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# value-equal [![Travis][build-badge]][build] [![npm package][npm-badge]][npm]

[build-badge]: https://img.shields.io/travis/mjackson/value-equal/master.svg?style=flat-square
[build]: https://travis-ci.org/mjackson/value-equal
[npm-badge]: https://img.shields.io/npm/v/value-equal.svg?style=flat-square
[npm]: https://www.npmjs.org/package/value-equal

[`value-equal`](https://www.npmjs.com/package/value-equal) determines if two JavaScript values are equal using [`Object.prototype.valueOf`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf).

In many instances when I'm checking for object equality, what I really want to know is if their **values** are equal. This is good for:

- Stuff you keep in `localStorage`
- `window.history.state` values
- Query strings

## Installation

Using [npm](https://www.npmjs.com/):

    $ npm install --save value-equal

Then with a module bundler like [webpack](https://webpack.github.io/), use as you would anything else:

```js
// using ES6 modules
import valueEqual from 'value-equal';

// using CommonJS modules
var valueEqual = require('value-equal');
```

The UMD build is also available on [unpkg](https://unpkg.com):

```html
<script src="https://unpkg.com/value-equal"></script>
```

You can find the library on `window.valueEqual`.

## Usage

```js
valueEqual(1, 1); // true
valueEqual('asdf', 'asdf'); // true
valueEqual('asdf', new String('asdf')); // true
valueEqual(true, true); // true
valueEqual(true, false); // false
valueEqual({ a: 'a' }, { a: 'a' }); // true
valueEqual({ a: 'a' }, { a: 'b' }); // false
valueEqual([1, 2, 3], [1, 2, 3]); // true
valueEqual([1, 2, 3], [2, 3, 4]); // false
```

That's it. Enjoy!