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