cerxes/babel
3
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge pull request #3302 from babel/6.5.0-changelog

Browse Source 
add 6.5.0 changelog
This commit is contained in:
Henry Zhu 2016-02-05 17:21:20 -05:00
commit 31404b9bdc
1 changed files with 236 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

236
CHANGELOG.md
View File

@ -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.
## 6.5.0 (2016-02-07)
Happy Superbowl Sunday! There's many contributors (17 + core) this release!
### A traversal per preset
[@DmitrySoshnikov](https://github.com/DmitrySoshnikov) added a new option you can put in your `.babelrc`!
```js
{
passPerPreset: true,
presets: [
{
plugins: ['plugin-1']
},
'preset-2',
{
plugins: ['plugin-2']
}
]
}
// this will create 3 traversals
```
`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.
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).
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).
---
### More Speeeeeeed
![](http://comicsalliance.com/files/2012/03/tumblrm0beomkppg1r5ur0ho1500.gif)
[@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).
Based on his test (on parsing `jquery.js`), performance improved ~3x.
```
===== origin/master (ms) =====
babylon 265
babel generator 2238 <-- old
acorn 107
escodegen 355
esprima 95
escodegen 322
===== Optimized (ms) =====
babylon 296
babel generator 662 <-- new
acorn 113
escodegen 355
esprima 106
escodegen 317
```
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]`.
> 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!
We will try to setup some perf tests soon to track these stats for the future (or you can help!).
#### New Feature
+ `babel-core`
+ [#3168](https://github.com/babel/babel/pull/3168) Use the `babelrc` option in `babel-register`. ([@CrocoDillon](https://github.com/CrocoDillon))
+ `babel-core`
+ [#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))
+ `babel-helper-transform-fixture-test-runner`, `babel-plugin-transform-react-jsx-source`
+ [#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))
This plugin (useful for tooling) will turn
```js
// this/file.js
<sometag />
```
into
```js
var _jsxFileName = "this/file.js"; // the output will be an absolute path
var x = <sometag __source={{
fileName: _jsxFileName,
lineNumber: 1
}} />;
```
+ `babel-template`
+ [#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))
+ `babel-core`
+ [#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))
```js
// analyse not analyze :D
// usage
babel.analyse("foobar;", {}, {
Program: function (path) {
path.mark("category", "foobar");
}
}).marked[0].message // outputs "foobar"
```
+ `babylon`
+ [#3319](https://github.com/babel/babel/pull/3319) Add support for leading pipes in Flow type alias RHS syntax ([@jeffmo](https://github.com/jeffmo))
```js
// allows for either `|` or `&`
type union =
| {type: "A"}
| {type: "B"}
;
```
> This was added in [flow](https://github.com/facebook/flow/) in [`7fb56ee9d8`](https://github.com/facebook/flow/commit/7fb56ee9d87517973b4ab32f180ff968c99dded5).
#### Bug Fix
> Code samples below each bullet
+ `babel-helper-define-map`, `babel-helper-function-name`, `babel-plugin-transform-es2015-classes`
+ [#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))
```js
// When the same name as a method in a class is used
class Foo {
constructor(val) {
this._val = val;
}
foo2() {
return foo2(this._val); // was erroring since foo2 is used
}
}
```
+ `babel-helper-remap-async-to-generator`, `babel-plugin-transform-async-to-generator`
+ [#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))
```js
// nested arrow functions
class A {
async method() {
() => {
() => this; // `this` in nested arrow function was incorrect
}
}
}
```
+ `babel-template`
+ [#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))
+ `babel-traverse`
+ [#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))
```js
// a generator with a default argument
export class Test {
*memberGenerator(arg = 0) {
console.log(arg);
}
start() {
this.memberGenerator(1).next();
}
}
```
+ `babel-generator`
+ [#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))
```js
var fn = () => ({}).key;
```
+ `babel-helper-remap-async-to-generator`, `babel-plugin-transform-es2015-modules-commonjs`
+ [#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))
```js
foo();
async function foo() {} // this should be hoisted above foo();
```
+ `babel-generator`
+ [#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))
```js
// nested for loop
for (function(){for(;;);} && (a in b);;);
```
+ `babylon`
+ [#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))
```js
const X = (
props: SomeType,
): ReturnType => (
3
);
```
#### Documentation
+ [#3321](https://github.com/babel/babel/pull/3321) Docs: add information on writing tests in babylon. ([@hzoo](https://github.com/hzoo))
+ [#3308](https://github.com/babel/babel/pull/3308) Update compiler-environment-support.md. ([@sappharx](https://github.com/sappharx))
+ [#3293](https://github.com/babel/babel/pull/3293) ast/spec: update `Decorator` property. ([@hzoo](https://github.com/hzoo))
+ [#3295](https://github.com/babel/babel/pull/3295) ast/spec: add `BindExpression`. ([@hzoo](https://github.com/hzoo))
+ [#3287](https://github.com/babel/babel/pull/3287) Correct use of possessive case. ([@nettofarah](https://github.com/nettofarah))
+ [#3301](https://github.com/babel/babel/pull/3301) ast/spec: add `Literal` and `Pattern` interfaces, update `Identifier` interface. ([@jmm](https://github.com/jmm))
#### Internal
+ [#3317](https://github.com/babel/babel/pull/3317) `make
publish`: add `make build` in case it wasn't run. ([@hzoo](https://github.com/hzoo))
+ `babel-generator`
+ [#3316](https://github.com/babel/babel/pull/3316) Simplify `babel-generator/node/index.js`. ([@forivall](https://github.com/forivall))
+ `babel-core`, `babel-generator`, `babel-traverse`, `babel-types`,`babylon`
+ [#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))
+ `babel-core`
+ [#3318](https://github.com/babel/babel/pull/3318) Add a test for #3303. ([@hzoo](https://github.com/hzoo))
+ `babel-plugin-transform-async-to-generator`
+ [#3290](https://github.com/babel/babel/pull/3290) Add a test for [T3026](phabricator.babeljs.io/T3026). ([@AgentME](https://github.com/AgentME))
+ `babel-generator`
+ [#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))
+ `babel-cli`
+ [#3307](https://github.com/babel/babel/pull/3307) Make the `chokidar` dependency optional. ([@josh](https://github.com/josh))
+ `babel-types`
+ [#3294](https://github.com/babel/babel/pull/3294) `WithStatements` can have statements as bodies. ([@amasad](https://github.com/amasad))
+ `babel-types`
+ [#3292](https://github.com/babel/babel/pull/3292) `UnaryExpressions` are never not prefix. ([@amasad](https://github.com/amasad))
#### Polish
+ `babel-generator`
+ [#3283](https://github.com/babel/babel/pull/3283) Improve generator performance. (Issue [T6884](phabricator.babeljs.io/T6884)) ([@gzzhanghao](https://github.com/gzzhanghao))
## 6.4.6 (2016-01-20)
* **Bug Fix**