Number.EPSILON

This is an experimental technology, part of the Harmony (ECMAScript 6) proposal.
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.

Summary

The Number.EPSILON property represents the difference between one and the smallest value greater than one that can be represented as a Number.

You do not have to create a Number object to access this static property (use Number.EPSILON).

Property attributes of `Number.EPSILON`
Writable	no
Enumerable	no
Configurable	no

Description

The EPSILON property has a value of approximately 2.2204460492503130808472633361816E-16.

Examples

Testing equality

x = 0.2;
y = 0.3;
equal = (Math.abs(x - y) < Number.EPSILON)

Specifications

Specification	Status	Comment
ECMAScript 6 (ECMA-262) Die Definition von 'Number.EPSILON' in dieser Spezifikation.	Entwurf	Initial definition.

Browser compatibility

Help improve compatibility tables by filling out this 11 question survey.

Desktop
Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	(Ja)	25.0 (25.0)	Nicht unterstützt	(Ja)	Nicht unterstützt

Feature	Android	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	Nicht unterstützt	Nicht unterstützt	25.0 (25.0)	Nicht unterstützt	Nicht unterstützt	Nicht unterstützt