正则表达式 – 这是什么意思？使用表达式匹配什么字符串？

发布时间：2020-12-14 05:50:07 所属栏目：百科来源：网络整理

导读：我查看了sizzle代码并查看了一个定义. var chunker = /((?:((?:([^()]+)|[^()]+)+)|[(?:[[^[]]*]|['"][^'"]*['"]|[^[]'"]+)+]|.|[^ +~,([]+)+|[+~])(s*,s*)?((?:.|r|n)*)/g, 我想知道如何找出这个正则表达式匹配的字符串？解决方法请

我查看了sizzle代码并查看了一个定义.

var chunker = /((?:((?:([^()]+)|[^()]+)+)|[(?:[[^[]]*]|['"][^'"]*['"]|[^[]'"]+)+]|.|[^ >+~,([]+)+|[>+~])(s*,s*)?((?:.|r|n)*)/g,

我想知道如何找出这个正则表达式匹配的字符串？

解决方法

请参见 this article.多行正则表达式中的说明：

var chunker = /
 (
  (?:
   # One or more sets of parentheses that contain a string,or another set of 
   parentheses with a string
   (
   (?:
    ([^()]+)
    |
    [^()]+
   )+
   )
   |
   # Or one or more sets of brackets that contain a string,or another set of
   brackets with a string
   [
   (?:
    [[^[]]*]
    |
    ['"][^'"]*['"]
    |
    [^[]'"]+
   )+
   ]
   |
   # Or a backslash followed by any character
   .
   |
   # Or one or more of any except these characters: > +~,([
   [^ >+~,([]+
  )+
  # or any one of these characters: >+~
  |
  [>+~]
 )
 # followed by zero or one commas,which may be surrounded by whitespace
 (s*,s*)?
 # followed by zero or more of anything,including line endings
 ((?:.|r|n)*)
/g

此表达式包含三个匹配组：“已验证”选择器表达式,最终逗号以及之后的所有内容.它将在选择器上连续调用以将其分成几部分,有关详细信息,请参阅Sizzle构造函数.

（编辑：李大同）

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