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Add built-ins, better links, compat-table url, etc (#195) [skip ci]

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Artem Yavorsky 2017-03-08 17:54:16 +02:00 committed by Henry Zhu
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commit 84d4b9de5d
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36
experimental/babel-preset-env/CONTRIBUTING.md
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@ -2,13 +2,13 @@
### Adding a new plugin to support (when approved in the next ECMAScript version)
#### Update [`pluginFeatures.js`](https://github.com/babel/babel-preset-env/blob/master/data/plugin-features.js)
#### Update [`plugin-features.js`](https://github.com/babel/babel-preset-env/blob/master/data/plugin-features.js)
Example:
*Example:*
In you were going to add `**` which is in ES2016:
If you were going to add `**` which is in ES2016:
Find the relevant entries on [compat-table](https://kangax.github.io/compat-table/):
Find the relevant entries on [compat-table](https://kangax.github.io/compat-table/es2016plus/#test-exponentiation_(**)_operator):
`exponentiation (**) operator`
@ -16,7 +16,7 @@ Find the corresponding babel plugin:
`transform-exponentiation-operator`
Add add them in this structure:
And add them in this structure:
```js
// es2016
@ -27,11 +27,35 @@ Add add them in this structure:
},
```
#### Update [`built-in-features.js`](https://github.com/babel/babel-preset-env/blob/master/data/built-in-features.js)
*Example:*
In case you want to add `Object.values` which is in ES2017:
Find the relevant feature and subfeature on [compat-table](https://kangax.github.io/compat-table/es2016plus/#test-Object_static_methods_Object.values)
and split it with `/`:
`Object static methods / Object.values`
Find the corresponding module on [core-js](https://github.com/zloirock/core-js/tree/master/modules):
`es7.object.values.js`
Find required ES version in [`built-in-features.js`](https://github.com/babel/babel-preset-env/blob/master/data/built-in-features.js) and add the new feature:
```js
const es2017 = {
//...
"es7.object.values": "Object static methods / Object.values"
}
```
#### Update [`plugins.json`](https://github.com/babel/babel-preset-env/blob/master/data/plugins.json)
Until `compat-table` is a standalone npm module for data we are using the git url
`"compat-table": "github:kangax/compat-table#gh-pages",`
`"compat-table": "kangax/compat-table#[latest-commit-hash]"`,
So we update and then run `npm run build-data`. If there are no changes, then `plugins.json` will be the same.