javascript javascript中事件处理程序的异步或同步调用
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Asynchronous or Synchronous calling of event handlers in javascript
提问by sachinjain024
Are event handlers executed synchronously or asynchronously in JavaScript? Here is JS binwhich is showing that event handler is executed synchronously.
JavaScript 中的事件处理程序是同步执行还是异步执行？这是JS bin，它显示事件处理程序是同步执行的。
Code:
代码：
$('#toclick').bind('custom', function() {
for (var i=0; i<100000; i++) {}
console.log('Inside click handler');
});
$('#toclick').trigger('custom');
console.log('Outside click handler');
Output:
输出：
Inside click handler
Outside click handler
This means if we trigger an event, the code below it won't be executed unless all the event handlers are executed. Am I right ?
这意味着如果我们触发一个事件，除非所有事件处理程序都被执行，否则它下面的代码不会被执行。我对吗 ？
采纳答案by freakish
That's correct. All event handlers are fired synchronously and in order of binding.
没错。所有的事件处理程序都是按绑定顺序同步触发的。
回答by Dimitris Zorbas
Some event handlers are executed synchonously and others asynchronously. See DOM-Level-3-Events
一些事件处理程序是同步执行的，而另一些则是异步执行的。见DOM-Level-3-Events
