add browser testing using karma - as some SVG features can't be easily testing in jsdom environment

Author: mzusin

README.md

@@ -2,4 +2,84 @@
 
 ![GitHub package.json version](https://img.shields.io/github/package-json/v/mzusin/mz-svg)
 
-The TypeScript-based library for manipulating and animating SVG.
+The TypeScript-based library for manipulating and animating SVG.
+
+## Table of contents
+- [TypeScript Usage](#typescript-usage)
+- [Browser Usage](#browser-usage)
+- [Node.js Usage](#nodejs-usage)
+
+## TypeScript Usage
+
+To use the library with TypeScript, you need to install the module from npm:
+
+```
+npm install mz-svg
+```
+
+The import any function like **v2Sum**:
+```js
+import { v2Sum, Vector2 } from 'mz-svg';
+
+const v1: Vector2 = [1, 2];
+const v2: Vector2 = [3, 4];
+const sum = v2Sum(v1, v2); // [4, 6]
+```
+
+-----------------------------------------------
+
+## Browser Usage
+
+Any function can also be used in the browser using the **mz-svg.min.js** file. All functions are located in the **mzSVG** namespace:
+
+```html
+<script src="mz-svg.min.js"></script>
+<script>
+    const sum = mzSVG.v2Sum([1, 2], [3, 4]);
+    console.log(sum);
+</script>
+```
+
+The library is also available on the [jsDelivr CND](https://www.jsdelivr.com/package/npm/mz-svg):
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/mzusin/dist/mz-svg.min.js"></script>
+<script>
+    const sum = mzSVG.v2Sum([1, 2], [3, 4]);
+    console.log(sum);
+</script>
+```
+-----------------------------------------------
+
+## Node.js Usage
+
+The library can also be used in Node.js.
+
+```
+npm install mz-svg
+```
+
+```js
+const { setDecimalPlaces } = require('mz-svg/dist/mz-svg.node.cjs');
+
+const rounded = setDecimalPlaces(Math.PI, 2);
+console.log(rounded);
+```
+
+-----------------------------------------------
+
+## Constants
+
+The library has the following constants that can be used externally:
+
+- SVG_NAMESPACE
+- XMLNS_NAMESPACE
+
+```js
+import { SVG_NAMESPACE, XMLNS_NAMESPACE } from 'mz-svg';
+
+console.log(SVG_NAMESPACE); // 'http://www.w3.org/2000/svg';
+console.log(XMLNS_NAMESPACE); // 'http://www.w3.org/2000/xmlns/';
+```
+
+-----------------------------------------------

dist/index.d.ts

@@ -1,6 +1,9 @@
 declare module 'mz-svg' {
 
+    export const SVG_NAMESPACE = "http://www.w3.org/2000/svg";
+    export const XMLNS_NAMESPACE = "http://www.w3.org/2000/xmlns/";
+
     // export type Vector2 = [number, number];
 
-    // export const vSum: (vector1: Vector, vector2: Vector, decimalPlaces?: number) => Vector;
+    export const createSVG: (width: number, height: number) => SVGSVGElement;
 }

karma.conf.cjs

@@ -0,0 +1,75 @@
+const path = require('path');
+
+module.exports = function(config) {
+  config.set({
+
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: '',
+
+
+    // frameworks to use
+    // available frameworks: https://www.npmjs.com/search?q=keywords:karma-adapter
+    frameworks: [
+      'qunit', // https://www.npmjs.com/package/karma-qunit
+    ],
+    plugins: [
+      'karma-qunit',
+      'karma-chrome-launcher',
+      'karma-spec-reporter',
+    ],
+
+    // list of files / patterns to load in the browser
+    files: [
+      path.join(__dirname, './dist/mz-svg.min.js'),
+      './test-browser/helpers/*.js',
+      './test-browser/modules/**/*.test.js',
+      // './test-browser/index.html',
+    ],
+
+    // list of files / patterns to exclude
+    exclude: [
+    ],
+
+    // preprocess matching files before serving them to the browser
+    // available preprocessors: https://www.npmjs.com/search?q=keywords:karma-preprocessor
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://www.npmjs.com/search?q=keywords:karma-reporter
+    reporters: [
+      // 'progress',
+      'spec',
+    ],
+
+
+    // web server port
+    port: 9876,
+
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_INFO,
+
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+
+    // start these browsers
+    // available browser launchers: https://www.npmjs.com/search?q=keywords:karma-launcher
+    browsers: ['ChromeHeadless'],
+
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: false,
+
+    // Concurrency level
+    // how many browser instances should be started simultaneously
+    concurrency: Infinity
+  })
+}