84 lines
1.0 KiB
Markdown
84 lines
1.0 KiB
Markdown
# @babel/plugin-transform-spread
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> Compile ES2015 spread to ES5
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## Example
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**In**
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```js
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var a = ['a', 'b', 'c'];
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var b = [...a, 'foo'];
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var c = foo(...a);
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```
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**Out**
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```js
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var a = ['a', 'b', 'c'];
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var b = a.concat(['foo']);
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var c = foo.apply(void 0, a);
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```
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## Installation
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```sh
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npm install --save-dev @babel/plugin-transform-spread
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```
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## Usage
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### Via `.babelrc` (Recommended)
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**.babelrc**
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Without options:
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```json
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{
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"plugins": ["@babel/plugin-transform-spread"]
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}
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```
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With options:
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```json
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{
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"plugins": [
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["@babel/plugin-transform-spread", {
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"loose": true
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}]
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]
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}
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```
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### Via CLI
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```sh
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babel --plugins @babel/plugin-transform-spread script.js
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```
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### Via Node API
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```javascript
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require("@babel/core").transform("code", {
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plugins: ["@babel/plugin-transform-spread"]
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});
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```
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## Options
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### `loose`
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`boolean`, defaults to `false`.
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In loose mode, **all** iterables are assumed to be arrays.
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## References
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* [MDN: Spread syntax](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax)
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