Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about how to reverse reference regular expressions in javascript. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

Recently encountered a requirement to pass in a string and insert a space for every three characters

Example:

Incoming abcd1234

Output abc d12 34

After thinking about it, I'm going to write a function as follows

The copy code is as follows:

Function appendSpace (s)

{

Var length = s.length

Var result = ""

Var last = 0

For (var I = 3X I)

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