How can I create an Asynchronous function in Javascript?

哈哈：）我的codepen 的代码笔记是：http://codepen.io/shinewaker/pen/eBwPxJ

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I mean, check it out this code : <a href="#" id="link">Link</a> <span>Moving</span> $('#link').click(function () { console.log("Enter"); $('#link').animate({ width: 200 }, 2000, function() { console.log("finished"); }); console.log("Exit"); }); as you can see in console, the "animate" function is Asynchronous, and it "fork" the flow of the event handler block code. In fact : $('#link').click(function () { console.log("Enter"); asyncFunct(); console.log("Exit"); }); function asyncFunct() { console.log("finished"); } follow the flow of the block code! If I wish to create my function asyncFunct() { } with this behaviour, how can I do it with javascript/jquery? I think there is a strategy without use setTimeout() ​

You cannot make a truly custom asynchronous function. You'll eventually have to leverage on a technology provided natively, such as:

• setInterval
• setTimeout
• requestAnimationFrame
• XMLHttpRequest
• WebSocket
• Worker
• Some HTML5 APIs such as the File API, Web Database API
• Technologies that support onload
• ... many others

In fact, for the animation jQuery uses setInterval.