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    This is an experimental technology, part of the ECMAScript 6 (Harmony) proposal.
    Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.


    The delete() method removes the specified element from a WeakSet object.




    Required. The object remove from the WeakSet object.

    Return value

    Returns true if an element in the WeakSet object has been removed successfully; otherwise false.


    Example: Using the delete method

    var ws = new WeakSet();
    var obj = {};
    ws.delete(obj);    // Returns false. No obj found to be deleted.
    ws.delete(window); // Returns true.  Successfully removed.
    ws.has(window);    // Returns false. The window is no longer present in the WeakSet.


    Specification Status Comment
    ECMAScript 6 (ECMA-262)
    The definition of 'WeakSet.prototype.delete' in that specification.
    Release Candidate Initial definition.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support 36 34 (34) Not supported 23 Not supported
    Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support Not supported 34.0 (34) Not supported Not supported Not supported

    See also

    Document Tags and Contributors

    Contributors to this page: realityking, fscholz, teoli
    Last updated by: realityking,