Added unregister trigger support

src/moveTo.js

@@ -87,6 +87,7 @@ const MoveTo = (() => {
    * Register a dom element as trigger
    * @param  {HTMLElement} dom Dom trigger element
    * @param  {function} callback Callback function
+   * @return {function|void} unregister function
    */
   MoveTo.prototype.registerTrigger = function(dom, callback) {
     if (!dom) {
@@ -104,10 +105,14 @@ const MoveTo = (() => {
       options.callback = callback;
     }
 
-    dom.addEventListener('click', (e) => {
+    const listener = (e) => {
       e.preventDefault();
       this.move(target, options);
-    });
+    };
+
+    dom.addEventListener('click', listener, false);
+
+    return () => dom.removeEventListener('click', listener, false);
   };
 
   /**

tests/moveTo-spec.js

@@ -18,6 +18,9 @@ function createMockDomElement(options) {
     offsetParent: null,
     addEventListener: function(event, cb) {
       this._listeners[event] = cb;
+    },
+    removeEventListener: function(event, cb) {
+      delete this._listeners[event];
     }
   };
 }
@@ -65,15 +68,23 @@ test('It should change options', (t) => {
 
 test('It should register trigger', (t) => {
   const instance = new MoveTo();
-
   const elem = createMockDomElement({});
-  t.is(elem._listeners['click'], undefined);
 
   instance.registerTrigger(elem);
 
   t.true(typeof elem._listeners['click'] === 'function');
 });
 
+test('It should unregister trigger', (t) => {
+  const instance = new MoveTo();
+  const elem = createMockDomElement({});
+  const unregister = instance.registerTrigger(elem);
+
+  t.true(typeof elem._listeners['click'] === 'function');
+  unregister();
+  t.true(typeof elem._listeners['click'] === 'undefined');
+});
+
 test('It should add custom ease function', (t) => {
   const inst = new MoveTo();
   const elem = createMockDomElement({});