Bearer ' + token('oauth2_access_token');\n      return fetch(resource, options);\n    }\n  };\n\n\n  /**\n   * xhr\n   * A `XMLHttpRequest` wrapper that does authenticated calls if the user has logged in.\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param   {Object} options\n   * @param    options.method   Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    options.prefix   If `true` path contains a path, if `false` path contains the full url\n   * @param    options.path     The URL path (e.g. \"/api/0.6/user/details\") (or full url, if `prefix`=`false`)\n   * @param    options.content  Passed to `xhr.send`\n   * @param    options.headers  `Object` containing request headers\n   * @param   {function}         callback  Errback-style callback `(err, result)`, called when complete\n   * @return  {XMLHttpRequest}  `XMLHttpRequest` if authenticated, otherwise `null`\n   */\n  oauth.xhr = function (options, callback) {\n    if (oauth.authenticated()) {\n      return _doXHR();\n    } else {\n      if (o.auto) {\n        oauth.authenticate(_doXHR);\n        return;\n      } else {\n        callback('not authenticated', null);\n        return;\n      }\n    }\n\n    function _doXHR() {\n      var url = options.prefix !== false ? (o.apiUrl + options.path) : options.path;\n      return oauth.rawxhr(\n        options.method,\n        url,\n        token('oauth2_access_token'),\n        options.content,\n        options.headers,\n        done\n      );\n    }\n\n    function done(err, xhr) {\n      if (err) {\n        callback(err);\n      } else if (xhr.responseXML) {\n        callback(err, xhr.responseXML);\n      } else {\n        callback(err, xhr.response);\n      }\n    }\n  };\n\n\n  /**\n   * rawxhr\n   * Creates the XMLHttpRequest set up with a header and response handling\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param    method         Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    url            Passed to `xhr.open`\n   * @param    access_token   OAuth2 bearer token\n   * @param    data           Passed to `xhr.send`\n   * @param    headers        `Object` containing request headers\n   * @param    callback       An \"errback\"-style callback (`err`, `result`), called when complete\n   * @return  `XMLHttpRequest`\n   */\n  oauth.rawxhr = function(method, url, access_token, data, headers, callback) {\n    headers = headers || { 'Content-Type': 'application/x-www-form-urlencoded' };\n\n    if (access_token) {\n      headers.Authorization = 'Bearer ' + access_token;\n    }\n\n    var xhr = new XMLHttpRequest();\n\n    xhr.onreadystatechange = function () {\n      if (4 === xhr.readyState && 0 !== xhr.status) {\n        if (/^20\\d$/.test(xhr.status)) {   // a 20x status code - OK\n          callback(null, xhr);\n        } else {\n          callback(xhr, null);\n        }\n      }\n    };\n    xhr.onerror = function (e) {\n      callback(e, null);\n    };\n\n    xhr.open(method, url, true);\n    for (var h in headers) xhr.setRequestHeader(h, headers[h]);\n\n    xhr.send(data);\n    return xhr;\n  };\n\n\n  /**\n   * preauth\n   * Pre-authorize this object, if we already have access token from the start\n   *\n   * @param   {Object}  val  Object containing `access_token` property\n   * @return  `self`\n   */\n  oauth.preauth = function(val) {\n    if (val && val.access_token) {\n      token('oauth2_access_token', val.access_token);\n    }\n    return oauth;\n  };\n\n\n  /**\n   * options  (getter / setter)\n   * If passed with no arguments, just return the options\n   * If passed an Object, set the options then attempt to pre-authorize\n   *\n   * @param   val?   Object containing options\n   * @return  current `options` (if getting), or `self` (if setting)\n   */\n  oauth.options = function(val) {\n    if (!arguments.length) return o;\n\n    o = val;\n    o.apiUrl = o.apiUrl || 'https://api.openstreetmap.org';\n    o.url = o.url || 'https://www.openstreetmap.org';\n    o.auto = o.auto || false;\n    o.singlepage = o.singlepage || false;\n\n    // Optional loading and loading-done functions for nice UI feedback.