The WeakSet is supposed to store elements by weak reference. That is, if an object is not referenced by anything else, it should be cleaned from the WeakSet.  I have written the following test:  var weakset = new WeakSet(),     numbers = [1, 2, 3];...
I'm trying to fiddle with Ecmascript 6 modules using webpack + traceur to transpile to ES5 CommonJS, but I'm having trouble successfully unit testing them.  I tried using Jest + traceur preprocessor, but the automocking and dependency names s...
I try to use ecmascript 6 modules system for first time. I use traceur compiler. Given two es6 files:  // app.js  export function row() {     alert('row'); }  // init.js import { row } from 'public_js/app'; row();   Traceur (I use gru...
A project I'm working on has IE8 as a hard requirement. We would like to potentially use Traceur to start working with some of ES6's improved syntax, but I'm aware that it produces ES5, which is not supported by IE8. Given that I can patc...
I have a small static project written in ES6. It's compiled with Traceur dynamically every reload (for development purposes):  <script src="lib/traceur/traceur.js" type="text/javascript"></script> <script src="l...
I am trying to display a button with ripple using material design lite but getting the following error:     app.js:3 Uncaught (in promise) TypeError: $ is not a function(…)   html file:    <body>       <script> System.paths['jquery&...
Why do I have to use the .js extension to import es6 module with systemjs? For instance:  import { multiplier } from "adder.js"; // ok import { double, square } from 'modules'; // error  var timesTwo = multiplier(2);  console.log(time...
When I cloned and build traceur I got 2 files installed: traceur.js and traceur-runtime.js.  The traceur docs(specifically) here won't really explain the difference between the traceur.js and traceur-runtime.js.  I know that traceur.js contains t...

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