- Asynchronous, not hinder the execution of the code, it will wait for all of the synchronization code is finished, then execute their output synchronization results. (Native js, only a timer, DOM, ajax three things are asynchronous.)
- Synchronization, the code will only be executed from top to bottom, as long as the wrong step, following code will not be executed .
.Ajax (async and sync asynchronous synchronization)
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Origin www.cnblogs.com/luoluo-snow/p/11511109.html
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