什么是“异步:假"?在jQuery.ajax()中做什么? [英] What does "async: false" do in jQuery.ajax()?

问题描述

具体来说，它与默认值(async: true)有何不同?

Specifically, how does it differ from the default ( async: true ) ?

在什么情况下我想将async显式设置为false，它与防止页面上的其他事件触发有关系吗?

In what circumstances would I want to explicit set async to false, and does it have something to do with preventing other events on the page from firing ?

推荐答案

与它有关吗 防止页面上发生其他事件 开火?

Does it have something to do with preventing other events on the page from firing?

是的

将async设置为false意味着要调用的语句必须先完成，然后才能调用函数中的下一条语句.如果您设置async:true，则该语句将开始执行，而无论async语句是否已完成，都将调用下一条语句.

Setting async to false means that the statement you are calling has to complete before the next statement in your function can be called. If you set async: true then that statement will begin it's execution and the next statement will be called regardless of whether the async statement has completed yet.

有关更多信息，请参见: jQuery ajax成功匿名函数作用域

For more insight see: jQuery ajax success anonymous function scope

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