Common regular expression (character)

Check the mailbox Regular Expressions

  // check mailbox rule 
    var The checkEmail = (the rules, value, the callback) => { 
      const regEmail + @ + ([A-zA-Z0-9_-] = / ^ ([A-zA-Z0-9 _-]) ) + ([\. [a-zA-Z0-9 _-]]) + /
       IF (regEmail.text (value)) {
         return the callback () 
      } 
      the callback ( new new error ( "Please enter a valid mailbox ' )) 
    }

Check the phone number regular expression

  // check rules phone 
    var checkMobile = (the rules, value, CB) => { 
      const regMobile = / ^ (0 | 86 | 17951) (13 is [0-9] |? 15 [012 356 789] |. 17 [678] | 18 is [0-9] | 14 [57 is] |. 19 [0267]) [0-9]. 8} {$ /
       IF (regMobile.text (value)) {
         return CB () 
      } 
      CB ( new new error ( 'enter legitimate phone number ' )) 
    }

Check fixed phone number regular expression

// check the fixed telephone number 
 var checkTel = (the rules, value, CB) => { 
      const regtel = / ^ (\ (\ D {3,4-} \) | \ D {3,4-} - | \ S) ? \ d {7, 14} $ / .test (tel)
       IF (regtel.text (value)) {
         return cb () 
      } 
      cb ( new new error ( 'Please enter a valid phone number' )) 
    }

Check identity documents regular expressions

 // check rule ID 
  var checkIDcard = (the rules, value, CB) => { 
    const regIDcard = (^ \ D {15} $) | (^ \. 17} {D ([0-9] | X-) $ )
     IF (regIDcard.text (value)) {
       return CB () 
    } 
    CB ( new new error ( "Please enter a valid ID number ' )) 
  }

Other common

Extracting information network link : (H | H) (R & lt | R & lt) (E | E) (F | F.) * * = ( '| ") (\ W | \\ | \ / | \.) +? ( '| " ? | * |>)
 
to extract information in the e-mail address : \ w + ([- +.] \ w +) * @ \ w + ([-.] \ w +) * \ \ w + (. [-.] \ w +) *
 
extracted information image links : (S | S) (R & lt | R & lt) (C | C) * = * ( '| ") (\ W | \\ | \ / | \) + (?. ? '| "| * |> ) 

to extract information in the IP address : (\ d +) \ (\ d +) \ (\ d +) \ (\ d +... )
 
extract information in Chinese telephone number (including mobile and fixed telephone) : (\ (\ D { ? 3,4-} \) | \ D {3,4-} - | \ S) \ D {7,14 }
 
extract information in China ZIP : [ 1-9] . 1} {(\ + D). 5 { }
 
extract information China ID number : \ D { 18 is} | \ D {15 }

Extract information integers : \ d + 

extract information floating point (ie decimal) : ( - \ d *?) \ \ D +.? 

Extract information in any number : ( -? \ D *) (\ \. ? d +) 

to extract information in Chinese string : [\ u4e00 - \ u9fa5] * 

information extracted double-byte strings (kanji) : [ ^ \ x00- \ xFF] *

**Use regular expressions**
method	description
`exec`	Performing a lookup in a method RegExp matching string, it returns an array (not match returns to null).
`test`	Test Method RegExp a match in the string, which returns true or false.
`match`	Find a matching String execution method in the string, it returns an array, when not to match returns null.
`matchAll`	Find all String methods to perform a match in the string, it returns an iterator (iterator).
`search`	Test method for matching a String in the string, it returns to the location index matched, or -1 on failure.
`replace`	Performing a lookup in a string matching method String, and used to replace the replace the substring matching string.
`split`	Using a regular expression or a character string separated by a fixed string, array and stores the substring to the partition `String` method.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Special characters

**The regular expression flags**
Mark	description
`g`	Global search.
`i`	Not case-sensitive search.
`m`	Multi-line search.
`s`	Allow `.` to match newline.
`u`	Use unicode mode code match.
`y`	The implementation of "sticky" search, matching the current position of the target from the beginning of the string, you can use the y flag.

character	meaning
\	As I turn, which is usually in the "\" character is not back by the original interpretation of the meaning, such as / b / matches the character "b", when in front of b plus a backslash after the / \ b /, I turn to match a word border. - or - of regular expressions restore feature characters such as "" to match it front metacharacters zero or more times, / a / will match a, aa, aaa, plus the "\" after, / a \ * / will match only "a *".
^	Matches the beginning of a line or input, / ^ a / match "an A", without matching "An a"
$	Or the end of a match input line, / a $ / matching "An a", instead of matching "an A"
*	Match front metacharacters zero or more times, / ba * / will match b, ba, baa, baaa
+	Matches the previous meta character one or more times, / ba * / will match ba, baa, baaa
?	Match front metacharacters 0 or 1, / ba * / will match b, ba
(x)	Match x save x in a variable named $ 1 ... $ 9
x \| and	Match x or y
{n}	Exact match n times
{n,}	N times more than match
{n,m}	Matching nm times
[xyz]	The character set (character set), matches any of the one set of a character (or character-membered)
[^xyz]	It does not match any of the characters in this set
[\b]	Matching a backspace
\b	Matches a word boundary
\B	Matches a non-word boundary
\cX	Here, X is a control character, / \ cM / Ctrl-M Match
\d	Matches a word character, / \ d / = / [0-9] /
\D	A non-character words match, / \ D / = / [^ 0-9] /
\n	Matches a newline
\r	A carriage return match
\s	Matching a blank character, including \ n, \ r, \ f, \ t, \ v etc.
\S	匹配一个非空白字符，等于/[^\n\f\r\t\v]/
\t	匹配一个制表符
\v	匹配一个重直制表符
\w	匹配一个可以组成单词的字符(alphanumeric，这是我的意译，含数字)，包括下划线，如[\w]匹配"$5.98"中的5，等于[a-zA-Z0-9]
\W	匹配一个不可以组成单词的字符，如[\W]匹配"$5.98"中的$，等于[^a-zA-Z0-9]。

使用方式

用re = new RegExp("pattern",["flags"]) 的方式比较好
pattern : 正则表达式
flags: g （全文查找出现的所有 pattern）
i （忽略大小写）
m （多行查找）

vaScript动态正则表达式问题

请问正则表达式可以动态生成吗?
例如JavaScript中:
var str = "strTemp";
要生成:
var re = /strTemp/;
如果是字符连接:
var re = "/" + str + "/"即可
但是要生成表达式,可以实现吗?怎样实现?

Common regular expression (character)

Guess you like