MSDN Library

join Method (JavaScript)

Returns a string value consisting of all the elements of an array concatenated together and separated by the specified separator string.



Required. An Array object.


Optional. A String object used to separate one element of an array from the next in the resulting String object. If omitted, the array elements are separated with a comma.

If any element of the array is undefined or null, it is treated as an empty string.

The following example illustrates the use of the join method.

function JoinDemo(){
   var a, b;
   a = new Array(0,1,2,3,4);
   b = a.join("-");

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards. See Version Information.

Applies To: Array Object (JavaScript)

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