\n    // by default, no-ops\n    o.loading = o.loading || function () {};\n    o.done = o.done || function () {};\n    return oauth.preauth(o);\n  };\n\n\n  // Everything below here is initialization/setup code\n\n  // get/set tokens. These are prefixed with the base URL so that `osm-auth`\n  // can be used with multiple APIs and the keys in `localStorage`\n  // will not clash\n  var token;\n\n  if (store.enabled) {\n    token = function (x, y) {\n      if (arguments.length === 1) return store.get(o.url + x);\n      else if (arguments.length === 2) return store.set(o.url + x, y);\n    };\n  } else {\n    var storage = {};\n    token = function (x, y) {\n      if (arguments.length === 1) return storage[o.url + x];\n      else if (arguments.length === 2) return (storage[o.url + x] = y);\n    };\n  }\n\n  // Handle options and attempt to pre-authorize\n  oauth.options(o);\n\n  return oauth;\n}\n\n\n/**\n * utilQsString\n * Transforms object of `key=value` pairs into query string\n * @param   {Object}  Object of `key=value` pairs\n * @returns {string}  query string\n */\nfunction utilQsString(obj) {\n  return Object.keys(obj)\n    .filter(function(key) {\n      return obj[key] !== undefined;\n    })\n    .sort()\n    .map(function(key) {\n      return (encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));\n    })\n    .join('&');\n}\n\n/**\n * utilStringQs\n * Transforms query string into object of `key=value` pairs\n * @param   {string}  query string\n * @returns {Object}  Object of `key=value` pairs\n */\nfunction utilStringQs(str) {\n  var i = 0; // advance past any leading '?' or '#' characters\n  while (i < str.length && (str[i] === '?' || str[i] === '#')) i++;\n  str = str.slice(i);\n\n  return str.split('&').reduce(function(obj, pair) {\n    var parts = pair.split('=');\n    if (parts.length === 2) {\n      obj[parts[0]] = decodeURIComponent(parts[1]);\n    }\n    return obj;\n  }, {});\n}\n\n\n/**\n * supportsWebCryptoAPI\n * https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API\n * @returns {boolean}  `true` if WebCryptoAPI is available\n */\nfunction supportsWebCryptoAPI() {\n  return window && window.crypto\n    && window.crypto.getRandomValues\n    && window.crypto.subtle\n    && window.crypto.subtle.digest;\n}\n\n\n/**\n * Generates a challenge/verifier pair for PKCE.\n * If the browser does not support the WebCryptoAPI, the \"plain\" method is\n * used as a fallback instead of a SHA-256 hash.\n * @param {callback} callback called with the result of the generated PKCE challenge\n */\nfunction _generatePkceChallenge(callback) {\n  var code_verifier;\n  if (supportsWebCryptoAPI()) {\n    // generate a random code_verifier\n    // https://datatracker.ietf.org/doc/html/rfc7636#section-7.1\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    code_verifier = base64(random.buffer);\n    var verifier = Uint8Array.from(Array.from(code_verifier).map(function(char) {\n      return char.charCodeAt(0);\n    }));\n\n    // generate challenge for code verifier\n    window.crypto.subtle.digest('SHA-256', verifier).then(function(hash) {\n      var code_challenge = base64(hash);\n\n      callback({\n        code_challenge: code_challenge,\n        code_verifier: code_verifier,\n        code_challenge_method: 'S256'\n      });\n    });\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    code_verifier = '';\n    for (var i=0; i<64; i++) {\n      code_verifier += chars[Math.floor(Math.random() * chars.length)];\n    }\n    callback({\n      code_verifier: code_verifier,\n      code_challenge: code_verifier,\n      code_challenge_method: 'plain',\n    });\n  }\n}\n\n\n/**\n * Returns a random state to be used as the \"state\" of the OAuth2 authentication\n * See https://datatracker.ietf.org/doc/html/rfc6749#section-10.12\n */\nfunction generateState() {\n  var state;\n  if (supportsWebCryptoAPI()) {\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    state = base64(random.buffer);\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    state = '';\n    for (var i=0; i<64; i++) {\n      state += chars[Math.floor(Math.random() * chars.length)];\n    }\n  }\n  return state;\n}\n\n\n/**\n * base64\n * Converts binary buffer to base64 encoded string, as used in rfc7636\n * @param    {ArrayBuffer}  buffer\n * @returns  {string}       base64 encoded\n */\nfunction base64(buffer) {\n  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)))\n    .replace(/\\//g, '_')\n    .replace(/\\+/g, '-')\n    .replace(/[=]/g, '');\n}"],
