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changelog (#65)

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# Changelog
## v1.0.0 (2016-12-09)
### :rocket: New Feature
* Add `useBuiltIns` option ([#56](https://github.com/babel/babel-preset-env/pull/55)) ([@hzoo](https://github.com/hzoo)), ([@yavorsky](https://github.com/yavorsky)), ([@existentialism](https://github.com/existentialism))
A way to apply `babel-preset-env` for polyfills (via `"babel-polyfill"``).
> This option will apply a new Babel plugin that replaces `require("babel-polyfill")` with the individual requires for `babel-polyfill` based on the target environments.
Install
```
npm install babel-polyfill --save
```
In
```js
import "babel-polyfill"; // create an entry js file that contains this
// or
import "core-js";
```
Out (different based on environment)
```js
// chrome 55
import "core-js/modules/es7.string.pad-start"; // haha left_pad
import "core-js/modules/es7.string.pad-end";
import "core-js/modules/web.timers";
import "core-js/modules/web.immediate";
import "core-js/modules/web.dom.iterable";
```
`.babelrc` Usage
```js
{
"presets": [
["env", {
"targets": {
"electron": 1.4
},
"modules": false, // webpack 2
"useBuiltIns": true // new option
}]
]
}
```
> Also looking to make an easier integration point via Webpack with this method. Please reach out if you have ideas!
---
* Support [Electron](http://electron.atom.io/) ([#55](https://github.com/babel/babel-preset-env/pull/55)) ([@paulcbetts](https://github.com/paulcbetts))
Electron is also an environment, so [Paul went ahead](https://twitter.com/paulcbetts/status/804507070103851008) and added support for this!
`.babelrc` Usage
```js
{
"presets": [ ["env", {"targets": { "electron": 1.4 }}]]
}
```
> Currently we are manually updating the data in [/data/electronToChromium.js](https://github.com/babel/babel-preset-env/blob/master/data/electronToChromium.js), but [@kevinsawicki](https://github.com/kevinsawicki) says we could generate the data from [atom-shell/dist/index.json](https://gh-contractor-zcbenz.s3.amazonaws.com/atom-shell/dist/index.json) as well! (Someone should make a PR :smile:)
## v0.0.9 (2016-11-24)
### :rocket: New Feature
* Support Opera ([#48](https://github.com/babel/babel-preset-env/pull/48) (Henry Zhu)
* Support Opera ([#48](https://github.com/babel/babel-preset-env/pull/48)) (Henry Zhu)
Was as simple as modifying the chrome version and subtracting 13! (so chrome 54 = opera 41)