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    Date.prototype.getTime()

    Summary

    The getTime() method returns the numeric value corresponding to the time for the specified date according to universal time.

    You can use this method to help assign a date and time to another Date object. This method is functionally equivalent to the valueOf() method.

    Syntax

    dateObj.getTime()

    Parameters

    None.

    Returns

    The value returned by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC.

    Examples

    Example: Using getTime() for copying dates

    Constructing a date object with the identical time value.

    var birthday = new Date(1994, 12, 10);
    var copy = new Date();
    copy.setTime(birthday.getTime());
    

    Example: Measuring execution time

    Subtracting two subsequent getTime() calls on newly generated Date objects, give the time span between these two calls. This can be used to calculate the executing time of some operations.

    var end, start;
    
    start = new Date();
    for (var i = 0; i < 1000; i++) {
      Math.sqrt(i);
    }
    end = new Date();
    
    console.log('Operation took ' + (end.getTime() - start.getTime()) + ' msec');
    

    Specifications

    Specification Status Comment
    ECMAScript 1st Edition. Standard Initial definition. Implemented in JavaScript 1.0.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Date.prototype.getTime' in that specification.
    Standard  
    ECMAScript 6 (ECMA-262)
    The definition of 'Date.prototype.getTime' in that specification.
    Release Candidate  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

    See also

    Document Tags and Contributors

    Last updated by: Mingun,
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