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+  "sources": ["../src/osm-auth.mjs"],
+  "sourcesContent": ["\n/**\n * osmAuth\n * Easy authentication with OpenStreetMap over OAuth 2.0.\n * @module\n *\n * @param    o   `Object` containing options:\n * @param    o.scope          OAuth2 scopes requested (e.g. \"read_prefs write_api\")\n * @param    o.client_id      OAuth2 client ID\n * @param    o.redirect_uri   OAuth2 redirect URI (e.g. \"http://127.0.0.1:8080/land.html\")\n * @param    o.access_token   Can pre-authorize with an OAuth2 bearer token if you have one\n * @param    o.apiUrl         A base url for the OSM API (default: \"https://api.openstreetmap.org\")\n * @param    o.url            A base url for the OAuth2 handshake (default: \"https://www.openstreetmap.org\")\n * @param    o.auto           If `true`, attempt to authenticate automatically when calling `.xhr()` or `.fetch()` (default: `false`)\n * @param    o.singlepage     If `true`, use page redirection instead of a popup (default: `false`)\n * @param    o.loading        Function called when auth-related xhr calls start\n * @param    o.done           Function called when auth-related xhr calls end\n * @return  `self`\n */\nexport function osmAuth(o) {\n  var oauth = {};\n\n  // Mock localStorage if needed.\n  // Note that accessing localStorage may throw a `SecurityError`, so wrap in a try/catch.\n  var _store = null;\n  try {\n    _store = window.localStorage;\n  } catch (e) {\n    var _mock = new Map();\n    _store = {\n      isMocked: true,\n      hasItem: (k) => _mock.has(k),\n      getItem: (k) => _mock.get(k),\n      setItem: (k, v) => _mock.set(k, v),\n      removeItem: (k) => _mock.delete(k),\n      clear: () => _mock.clear()\n    };\n  }\n\n  /**\n   * token\n   * Get/Set tokens. These are prefixed with the base URL so that `osm-auth`\n   * can be used with multiple APIs and the keys in `localStorage` will not clash\n   * @param  {string}   k  key\n   * @param  {string?}  v  value\n   * @return {string?}  If getting, returns the stored value or `null`.  If setting, returns `undefined`.\n   */\n  function token(k, v) {\n    if (arguments.length === 1) return _store.getItem(o.url + k);\n    else if (arguments.length === 2) return _store.setItem(o.url + k, v);\n  }\n\n\n  /**\n   * authenticated\n   * Test whether the user is currently authenticated\n   *\n   * @return {boolean} `true` if authenticated, `false` if not\n   */\n  oauth.authenticated = function() {\n    return !!token('oauth2_access_token');\n  };\n\n\n  /**\n   * logout\n   * Removes any stored authentication tokens (legacy OAuth1 tokens too)\n   *\n   * @return  `self`\n   */\n  oauth.logout = function () {\n    token('oauth2_access_token', '');         // OAuth2\n    token('oauth_token', '');                 // OAuth1\n    token('oauth_token_secret', '');          // OAuth1\n    token('oauth_request_token_secret', '');  // OAuth1\n    return oauth;\n  };\n\n\n  /**\n   * authenticate\n   * First logs out, then runs the authentiation flow, finally calls the callback.