Merge pull request #3302 from babel/6.5.0-changelog
add 6.5.0 changelog
This commit is contained in:
Henry Zhu
commit
31404b9bdc
236
CHANGELOG.md
236
CHANGELOG.md
@ -13,6 +13,242 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
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See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
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See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
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## 6.5.0 (2016-02-07)
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Happy Superbowl Sunday! There's many contributors (17 + core) this release!
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### A traversal per preset
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[@DmitrySoshnikov](https://github.com/DmitrySoshnikov) added a new option you can put in your `.babelrc`!
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```js
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{
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passPerPreset: true,
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presets: [
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{
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plugins: ['plugin-1']
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},
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'preset-2',
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{
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plugins: ['plugin-2']
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}
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]
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}
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// this will create 3 traversals
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```
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`passPerPreset: true` will modify how babel traverses through plugins. Instead of a single traversal in which all plugins/presets are merged together, each preset will get their own traversal.
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This allows users to have a specific order to how presets/plugins are applied and can help avoid potential collisions between plugins (and probably some known issues).
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Depending on usage, we will switch the way this is used to instead define a explicit preset-level config flag (rather than the current global one).
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---
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### More Speeeeeeed
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[@gzzhanghao](https://github.com/gzzhanghao) made some awesome changes to improve our code generator's performance (`babel-generator`). The original issue is [here](https://phabricator.babeljs.io/T6884).
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Based on his test (on parsing `jquery.js`), performance improved ~3x.
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```
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===== origin/master (ms) =====
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babylon 265
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babel generator 2238 <-- old
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acorn 107
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escodegen 355
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esprima 95
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escodegen 322
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===== Optimized (ms) =====
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babylon 296
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babel generator 662 <-- new
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acorn 113
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escodegen 355
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esprima 106
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escodegen 317
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```
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A big change had to do with keeping `this.last` as an instance variable in the buffer instead of `this.buf[this.buf.length -1]`.
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> You can read more about his changes [here](https://github.com/babel/babel/pull/3283#discussion-diff-50198857). Hoping to see more PR's like this!
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We will try to setup some perf tests soon to track these stats for the future (or you can help!).
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#### New Feature
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+ `babel-core`
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+ [#3168](https://github.com/babel/babel/pull/3168) Use the `babelrc` option in `babel-register`. ([@CrocoDillon](https://github.com/CrocoDillon))
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+ `babel-core`
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+ [#3281](https://github.com/babel/babel/pull/3281) `passPerPreset` option in `.babelrc`: if `true`, babel will create a new traversal for each preset. ([@DmitrySoshnikov](https://github.com/DmitrySoshnikov))
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+ `babel-helper-transform-fixture-test-runner`, `babel-plugin-transform-react-jsx-source`
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+ [#3285](https://github.com/babel/babel/pull/3285) Hoist the current file name (an absolute path) for `transform-react-jsx-source` . ([@frantic](https://github.com/frantic))
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This plugin (useful for tooling) will turn
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```js
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// this/file.js
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<sometag />
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```
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into
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```js
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var _jsxFileName = "this/file.js"; // the output will be an absolute path
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var x = <sometag __source={{
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fileName: _jsxFileName,
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lineNumber: 1
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}} />;
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```
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+ `babel-template`
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+ [#3304](https://github.com/babel/babel/pull/3304) Allow passing in `babylon` options into `babel-template`. (issue [T7046](phabricator.babeljs.io/T7046)) ([@jamestalmage](https://github.com/jamestalmage))
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+ `babel-core`
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+ [#3313](https://github.com/babel/babel/pull/3313) Add `babel.analyze` - an api sugar for getting back metadata from babel. ([@kittens](https://github.com/kittens))
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```js
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// analyse not analyze :D
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// usage
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babel.analyse("foobar;", {}, {
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Program: function (path) {
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path.mark("category", "foobar");
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}
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}).marked[0].message // outputs "foobar"
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```
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+ `babylon`
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+ [#3319](https://github.com/babel/babel/pull/3319) Add support for leading pipes in Flow type alias RHS syntax ([@jeffmo](https://github.com/jeffmo))
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```js
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// allows for either `|` or `&`
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type union =
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;
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```
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> This was added in [flow](https://github.com/facebook/flow/) in [`7fb56ee9d8`](https://github.com/facebook/flow/commit/7fb56ee9d87517973b4ab32f180ff968c99dded5).
