v6.19.0 changelog [skip ci] (#4846)

CHANGELOG.md

@@ -13,6 +13,242 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
  
+## v6.19.0 (2016-11-16)
+
+#### :rocket: New Feature
+* `babel-plugin-transform-object-rest-spread`
+  * [#4755](https://github.com/babel/babel/pull/4755) Make the plugin work standalone with parameters/destructuring plugins. ([@hzoo](https://github.com/hzoo))
+
+This rewrite fixes a long standing issue where the object-rest-spread plugin was depending on 2 other plugins to compile `RestProperty`. This is important given the assumption that plugins should be independent and is vital for the use of [babel-preset-env](https://github.com/babel/babel-preset-env/) since new environments support destructuring natively.
+
+*RestProperty*
+
+- [x] Parameters
+``` js
+function a({ b, ...c }) {}
+```
+- [x] VariableDeclaration
+```js
+const { a, ...b } = c;
+```
+- [x] ExportNamedDeclaration
+```js
+export var { a, ...b } = c;
+```
+- [x] CatchClause
+```js
+try {} catch ({a, ...b}) {}
+```
+- [x] AssignmentExpression
+```js
+({a, ...b} = c);
+```
+- [x] ForXStatement
+```js
+for ({a, ...b} of []) {}
+```
+
+*SpreadProperty*
+
+- [x] ObjectExpression
+```js
+var a = { ...b, ...c }
+```
+
+* `babel-plugin-transform-class-properties`
+  * [#4544](https://github.com/babel/babel/pull/4544) Greater spec compliance for class properties with the new `spec` option. ([@motiz88](https://github.com/motiz88))
+
+Usage
+```js
+{
+  "plugins": [
+    ["transform-class-properties", {
+      "spec": true
+    }]
+  ]
+}
+```
+
+- Class properties are compiled to use `Object.defineProperty`
+- Static fields are now defined even if they are not initialized
+
+In
+```js
+class Foo {
+  static bar;
+}
+```
+
+Out
+```js
+var Foo = function Foo() {
+  babelHelpers.classCallCheck(this, Foo);
+};
+
+Object.defineProperty(Foo, "bar", {
+  enumerable: true,
+  writable: true,
+  value: undefined
+});
+```
+* `babel-traverse`
+  * [#4836](https://github.com/babel/babel/pull/4836) Add path utilities `isAncestor` and `isDescendant`. ([@boopathi](https://github.com/boopathi))
+
+We've added 2 similar "ancestry" path methods to `path.findParent`:
+
+`path.isAncestor`/`path.isDescenant`
+
+Usage:
+```js
+let programPath, numberPath;
+traverse(ast, {
+  Program(path) { programPath = path; },
+  NumberPath(path) { numberPath = path; },
+});
+
+programPath.isAncestor(numberPath); // true
+numberPath.isDescendant(programPath); // true
+```
+
+  * [#4835](https://github.com/babel/babel/pull/4835) Add `clearCache` and `clearPath` as separate APIs under traverse. ([@boopathi](https://github.com/boopathi))
+
+Usage:
+```js
+traverse.clearCache(); // clears both path's and scope cache
+traverse.clearCache.clearPath();
+traverse.clearCache.clearScope();
+```
+
+* `babel-generator`
+  * [#4827](https://github.com/babel/babel/pull/4827) Add `jsonCompatibleStrings` option to generator. ([@kangax](https://github.com/kangax))
+
+Usage:
+```js
+{
+  "generatorOpts": {
+    "jsonCompatibleStrings": true // defaults to false
+  }
+}
+```
+
+Set to true for the generator to use `jsesc` with `"json": true`. This will make it print `"\u00A9"` vs. `"©"`;
+
+  * [#3547](https://github.com/babel/babel/pull/3547) Added `flowUsesCommas` option for object types. ([@sampepose](https://github.com/sampepose))
+
+Usage:
+```js
+{
+  "generatorOpts": {
+    "flowCommaSeparator": true // defaults to false
+  }
+}
+```
+