\n   * TODO: detect lack of click event  (probably can settimeout it)\n   *\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.authenticate = function(callback) {\n    if (oauth.authenticated()) {\n      callback(null, oauth);\n      return;\n    }\n\n    oauth.logout();\n\n    _preopenPopup(function(error, popup) {\n      if (error) {\n        callback(error);\n      } else {\n        _generatePkceChallenge(function(pkce) {\n          _authenticate(pkce, popup, callback);\n        });\n      }\n    });\n  };\n\n\n  /**\n   * authenticateAsync\n   * Promisified version of `authenticate`\n   * @return  {Promise}  Promise settled with whatever `_authenticate` did\n   */\n  oauth.authenticateAsync = function() {\n    if (oauth.authenticated()) {\n      return Promise.resolve(oauth);\n    }\n\n    oauth.logout();\n\n    return new Promise((resolve, reject) => {\n      var errback = (err, result) => {\n        if (err) {\n          reject(err);\n        } else {\n          resolve(result);\n        }\n      };\n\n      _preopenPopup((error, popup) => {\n        if (error) {\n          errback(error);\n        } else {\n          _generatePkceChallenge(pkce => _authenticate(pkce, popup, errback));\n        }\n      });\n    });\n  };\n\n\n  /**\n   * opens an empty popup to be later used for the authentication page\n   * @param   {function}  callback  Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  function _preopenPopup(callback) {\n    if (o.singlepage) {\n      callback(null, undefined);\n      return;\n    }\n\n    // Create a 550x610 popup window in the center of the screen\n    var w = 550;\n    var h = 610;\n    var settings = [\n        ['width', w],\n        ['height', h],\n        ['left', window.screen.width / 2 - w / 2],\n        ['top', window.screen.height / 2 - h / 2],\n      ]\n      .map(function (x) { return x.join('='); })\n      .join(',');\n    var popup = window.open('about:blank', 'oauth_window', settings);\n    if (popup) {\n      callback(null, popup);\n    } else {\n      var error = new Error('Popup was blocked');\n      error.status = 'popup-blocked';\n      callback(error);\n    }\n  }\n\n\n  /**\n   * _authenticate\n   * internal authenticate\n   *\n   * @param  {Object}    pkce      Object containing PKCE code challenge properties\n   * @param  {Window}    popup     Popup Window to use for the authentication page, should be undefined when using singlepage mode\n   * @param  {function}  callback  Errback-style callback that accepts `(err, result)`\n   */\n  function _authenticate(pkce, popup, callback) {\n    var state = generateState();\n\n    // ## Request authorization to access resources from the user\n    // and receive authorization code\n    var url =\n      o.url +\n      '/oauth2/authorize?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        response_type: 'code',\n        scope: o.scope,\n        state: state,\n        code_challenge: pkce.code_challenge,\n        code_challenge_method: pkce.code_challenge_method,\n      });\n\n    if (o.singlepage) {\n      if (_store.isMocked) {\n        // in singlepage mode, PKCE requires working non-volatile storage\n        var error = new Error('localStorage unavailable, but required in singlepage mode');\n        error.status = 'pkce-localstorage-unavailable';\n        callback(error);\n        return;\n      }\n      var params = utilStringQs(window.location.search.slice(1));\n      if (params.code) {\n        oauth.bootstrapToken(params.code, callback);\n      } else {\n        // save OAuth2 state and PKCE challenge in local storage, for later use\n        // in the `/oauth/token` request\n        token('oauth2_state', state);\n        token('oauth2_pkce_code_verifier', pkce.code_verifier);\n        window.location = url;\n      }\n    } else {\n      oauth.popupWindow = popup;\n      popup.location = url;\n    }\n\n    // Called by a function in the redirect URL page, in the popup window. The\n    // window closes itself.\n    window.authComplete = function (url) {\n      var params = utilStringQs(url.split('?')[1]);\n      if (params.state !== state) {\n        error = new Error('Invalid state');\n        error.status = 'invalid-state';\n        callback(error);\n        return;\n      }\n      _getAccessToken(params.code, pkce.code_verifier, accessTokenDone);\n      delete window.authComplete;\n    };\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  }\n\n\n  /**\n   * _getAccessToken\n   * The client requests an access token by authenticating with the\n   * authorization server and presenting the `auth_code`, brought\n   * in from a function call on a landing page popup.