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#### Bug Fix
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> Code samples below each bullet
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+ `babel-helper-define-map`, `babel-helper-function-name`, `babel-plugin-transform-es2015-classes`
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+ [#3298](https://github.com/babel/babel/pull/3298) Set `NOT_LOCAL_BINDING` symbol on all inferred function names. (issue [T7010](https://phabricator.babeljs.io/T7010), regression of [#3274](https://github.com/babel/babel/pull/3274)) ([@amasad](https://github.com/amasad))
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```js
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// When the same name as a method in a class is used
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class Foo {
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constructor(val) {
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this._val = val;
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}
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foo2() {
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return foo2(this._val); // was erroring since foo2 is used
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}
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}
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```
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+ `babel-helper-remap-async-to-generator`, `babel-plugin-transform-async-to-generator`
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+ [#3297](https://github.com/babel/babel/pull/3297) Fixes the wrong `this` for nested arrow functions. (Issue [T2765#72428](https://phabricator.babeljs.io/T2765#72428)) ([@horpto](https://github.com/horpto))
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```js
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// nested arrow functions
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class A {
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async method() {
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() => {
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() => this; // `this` in nested arrow function was incorrect
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}
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}
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}
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```
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+ `babel-template`
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+ [#3314](https://github.com/babel/babel/pull/3314) Only strip node info if no `node.loc`. Fixes an issue with sourcemap generation for SystemJS with `babel-template`. (Issue [T6903](https://phabricator.babeljs.io/T6903)) ([@guybedford](https://github.com/guybedford))
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+ `babel-traverse`
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+ [#3300](https://github.com/babel/babel/pull/3300) Fix an issue with transpiling generator functions with default arguments. (Issue [T2776](https://phabricator.babeljs.io/T2776)) ([@gzzhanghao](https://github.com/gzzhanghao))
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```js
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// a generator with a default argument
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export class Test {
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*memberGenerator(arg = 0) {
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console.log(arg);
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}
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start() {
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this.memberGenerator(1).next();
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}
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}
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```
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+ `babel-generator`
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+ [#3311](https://github.com/babel/babel/pull/3311) Consider arrow functions when parenthesizing object expressions. (Issue [T7047](https://phabricator.babeljs.io/T7047)) ([@amasad](https://github.com/amasad))
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```js
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var fn = () => ({}).key;
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```
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+ `babel-helper-remap-async-to-generator`, `babel-plugin-transform-es2015-modules-commonjs`
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+ [#3312](https://github.com/babel/babel/pull/3312) Fix async functions not being hoisted. (Issue [T6882](https://phabricator.babeljs.io/T6882)) ([@erikdesjardins](https://github.com/erikdesjardins))
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```js
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foo();
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async function foo() {} // this should be hoisted above foo();
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```
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+ `babel-generator`
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+ [#3324](https://github.com/babel/babel/pull/3324) Parenthesize the `in` in a for-loop init, even in the case when it is nested. ([@zjmiller](https://github.com/zjmiller))
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```js
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// nested for loop
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for (function(){for(;;);} && (a in b);;);
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```
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+ `babylon`
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+ [#3305](https://github.com/babel/babel/pull/3305) Fix: Arrow functions with trailing comma + return type parsing error. ([Issue T7052](https://phabricator.babeljs.io/T7052)) ([@jviereck](https://github.com/jviereck))
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```js
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const X = (
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props: SomeType,
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): ReturnType => (
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3
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);
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```
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#### Documentation
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+ [#3321](https://github.com/babel/babel/pull/3321) Docs: add information on writing tests in babylon. ([@hzoo](https://github.com/hzoo))
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+ [#3308](https://github.com/babel/babel/pull/3308) Update compiler-environment-support.md. ([@sappharx](https://github.com/sappharx))
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+ [#3293](https://github.com/babel/babel/pull/3293) ast/spec: update `Decorator` property. ([@hzoo](https://github.com/hzoo))
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+ [#3295](https://github.com/babel/babel/pull/3295) ast/spec: add `BindExpression`. ([@hzoo](https://github.com/hzoo))
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+ [#3287](https://github.com/babel/babel/pull/3287) Correct use of possessive case. ([@nettofarah](https://github.com/nettofarah))
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+ [#3301](https://github.com/babel/babel/pull/3301) ast/spec: add `Literal` and `Pattern` interfaces, update `Identifier` interface. ([@jmm](https://github.com/jmm))
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#### Internal
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+ [#3317](https://github.com/babel/babel/pull/3317) `make
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publish`: add `make build` in case it wasn't run. ([@hzoo](https://github.com/hzoo))
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+ `babel-generator`
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+ [#3316](https://github.com/babel/babel/pull/3316) Simplify `babel-generator/node/index.js`. ([@forivall](https://github.com/forivall))
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+ `babel-core`, `babel-generator`, `babel-traverse`, `babel-types`,`babylon`
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+ [#3186](https://github.com/babel/babel/pull/3186) Add more flow types, update flow, eslint, babel-eslint, only run flow on node 5. ([@hzoo](https://github.com/hzoo))
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+ `babel-core`
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+ [#3318](https://github.com/babel/babel/pull/3318) Add a test for #3303. ([@hzoo](https://github.com/hzoo))
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+ `babel-plugin-transform-async-to-generator`
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+ [#3290](https://github.com/babel/babel/pull/3290) Add a test for [T3026](phabricator.babeljs.io/T3026). ([@AgentME](https://github.com/AgentME))
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+ `babel-generator`
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+ [#3299](https://github.com/babel/babel/pull/3299) Add a test to ensure that we do not break mutli-byte handling. ([@robcolburn](https://github.com/robcolburn))
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+ `babel-cli`
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+ [#3307](https://github.com/babel/babel/pull/3307) Make the `chokidar` dependency optional. ([@josh](https://github.com/josh))
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+ `babel-types`
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+ [#3294](https://github.com/babel/babel/pull/3294) `WithStatements` can have statements as bodies. ([@amasad](https://github.com/amasad))
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+ `babel-types`
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+ [#3292](https://github.com/babel/babel/pull/3292) `UnaryExpressions` are never not prefix. ([@amasad](https://github.com/amasad))
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#### Polish
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+ `babel-generator`
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+ [#3283](https://github.com/babel/babel/pull/3283) Improve generator performance. (Issue [T6884](phabricator.babeljs.io/T6884)) ([@gzzhanghao](https://github.com/gzzhanghao))
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## 6.4.6 (2016-01-20)
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## 6.4.6 (2016-01-20)
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* **Bug Fix**
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* **Bug Fix**
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