object-is
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1.1.6 • Public • Published

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ES2015-compliant shim for Object.is - differentiates between -0 and +0, and can compare to NaN.

Essentially, Object.is returns the same value as === - but true for NaN, and false for -0 and +0.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.

Example

Object.is = require('object-is');
var assert = require('assert');

assert.ok(Object.is());
assert.ok(Object.is(undefined));
assert.ok(Object.is(undefined, undefined));
assert.ok(Object.is(null, null));
assert.ok(Object.is(true, true));
assert.ok(Object.is(false, false));
assert.ok(Object.is('foo', 'foo'));

var arr = [1, 2];
assert.ok(Object.is(arr, arr));
assert.equal(Object.is(arr, [1, 2]), false);

assert.ok(Object.is(0, 0));
assert.ok(Object.is(-0, -0));
assert.equal(Object.is(0, -0), false);

assert.ok(Object.is(NaN, NaN));
assert.ok(Object.is(Infinity, Infinity));
assert.ok(Object.is(-Infinity, -Infinity));

Tests

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

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Install

npm i object-is

Weekly Downloads

18,354,500

Version

1.1.6

License

MIT

Unpacked Size

27 kB

Total Files

15

Last publish

Collaborators

  • ljharb