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# object-assign [](https://travis-ci.org/sindresorhus/object-assign)
> ES2015 [`Object.assign()`](http://www.2ality.com/2014/01/object-assign.html) [ponyfill](https://ponyfill.com)
## Use the built-in
Node.js 4 and up, as well as every evergreen browser (Chrome, Edge, Firefox, Opera, Safari),
support `Object.assign()` :tada:. If you target only those environments, then by all
means, use `Object.assign()` instead of this package.
## Install
```
$ npm install --save object-assign
```
## Usage
```js
const objectAssign = require('object-assign');
objectAssign({foo: 0}, {bar: 1});
//=> {foo: 0, bar: 1}
// multiple sources
objectAssign({foo: 0}, {bar: 1}, {baz: 2});
//=> {foo: 0, bar: 1, baz: 2}
// overwrites equal keys
objectAssign({foo: 0}, {foo: 1}, {foo: 2});
//=> {foo: 2}
// ignores null and undefined sources
objectAssign({foo: 0}, null, {bar: 1}, undefined);
//=> {foo: 0, bar: 1}
```
## API
### objectAssign(target, [source, ...])
Assigns enumerable own properties of `source` objects to the `target` object and returns the `target` object. Additional `source` objects will overwrite previous ones.
## Resources
- [ES2015 spec - Object.assign](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.assign)
## Related
- [deep-assign](https://github.com/sindresorhus/deep-assign) - Recursive `Object.assign()`
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)