Learning notes for callback functions in js _ javascript tips-js tutorial

This article mainly introduces the knowledge of callback functions in js. If you need a callback function, you can refer to the callback function. Before learning it, you really don't know how to use and use the js callback function, in the following article, I will introduce the callback function examples to you. If you have any questions, please refer to them.

Callback function principle:

I am leaving now, to inform you"
This is an asynchronous process. In the process of "I am going" (function execution), "you" can do anything and "now" (function execution is complete) "notify you" (callback) after the process

Example

1. Basic Methods