.. | ||
test | ||
.eslintignore | ||
.eslintrc | ||
.nycrc | ||
auto.js | ||
CHANGELOG.md | ||
implementation.js | ||
index.js | ||
LICENSE | ||
package.json | ||
polyfill.js | ||
README.md | ||
shim.js |
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.notOk(Object.is(arr, [1, 2]));
assert.ok(Object.is(0, 0));
assert.ok(Object.is(-0, -0));
assert.notOk(Object.is(0, -0));
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