object-assign 
ES2015
Object.assign()ponyfill
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 object-assign
Usage
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.