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