\n   * @param  {string}    auth_code\n   * @param  {string}    code_verifier\n   * @param  {function}  accessTokenDone  Errback-style callback `(err, result)`, called when complete\n   */\n  function _getAccessToken(auth_code, code_verifier, accessTokenDone) {\n    var url =\n      o.url +\n      '/oauth2/token?' +\n      utilQsString({\n        client_id: o.client_id,\n        redirect_uri: o.redirect_uri,\n        grant_type: 'authorization_code',\n        code: auth_code,\n        code_verifier: code_verifier\n      });\n\n    // The authorization server authenticates the client and validates\n    // the authorization grant, and if valid, issues an access token.\n    oauth.rawxhr('POST', url, null, null, null, accessTokenDone);\n    o.loading();\n  }\n\n\n  /**\n   * bringPopupWindowToFront\n   * Tries to bring an existing authentication popup to the front.\n   *\n   * @return {boolean} `true` if it succeeded, `false` if not\n   */\n  oauth.bringPopupWindowToFront = function() {\n    var broughtPopupToFront = false;\n    try {\n      // This may cause a cross-origin error:\n      // `DOMException: Blocked a frame with origin \"...\" from accessing a cross-origin frame.`\n      if (oauth.popupWindow && !oauth.popupWindow.closed) {\n        oauth.popupWindow.focus();\n        broughtPopupToFront = true;\n      }\n    } catch (err) {\n      // Bringing popup window to front failed (probably because of the cross-origin error mentioned above)\n    }\n    return broughtPopupToFront;\n  };\n\n\n  /**\n   * bootstrapToken\n   * The authorization code is a temporary code that a client can exchange for an access token.\n   * If using this library in single-page mode, you'll need to call this once your application\n   * has an `auth_code` and wants to get an access_token.\n   *\n   * @param   {string}   auth_code  The OAuth2 `auth_code`\n   * @param   {function} callback   Errback-style callback `(err, result)`, called when complete\n   * @return  none\n   */\n  oauth.bootstrapToken = function(auth_code, callback) {\n    var state = token('oauth2_state');\n    token('oauth2_state', '');\n    var params = utilStringQs(window.location.search.slice(1));\n    if (params.state !== state) {\n      var error = new Error('Invalid state');\n      error.status = 'invalid-state';\n      callback(error);\n      return;\n    }\n    var code_verifier = token('oauth2_pkce_code_verifier');\n    token('oauth2_pkce_code_verifier', '');\n    _getAccessToken(auth_code, code_verifier, accessTokenDone);\n\n    function accessTokenDone(err, xhr) {\n      o.done();\n      if (err) {\n        callback(err);\n        return;\n      }\n      var access_token = JSON.parse(xhr.response);\n      token('oauth2_access_token', access_token.access_token);\n      callback(null, oauth);\n    }\n  };\n\n\n  /**\n   * fetch\n   * A `fetch` wrapper that includes the Authorization header if the user is authenticated.\n   * https://developer.mozilla.org/en-US/docs/Web/API/fetch\n   *\n   * @param  {string}   resource    Resource passed to `fetch`\n   * @param  {Object}   options     Options passed to `fetch`\n   * @return {Promise}  Promise that wraps `authenticateAsync` then `fetch`\n   */\n  oauth.fetch = function(resource, options) {\n    if (oauth.authenticated()) {\n      return _doFetch();\n    } else {\n      if (o.auto) {\n        return oauth.authenticateAsync().then(_doFetch);\n      } else {\n        return Promise.reject(new Error('not authenticated'));\n      }\n    }\n\n    function _doFetch() {\n      options = options || {};\n      if (!options.headers) {\n        options.headers = { 'Content-Type': 'application/x-www-form-urlencoded' };\n      }\n      options.headers.Authorization = 'Bearer ' + token('oauth2_access_token');\n      return fetch(resource, options);\n    }\n  };\n\n\n  /**\n   * xhr\n   * A `XMLHttpRequest` wrapper that does authenticated calls if the user has logged in.