object-is

    1.0.1 • Public • Published

    object-is Version Badge

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    browser support

    ES6-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.

    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

    Install

    npm i object-is@1.0.1

    Version

    1.0.1

    License

    MIT

    Last publish

    Collaborators

    • ljharb
    • substack