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Get an array of all distinct NaN values supported by the engine. There can be only one!
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README.md

get-nans Version Badge

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browser support

JavaScript should only have one distinguishable NaN value. However, some engines violate this, and have at least two.

This module returns an array of all the NaNs it knows how to detect on the current engine.

Current engines with only one observable NaN value:

  • Edge v14

Current known failures:

  • node (v0.6 - v0.12, v4.0 - v6.3.1)
  • io.js (all versions)
  • Chrome (v43 - v52, at least)
  • Firefox (v38 - v47, at least)
  • Internet Explorer (v10 - v11)

Example

var getNaNs = require('get-nans');
var assert = require('assert');

var nans = getNaNs();
assert.deepEqual(nans, [NaN]);

Relevant links

Tests

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

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