\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param   {Object} options\n   * @param    options.method   Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    options.prefix   If `true` path contains a path, if `false` path contains the full url\n   * @param    options.path     The URL path (e.g. \"/api/0.6/user/details\") (or full url, if `prefix`=`false`)\n   * @param    options.content  Passed to `xhr.send`\n   * @param    options.headers  `Object` containing request headers\n   * @param   {function}         callback  Errback-style callback `(err, result)`, called when complete\n   * @return  {XMLHttpRequest}  `XMLHttpRequest` if authenticated, otherwise `null`\n   */\n  oauth.xhr = function (options, callback) {\n    if (oauth.authenticated()) {\n      return _doXHR();\n    } else {\n      if (o.auto) {\n        oauth.authenticate(_doXHR);\n        return;\n      } else {\n        callback('not authenticated', null);\n        return;\n      }\n    }\n\n    function _doXHR() {\n      var url = options.prefix !== false ? (o.apiUrl + options.path) : options.path;\n      return oauth.rawxhr(\n        options.method,\n        url,\n        token('oauth2_access_token'),\n        options.content,\n        options.headers,\n        done\n      );\n    }\n\n    function done(err, xhr) {\n      if (err) {\n        callback(err);\n      } else if (xhr.responseXML) {\n        callback(err, xhr.responseXML);\n      } else {\n        callback(err, xhr.response);\n      }\n    }\n  };\n\n\n  /**\n   * rawxhr\n   * Creates the XMLHttpRequest set up with a header and response handling\n   * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n   *\n   * @param    method         Passed to `xhr.open`  (e.g. 'GET', 'POST')\n   * @param    url            Passed to `xhr.open`\n   * @param    access_token   OAuth2 bearer token\n   * @param    data           Passed to `xhr.send`\n   * @param    headers        `Object` containing request headers\n   * @param    callback       An \"errback\"-style callback (`err`, `result`), called when complete\n   * @return  `XMLHttpRequest`\n   */\n  oauth.rawxhr = function(method, url, access_token, data, headers, callback) {\n    headers = headers || { 'Content-Type': 'application/x-www-form-urlencoded' };\n\n    if (access_token) {\n      headers.Authorization = 'Bearer ' + access_token;\n    }\n\n    var xhr = new XMLHttpRequest();\n\n    xhr.onreadystatechange = function () {\n      if (4 === xhr.readyState && 0 !== xhr.status) {\n        if (/^20\\d$/.test(xhr.status)) {   // a 20x status code - OK\n          callback(null, xhr);\n        } else {\n          callback(xhr, null);\n        }\n      }\n    };\n    xhr.onerror = function (e) {\n      callback(e, null);\n    };\n\n    xhr.open(method, url, true);\n    for (var h in headers) xhr.setRequestHeader(h, headers[h]);\n\n    xhr.send(data);\n    return xhr;\n  };\n\n\n  /**\n   * preauth\n   * Pre-authorize this object, if we already have access token from the start\n   *\n   * @param   {Object}  val  Object containing `access_token` property\n   * @return  `self`\n   */\n  oauth.preauth = function(val) {\n    if (val && val.access_token) {\n      token('oauth2_access_token', val.access_token);\n    }\n    return oauth;\n  };\n\n\n  /**\n   * options  (getter / setter)\n   * If passed with no arguments, just return the options\n   * If passed an Object, set the options then attempt to pre-authorize\n   *\n   * @param   val?   Object containing options\n   * @return  current `options` (if getting), or `self` (if setting)\n   */\n  oauth.options = function(val) {\n    if (!arguments.length) return o;\n\n    o = val;\n    o.apiUrl = o.apiUrl || 'https://api.openstreetmap.org';\n    o.url = o.url || 'https://www.openstreetmap.org';\n    o.auto = o.auto || false;\n    o.singlepage = o.singlepage || false;\n\n    // Optional loading and loading-done functions for nice UI feedback.