JS Regular expression

Regular expressions

1. mode

/reg/i Ignore Case

/reg/g, Get all

/reg/m, can put \ n as multiple lines

2. Brackets

[] or

[^] except

lin[^ux]x; can match to Lin X , meaning that the spaces here are contained in [^ux] in

3. parentheses

() delineation range

Backward reference

$ , A string that represents the first parenthesis in a match

4. Meta- characters

. any character except for the line break

\w a character that represents any number of letters and underscores [a-za-z0-9_]

\w represents other characters except for numeric letters and underscores [^a-za-z0-9_]

\d Find Numbers [0-9]

\d find non-numeric characters [^0-9]

\s Find white space characters   []

\s find non-whitespace characters   [^]

\ n Find line breaks  

\b represents the word boundary, which must be space on both sides of the word /\bp.p\b/ig

\b represents a non-word boundary

\xxx octal

\XDD hexadecimal

\uxxx Chinese Code

5. quantifiers

? 1 one or 0 a {0,1}

+1 one or more {1,}

* 0 a 1 one or more {0,}

.* blur matches multiple characters

.*? Exact Match

{n} n

{1,n} 1 to the N a

End   $

beginning   ^

(? =n) match the subsequent existence N part of

(!? =n) above counter-

This article is from the "rcid" blog, make sure to keep this source http://13419255.blog.51cto.com/13409255/1975760

JS Regular expression