file_doublewrappedcompartments.html

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<html>

    <head>

        <script>

            // We want to put an expando on the object, but we want this object

            // to be wrapped in other compartments. This means that the expando

            // must implement precreate, which happens (in general) for nodes.

            // So we just do a cyclic reference to the document body.

            window.expando = document.documentElement;

        </script>

    </head>