JavaScript正则表达式，匹配P但不匹配PARAM

Question

Using JavaScript RegEx.

How can I match a <p> element(including attributes), but not <param> or other HTML elements starting with a "P".

Answer 1

Try:

/(<p(?:\s+[^>]*)?>)/i

/
 (        #start capture group
  <p       #match '<p'
  (?:      #start non-capture group
    \s+     #match one or more white space characters
    [^>]*   #match zero or more characters that arent >
  )?       #end non-capture group - make it optional
  >        #match '>'
 )        #end capture group
/i        #end regexp - make case insensitive

Answer 2

/<p\b[^>]*>/i

\\b matches a word boundary; coming after the 'p' it means the next character (if there is a next character) is not a letter, digit or underscore.

Disclosure: [^>]* isn't really the correct way to match the rest of the tag, since attribute values can legally contain angle brackets. But it's probably good enough, and that's not what the question is about anyway.

Answer 3

<(p|P)([\\s].*)?>

seems to work good =). But you shouldn't use RegEx when you can use DOM, or even XML/XPath/whatever.

Answer 4

这是我的尝试：

/\<P(\s+\w+=\"?[^\"\s\>]*\"?)*\>/gi

Answer 5

/<(?:p|P)\s+/.exec(s);

尽管它与整个标签不匹配，但是考虑到属性中允许使用标签结束符号>，这相当复杂。