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Marek Piasecki
06fbe82dce
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2 years ago | |
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.. | ||
test | 2 years ago | |
.eslintignore | 2 years ago | |
.eslintrc | 2 years ago | |
.nycrc | 2 years ago | |
CHANGELOG.md | 2 years ago | |
LICENSE | 2 years ago | |
README.md | 2 years ago | |
auto.js | 2 years ago | |
implementation.js | 2 years ago | |
index.js | 2 years ago | |
package.json | 2 years ago | |
polyfill.js | 2 years ago | |
shim.js | 2 years ago |
README.md
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