michael@0: onmessage = function(evt) {
michael@0:   if (evt.data != 0) {
michael@0:     var worker = new Worker('jsversion_worker.js');
michael@0:     worker.onmessage = function(evt) {
michael@0:       postMessage(evt.data);
michael@0:     }
michael@0: 
michael@0:     worker.postMessage(evt.data - 1);
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   let foo = 'bar';
michael@0:   postMessage(true);
michael@0: }