<script src="lib/WMDataURIScheme.js"></script>
<script>
WMDataURIScheme.StringToDataURI("💩", "type/plain", function(err, dataURI){
  console.log(dataURI);
});
</script>

importScripts("lib/WMDataURIScheme.js");

WMDataURIScheme.StringToDataURI("💩", "type/plain", function(err, dataURI){
  console.log(dataURI);
});