在下面的示例中,Web worker的代码中存在错误(未定义的引用),但是 try {...} catch(e){...} 没有太多关注。控制台上出现为什么我在这里?的消息。
HTML文件:
<html>
<body>
<script type="text/javascript">
var worker;
try {
worker = new Worker("foo.js");
console.log('Why am I here ?');
} catch (e) {
console.log('Error creating the worker.');
}
// No matter what, an object "worker" will created during the call to Worker()
// How to test that all went well
var worker_failed = false;
worker.addEventListener("error",
function(e) { worker_failed = true },
false);
// Is it correct to assume that "worker" is created asynchronously, and that checking
// that creation went well should not be sequential and the test below is not
// the way to do it ?
if ( worker_failed ) {
// Worker("foo.js") failed, switch to plan B
}
</script>
</body>
</html>
Web worker( foo.js ):
foobar = 2 + baz; // fails here (baz is undefined)
onmessage = function(e) {
var data = e.data;
postMessage(data);
};
答案 0 :(得分:1)
您可以异步处理工作人员中的错误。您需要收听工作人员的error
事件。
worker.addEventListener(“error”,onError,false);
有关于网络工作者here的精彩教程。您可以在handling errors
部分找到您要查找的内容。
您还可以查看官方html5 spec,了解有关浏览器应如何实施此功能的更多信息。