jquery - AJAX .post 异步

Question

下面的具体作用是什么:

$.ajax({
     type: "POST",
     async: false,

对比

$.ajax({
    type: "POST",
    async: true,

这意味着行为有什么不同？

Answer 1

来自the jQuery site :

By default, all requests are sent asynchronously (i.e. this is set to true by default). If you need synchronous requests, set this option to false. Cross-domain requests and dataType: "jsonp" requests do not support synchronous operation. Note that synchronous requests may temporarily lock the browser, disabling any actions while the request is active.

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