Regular expression of JavaScript

There are two ways to create a regular expression:

1. Literal quantity

1 var re =/ab+c/;

2. Call the constructor of the RegExp object

1 var re = RegExp ("Ab+c");

Second, special characters

• ^ Start of match input
• $ match end of input
• * Match a previous character 0 or more times
• + Match a previous character 1 or more times
• ？ Match a previous character 0 or 1 times
• . Matches any single character except the beginning of a new line
• {n} repeats n times
• {n,m} repeats n-m times
• [ASD] A character set that fits any character
• [^ASD] anti-character set
• [\b] matches a push grid
• \d Match a number
• \d matches a non-numeric character
• \f Match a page break
• \ n matches a line break
• \ r matches a carriage return character
• \s matches a white space character, including spaces, tabs, page breaks, and line breaks
• \s matches a non-whitespace character

　　

Regular expression of JavaScript