<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() );