\n    // by default, no-ops\n    o.loading = o.loading || function () {};\n    o.done = o.done || function () {};\n    return oauth.preauth(o);\n  };\n\n\n  // Everything below here is initialization/setup code\n  // Handle options and attempt to pre-authorize\n  oauth.options(o);\n\n  return oauth;\n}\n\n\n/**\n * utilQsString\n * Transforms object of `key=value` pairs into query string\n * @param   {Object}  Object of `key=value` pairs\n * @returns {string}  query string\n */\nfunction utilQsString(obj) {\n  return Object.keys(obj)\n    .filter(function(key) {\n      return obj[key] !== undefined;\n    })\n    .sort()\n    .map(function(key) {\n      return (encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));\n    })\n    .join('&');\n}\n\n/**\n * utilStringQs\n * Transforms query string into object of `key=value` pairs\n * @param   {string}  query string\n * @returns {Object}  Object of `key=value` pairs\n */\nfunction utilStringQs(str) {\n  var i = 0; // advance past any leading '?' or '#' characters\n  while (i < str.length && (str[i] === '?' || str[i] === '#')) i++;\n  str = str.slice(i);\n\n  return str.split('&').reduce(function(obj, pair) {\n    var parts = pair.split('=');\n    if (parts.length === 2) {\n      obj[parts[0]] = decodeURIComponent(parts[1]);\n    }\n    return obj;\n  }, {});\n}\n\n\n/**\n * supportsWebCryptoAPI\n * https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API\n * @returns {boolean}  `true` if WebCryptoAPI is available\n */\nfunction supportsWebCryptoAPI() {\n  return window && window.crypto\n    && window.crypto.getRandomValues\n    && window.crypto.subtle\n    && window.crypto.subtle.digest;\n}\n\n\n/**\n * Generates a challenge/verifier pair for PKCE.\n * If the browser does not support the WebCryptoAPI, the \"plain\" method is\n * used as a fallback instead of a SHA-256 hash.\n * @param {callback} callback called with the result of the generated PKCE challenge\n */\nfunction _generatePkceChallenge(callback) {\n  var code_verifier;\n  if (supportsWebCryptoAPI()) {\n    // generate a random code_verifier\n    // https://datatracker.ietf.org/doc/html/rfc7636#section-7.1\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    code_verifier = base64(random.buffer);\n    var verifier = Uint8Array.from(Array.from(code_verifier).map(function(char) {\n      return char.charCodeAt(0);\n    }));\n\n    // generate challenge for code verifier\n    window.crypto.subtle.digest('SHA-256', verifier).then(function(hash) {\n      var code_challenge = base64(hash);\n\n      callback({\n        code_challenge: code_challenge,\n        code_verifier: code_verifier,\n        code_challenge_method: 'S256'\n      });\n    });\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    code_verifier = '';\n    for (var i=0; i<64; i++) {\n      code_verifier += chars[Math.floor(Math.random() * chars.length)];\n    }\n    callback({\n      code_verifier: code_verifier,\n      code_challenge: code_verifier,\n      code_challenge_method: 'plain',\n    });\n  }\n}\n\n\n/**\n * Returns a random state to be used as the \"state\" of the OAuth2 authentication\n * See https://datatracker.ietf.org/doc/html/rfc6749#section-10.12\n */\nfunction generateState() {\n  var state;\n  if (supportsWebCryptoAPI()) {\n    var random = window.crypto.getRandomValues(new Uint8Array(32));\n    state = base64(random.buffer);\n  } else {\n    // browser does not support Web Crypto API (e.g. IE11) -> fall back to \"plain\" method\n    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n    state = '';\n    for (var i=0; i<64; i++) {\n      state += chars[Math.floor(Math.random() * chars.length)];\n    }\n  }\n  return state;\n}\n\n\n/**\n * base64\n * Converts binary buffer to base64 encoded string, as used in rfc7636\n * @param    {ArrayBuffer}  buffer\n * @returns  {string}       base64 encoded\n */\nfunction base64(buffer) {\n  return btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)))\n    .replace(/\\//g, '_')\n    .replace(/\\+/g, '-')\n    .replace(/[=]/g, '');\n}\n"],
