Web Workers后台计数，这个错误是为什么

Question

Web Workers后台计数，这个错误是为什么

发布于
2016-06-03

更新于
2016-06-03

新手上路，请多包涵

<!DOCTYPE html>
<html>
<body>

<p>Count numbers: <output id="result"></output></p>
<button onclick="startWorker()">Start Worker</button>
<button onclick="stopWorker()">Stop Worker</button>
<br /><br />

<script>
var w;

function startWorker()
{
if(typeof(Worker)!=="undefined")
{
  if(typeof(w)=="undefined")
    {
    w=new Worker("demo_workers.js");
    }
  w.onmessage = function (event) {
    document.getElementById("result").innerHTML=event.data;
  };
}
else
{
document.getElementById("result").innerHTML="Sorry, your browser does not support Web Workers...";
}
}

function stopWorker()
{
w.terminate();
}
</script>

</body>
</html>

    var i=0;
function timeCount(){
    i=i+1;
    postMessage(i);
    setTimeout("timeCount()",500);
}
timeCount();

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