!7

html {

  if (eq(uri, "/worker.js"))

    ret [[

      postMessage("WORKING! Watch your CPU.");

      var startTime = new Date();

      var start = 0, i = start;

      while (true) {

        for (j = 0; j < 1000; j++) {}

        i = i+1;

        if ((i % 1000) == 0) {

          var ms = new Date()-startTime;

          var mips = ((i-start)/ms).toFixed(2);

          postMessage("Counted to: " + i + " in " + ms + " ms ("

            + mips + " million steps/s)");

        }

      }

    ]];

  ret htitle("Web Worker Test")

    + hbody(

      p("Count numbers: " + hfulltag("output", "", id := "result"))

    + p(hbutton("Restart Worker", onClick := "restart()"))

  + hjavascript([[

    var worker;

    function restart() {

      worker.terminate();

      go();

    }

    function go() {

      if (typeof(Worker) === "undefined") {

        document.getElementById("result").innerHTML = "Sorry, your browser does not support Web Workers...";

        return;

      }

      document.getElementById("result").innerHTML = "Making web worker";

      worker = new Worker($LINK);

      worker.onmessage = function(event) {

        document.getElementById("result").innerHTML = event.data;

      };

      //document.getElementById("result").innerHTML = "Worker made, starting";

      //worker.postMessage();

    }

  ]]).replace("$LINK", jsQuote(relativeRawBotLink(programID(), "worker.js"))), onLoad := "go()");

}