Js Pattern Matching

Pattern matching:

What is pattern matching: You can set the rules for finding or replacing!

When to use pattern matching: The keyword you are looking for may change regularly.

How to use pattern matching:

1. Define the mode first:/keyword/mode

For example: Var reg=/no/i;

No is to find the original text of the keyword without "" quotation marks

I means ignoring case!

The string type provides an API that specifically supports pattern matching.

Replace the keyword by mode: str = str.replace (Reg, "new value");

Default replace replaces only the FIRST keyword!

To replace globally, define "G" in the pattern;

Examples are as follows:

<! DOCTYPE html>
Js Pattern Matching