+Currently there are 2 supported syntaxes (`,` and `;`) in Flow Object Types. The use of commas is in line with the more popular style and matches how objects are defined in Javascript, making it a bit more natural to write.
+
+```js
+var a: { param1: number; param2: string }
+var a: { param1: number, param2: string }
+```
+
+* `babel-types`
+  * [#3553](https://github.com/babel/babel/pull/3553) Start babel-types tests, add `isNodesEquivalent`. ([@hzoo](https://github.com/hzoo))
+
+`t.isNodesEquivalent`
+
+Usage:
+
+```js
+assert(t.isNodesEquivalent(parse("1 + 1"), parse("1+1")) === true);
+```
+
+* `babel-plugin-transform-es2015-modules-systemjs`
+  * [#4789](https://github.com/babel/babel/pull/4789) Support `import()` as contextual import in system module format. ([@guybedford](https://github.com/guybedford))
+
+Support stage-2 `import()` in systemjs.
+
+It does not compile by default; you'll want to add the stage-2 preset or explicitly include `babel-plugin-syntax-dynamic-import`.
+
+```js
+export function lazyLoadOperation () {
+  return import('./x')
+  .then(function (x) {
+    x.y();
+  });
+}
+```
+
+#### :bug: Bug Fix
+* `babel-generator`
+  * [#4830](https://github.com/babel/babel/pull/4830) Bug fix for printing minified literals. ([@shinew](https://github.com/shinew))
+
+Will print the shorter of the `NumericLiteral`s if using the `minified` option.
+
+Input
+```js
+5e1;
+5e4;
+```
+
+Output
+```js
+50;
+5e4;
+```
+
+* `babel-plugin-transform-es2015-modules-systemjs`
+  * [#4832](https://github.com/babel/babel/pull/4832) Fix system transformer to ensure consistent modules iteration. ([@guybedford](https://github.com/guybedford))
+
+Fixes inconsistent modules iteration for numeric imports
+
+```js
+import "2"; // should be imported first
+import "1"; // second
+```
+
+* `babel-plugin-transform-es2015-destructuring`, `babel-plugin-transform-react-constant-elements`
+  * [#4813](https://github.com/babel/babel/pull/4813) Fix binding kind of destructured variables.. ([@STRML](https://github.com/STRML))
+
+Fixes an issue with destructuring parameters being hoisted incorrectly.
+
+Input
+```
+function render({ text }) {
+  return () => (<Component text={text} />);
+}
+```
+
+Output
+```
+function render(_ref) {
+  let text = _ref.text;
+  var _ref2 = <Component text={text} />;
+  return () => _ref2;
+}
+```
+
+#### :memo: Documentation
+* Other
+  * [#4802](https://github.com/babel/babel/pull/4802) Add toc [skip ci]. ([@hzoo](https://github.com/hzoo))
+
+#### :house: Internal
+* `babel-plugin-transform-async-to-generator`
+  * [#4837](https://github.com/babel/babel/pull/4837) Fix crlf to lf. ([@lion-man44](https://github.com/lion-man44))
+* Other
+  * [#4807](https://github.com/babel/babel/pull/4807) Chore: FLOW command in makefile and logic in .travis.yml(issue#4710).. ([@sstern6](https://github.com/sstern6))
+
+#### Committers: 10
+- Boopathi Rajaa ([boopathi](https://github.com/boopathi))
+- Guy Bedford ([guybedford](https://github.com/guybedford))
+- Henry Zhu ([hzoo](https://github.com/hzoo))
+- Juriy Zaytsev ([kangax](https://github.com/kangax))
+- Moti Zilberman ([motiz88](https://github.com/motiz88))
+- Sam Pepose ([sampepose](https://github.com/sampepose))
+- Samuel Reed ([STRML](https://github.com/STRML))
+- Scott Stern ([sstern6](https://github.com/sstern6))
+- Shine Wang ([shinew](https://github.com/shinew))
+- lion ([lion-man44](https://github.com/lion-man44))
+ 
 ## v6.18.2 (2016-11-01)
 
 Weird publishing issue with v6.18.1, same release.