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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)
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