Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.

F12 c onsole.log显示上面的警告；

警告引起原因，是因为在使用<script ……></script>这种方式引入的js 中使用了ajax .

而一般来讲，在这种情况下，async 应该设置为true 而不是flase.

Google 了好多解决，这算是个总结吧。

参考：https://stackoverflow.com/questions/24639335/javascript-console-log-causes-error-synchronous-xmlhttprequest-on-the-main-thr

 

文章来源：刘俊涛的博客

地址：http://www.cnblogs.com/lovebing

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