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+  "names": ["osm_auth_exports", "__export", "osmAuth", "o", "oauth", "_store", "e", "_mock", "k", "v", "token", "callback", "_preopenPopup", "error", "popup", "_generatePkceChallenge", "pkce", "_authenticate", "resolve", "reject", "errback", "err", "result", "w", "h", "settings", "x", "state", "generateState", "url", "utilQsString", "params", "utilStringQs", "_getAccessToken", "accessTokenDone", "xhr", "access_token", "auth_code", "code_verifier", "broughtPopupToFront", "resource", "options", "_doFetch", "_doXHR", "done", "method", "data", "headers", "val", "obj", "key", "str", "i", "pair", "parts", "supportsWebCryptoAPI", "random", "base64", "verifier", "char", "hash", "code_challenge", "chars", "buffer"]
 }
diff --git a/package.json b/package.json
index d0cf8d3..7e02dc3 100644
--- a/package.json
+++ b/package.json
@@ -35,9 +35,6 @@
     "test": "run-s build test:node",
     "test:node": "c8 node --test test/"
   },
-  "dependencies": {
-    "store": "~2.0.12"
-  },
   "devDependencies": {
     "c8": "^9.0.0",
     "esbuild": "^0.19.11",
diff --git a/src/osm-auth.mjs b/src/osm-auth.mjs
index 877a52e..8f391d9 100644
--- a/src/osm-auth.mjs
+++ b/src/osm-auth.mjs
@@ -1,5 +1,3 @@
-import store from 'store';
-
 
 /**
  * osmAuth
@@ -22,6 +20,37 @@ import store from 'store';
 export function osmAuth(o) {
   var oauth = {};
 
+  // Mock localStorage if needed.
+  // Note that accessing localStorage may throw a `SecurityError`, so wrap in a try/catch.
+  var _store = null;
+  try {
+    _store = window.localStorage;
+  } catch (e) {
+    var _mock = new Map();
+    _store = {
+      isMocked: true,
+      hasItem: (k) => _mock.has(k),
+      getItem: (k) => _mock.get(k),
+      setItem: (k, v) => _mock.set(k, v),
+      removeItem: (k) => _mock.delete(k),
+      clear: () => _mock.clear()
+    };
+  }
+
+  /**
+   * token
+   * Get/Set tokens. These are prefixed with the base URL so that `osm-auth`
+   * can be used with multiple APIs and the keys in `localStorage` will not clash
+   * @param  {string}   k  key
+   * @param  {string?}  v  value
+   * @return {string?}  If getting, returns the stored value or `null`.  If setting, returns `undefined`.
+   */
+  function token(k, v) {
+    if (arguments.length === 1) return _store.getItem(o.url + k);
+    else if (arguments.length === 2) return _store.setItem(o.url + k, v);
+  }
+
+
   /**
    * authenticated
    * Test whether the user is currently authenticated
@@ -168,9 +197,9 @@ export function osmAuth(o) {
       });
 
     if (o.singlepage) {
-      if (!store.enabled) {
+      if (_store.isMocked) {
         // in singlepage mode, PKCE requires working non-volatile storage
-        var error = new Error('local storage unavailable, but require in singlepage mode');
+        var error = new Error('localStorage unavailable, but required in singlepage mode');
         error.status = 'pkce-localstorage-unavailable';
         callback(error);
         return;
@@ -470,25 +499,6 @@ export function osmAuth(o) {
 
 
   // Everything below here is initialization/setup code
-
-  // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-  // can be used with multiple APIs and the keys in `localStorage`
-  // will not clash
-  var token;
-
-  if (store.enabled) {
-    token = function (x, y) {
-      if (arguments.length === 1) return store.get(o.url + x);
-      else if (arguments.length === 2) return store.set(o.url + x, y);
-    };
-  } else {
-    var storage = {};
-    token = function (x, y) {
-      if (arguments.length === 1) return storage[o.url + x];
-      else if (arguments.length === 2) return (storage[o.url + x] = y);
-    };
-  }
-
   // Handle options and attempt to pre-authorize
   oauth.options(o);
 
@@ -623,4 +633,4 @@ function base64(buffer) {
     .replace(/\//g, '_')
     .replace(/\+/g, '-')
     .replace(/[=]/g, '');
-}
\ No newline at end of file
+}