traceur-compiler

• Cleanup generated code for export default declaration
• Setup module.exports first

This fixes the broken dist/commonjs of 0.0.109

• CJS: Module exports should be enumerable
• Top level this in modules should be undefined
• Allow the runtime to be imported as modules using --import-runtime

• Move Proper Tail Calls runtime into individual modules. ie. require('traceur/dist/commonjs/runtime/modules/call.js')

• bin/BrowserSystem.js includes compiler, polyfills, System, and WebPageTranscoder. Read traceurOptions attribute from <script type=module traceurOptions="--asyncFunctions">.

• Allow compiling async functions to generators. This is done by setting --async-functions --generators=parse.

• Fix issue where we did not allow declarations to shadow the function expression name.
• Implement Spread Properties. This add support for ... in object literals which is currently at stage 2.

var x = {a: 1};
var y = {...a, b: 2};  // {a: 1, b: 2}

• JSX: Fix assignment expression parsing in place holders.
• JSX: Fix whitespace and escaping of attribute values.

• Upgrade semver to 4.3.3

• Move runtime into modules. This is in preparation for allowing importing the runtime as
  modules in the future.
• JSX: Tag name starting with an uppercase should use identifier. <Abc/> should generate React.createElement(Abc, null) and not React.createElement('Abc', null).
• JSX: Support boolean shorthand attributes. <a b/> is short for <a b={true}/>.
• JSX: Add support for JSXSpreadAttribute. This allows spreading an object into props/attributes:

<p a='a' {...{b: 1, c: 2}}/>
// same as (except the expansion happens at runtime)
<p a='a' b={1} c={2}/>

• Update commander and glob dependencies.

• Fix release

• Make sure we do not clobber a pre existing System object.
• Use a context argument in System.register
• Add commonjs versions of the src in dist/commonjs/. This making reusing core Traceur modules easier from projects such as es module loader:

require('traceur/bin/traceur-runtime.js');
var Parser = require('traceur/dist/commonjs/syntax/Parser.js').Parser;
...

• Lots of refactoring related to traceur runtime.
• Add support for import type and make sure the import/export validation works.
• Implement __moduleName second argument to System.register.

• Add support for TypeAliasDeclaration. This adds support for TypeScript/Flow's type alias declaration:

type NumberArray = Array<number>;

• Basic JSX parsing support. The option to turn this on is called jsx. You can provide your own
  function to call by setting this option to a string. --jsx=my.func.
  If not set it defaults to React.createElement.
• Remove type-assertions option. It was never fully implemented...
• Add --modules=parse output option. This allows outputting ES6 module syntax.
• Basic polyfill for WeakMap/WeakSet.
• Support IdentifierName in extended export. The following is now valid:

// Options: --export-from-extended
export new from './file.js';

• Fix issue where we added initializers to for in vars.
• Only conditionally override Object.keys and Object.getOwnPropertyNames if there is no native support for Symbol.

• Fix issue with regular expressions. Regular expressions starting with /=* was not parsed correctly.
• Fix arrow functions in derived class constructors

• Add tool for printing dependencies
• Improve performance for bulk exports when using --modules=instantiate
• Add super support to object literals
• Fix issue with parens and arrow functions (#1962)
• Fix issue with let/const in while/do-while (#1970)
• Remove extra use strict directive from modules (#1973)
• Renamed some AST class names. See commits for details.