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| .. | ||
| .github | ||
| test | ||
| .eslintignore | ||
| .eslintrc | ||
| .nycrc | ||
| auto.js | ||
| CHANGELOG.md | ||
| implementation.js | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| polyfill.js | ||
| README.md | ||
| shim.js | ||
is-nan 
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Example
Number.isNaN = require('is-nan');
var assert = require('assert');
assert.notOk(Number.isNaN(undefined));
assert.notOk(Number.isNaN(null));
assert.notOk(Number.isNaN(false));
assert.notOk(Number.isNaN(true));
assert.notOk(Number.isNaN(0));
assert.notOk(Number.isNaN(42));
assert.notOk(Number.isNaN(Infinity));
assert.notOk(Number.isNaN(-Infinity));
assert.notOk(Number.isNaN('foo'));
assert.notOk(Number.isNaN(function () {}));
assert.notOk(Number.isNaN([]));
assert.notOk(Number.isNaN({}));
assert.ok(Number.isNaN(NaN));
Tests
Simply clone the repo, npm install, and run npm test