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Enumerator Object (JavaScript)

Enables enumeration of items in a collection.

Caution noteCaution

This object is supported in Internet Explorer only.

enumObj = new Enumerator([collection]) 


Required. The variable name to which the Enumerator object is assigned.


Optional. Any Collection object.

Collections differ from arrays in that the members of a collection are not directly accessible. Instead of using indexes, as you would with arrays, you can only move the current item pointer to the first or next element of a collection.

The Enumerator object provides a way to access any member of a collection and behaves similarly to the For...Each statement in VBScript.

The following code shows the usage of the Enumerator object:

function ShowDrives()
    var s = "";
    var bytesPerGB = 1024 * 1024 * 1024;

    var fso = new ActiveXObject("Scripting.FileSystemObject");
    var e = new Enumerator(fso.Drives);

    while (e.atEnd() == false)
        var drv = e.item();

        s += drv.Path + " - ";

        if (drv.IsReady)
            var freeGB = drv.FreeSpace / bytesPerGB;
            var totalGB = drv.TotalSize / bytesPerGB;

            s += freeGB.toFixed(3) + " GB free of ";
            s += totalGB.toFixed(3) + " GB";
            s += "Not Ready";

        s += "<br />";


The Enumerator object has no properties.

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.

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