sort Method (Array) (JavaScript)


Sorts an Array.



Required. Any Array object.


Optional. The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.

The sorted array.

The sort method sorts the Array object in place; no new Array object is created during execution.

If you supply a function in the sortFunction argument, it must return one of the following values:

  • A negative value if the first argument passed is less than the second argument.

  • Zero if the two arguments are equivalent.

  • A positive value if the first argument is greater than the second argument.


The following example shows how to use the sort method.

var a = new Array(4, 11, 2, 10, 3, 1);

var b = a.sort();

// This is ASCII character order.
// Output: 1,10,11,2,3,4)

// Sort the array elements with a function that compares array elements.
b = a.sort(CompareForSort);
// Output: 1,2,3,4,10,11.

// Sorts array elements in ascending order numerically.
function CompareForSort(first, second)
    if (first == second)
        return 0;
    if (first < second)
        return -1;
        return 1; 


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.