webworker and iframeworker overwrap.
<script src="lib/WMIframeWorker.js"></script>
<script>
console.log( WMIframeWorker() );
</script>
importScripts("lib/WMIframeWorker.js");
console.log( WMIframeWorker() );
var WMIframeWorker = require("lib/WMIframeWorker.js");
console.log( WMIframeWorker() );