mozilla
Your Search Results

    Date.now()

    Summary

    The Date.now() method returns the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.

    Syntax

    var timeInMs = Date.now();

    Parameters

    None.

    Description

    The now() method returns the milliseconds elapsed since 1 January 1970 00:00:00 UTC up until now as a Number.

    Because now() is a static method of Date, you always use it as Date.now().

    Polyfill

    This method was standardized in ECMA-262 5th edition. Engines which have not been updated to support this method can work around the absence of this method using the following shim:

    if (!Date.now) {
      Date.now = function now() {
        return new Date().getTime();
      };
    }
    

    Specifications

    Specification Status Comment
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Date.now' in that specification.
    Standard Initial definition. Implemented in JavaScript 1.5.
    ECMAScript 6 (ECMA-262)
    The definition of 'Date.now' in that specification.
    Release Candidate  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support 5 3.0 (1.9) 9 10.50 4
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

    Based on Kangax's compat table.

    See also

    Document Tags and Contributors

    Last updated by: SphinxKnight,
    Hide Sidebar