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