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An Object.assign shim. Invoke its "shim" method to shim Object.assign if it is unavailable.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec. In an ES6 environment, it will also work properly with Symbols.

Takes a minimum of 2 arguments: target and source.
Takes a variable sized list of source arguments - at least 1, as many as you want.
Throws a TypeError if the target argument is null or undefined.

Most common usage:
``js
var assign = require('object.assign').getPolyfill(); // returns native method if compliant
/ or /
var assign = require('object.assign/polyfill')(); // returns native method if compliant
`

Example

`js
var assert = require('assert');

// Multiple sources!
var target = { a: true };
var source1 = { b: true };
var source2 = { c: true };
var sourceN = { n: true };

var expected = {
a: true,
b: true,
c: true,
n: true
};

assign(target, source1, source2, sourceN);
assert.deepEqual(target, expected); // AWESOME!
`

`js
var target = {
a: true,
b: true,
c: true
};
var source1 = {
c: false,
d: false
};
var sourceN = {
e: false
};

var assigned = assign(target, source1, sourceN);
assert.equal(target, assigned); // returns the target object
assert.deepEqual(assigned, {
a: true,
b: true,
c: false,
d: false,
e: false
});
`

`js
/ when Object.assign is not present /
delete Object.assign;
var shimmedAssign = require('object.assign').shim();
/ or /
var shimmedAssign = require('object.assign/shim')();

assert.equal(shimmedAssign, assign);

var target = {
a: true,
b: true,
c: true
};
var source = {
c: false,
d: false,
e: false
};

var assigned = assign(target, source);
assert.deepEqual(Object.assign(target, source), assign(target, source));
`

`js
/ when Object.assign is present /
var shimmedAssign = require('object.assign').shim();
assert.equal(shimmedAssign, Object.assign);

var target = {
a: true,
b: true,
c: true
};
var source = {
c: false,
d: false,
e: false
};

assert.deepEqual(Object.assign(target, source), assign(target, source));
`

Tests


Simply clone the repo, npm install, and run npm test`

[npm-url]: https://npmjs.org/package/object.assign
[npm-version-svg]: http://versionbadg.es/ljharb/object.assign.svg
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[travis-url]: https://travis-ci.org/ljharb/object.assign
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[deps-url]: https://david-dm.org/ljharb/object.assign
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[dev-deps-url]: https://david-dm.org/ljharb/object.assign#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/object.assign.png?downloads=true&stars=true
[license-image]: http://img.shields.io/npm/l/object.assign.svg
[license-url]: LICENSE
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