is-negative-zero

Is this value negative zero? === will lie to you.

Example

var isNegativeZero = require('is-negative-zero');
var assert = require('assert');

assert.notOk(isNegativeZero(undefined));
assert.notOk(isNegativeZero(null));
assert.notOk(isNegativeZero(false));
assert.notOk(isNegativeZero(true));
assert.notOk(isNegativeZero(0));
assert.notOk(isNegativeZero(42));
assert.notOk(isNegativeZero(Infinity));
assert.notOk(isNegativeZero(-Infinity));
assert.notOk(isNegativeZero(NaN));
assert.notOk(isNegativeZero('foo'));
assert.notOk(isNegativeZero(function () {}));
assert.notOk(isNegativeZero([]));
assert.notOk(isNegativeZero({}));

assert.ok(isNegativeZero(-0));

Tests

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

Current Tags

• 2.0.3                                ...           latest (9 months ago)

8 Versions

• 2.0.3                                ...           9 months ago
• 2.0.2                                ...           3 years ago
• 2.0.1                                ...           4 years ago
• 2.0.0                                ...           9 years ago
• 1.0.0                                ...           10 years ago
• 0.1.1                                ...           11 years ago
• 0.1.0                                ...           11 years ago
• 0.0.0 [deprecated]           ...           11 years ago