javascript - 正则表达式:如何选择两个标题之间的所有内容？

Question

我想选择任意两个标题之间的内容。

我已经创建了这个正则表达式，它并没有真正选择我需要的东西。目前，它会选择标题和段落，而不是最后一个标题。

当前正则表达式:/^<h.*?(?:>)(.*?)(?=<\h)/gms

给定的字符串:

<h2>What is lorem impsum</h2>
Stack overflow is a great community for developers to seek help and connect the beautiful experience.

<h3>What is quora?</h3>
Quoora is good but doesn\'t provide any benefits to the person who\'s helping others economically. 
But its a nice place to be at.
another paragraph betwen these headings

<h3>Who is Kent C Dodds</h3>
One of the best guy to learn react with. He also has helped a lot of 
people with his kindness and his contents on the internet.

预期结果:

[
    'Stack overflow is a great community for developers to seek help and connect the beautiful 
    experience.',

    'Quoora is good but doesn't provide any benefits to the person who's helping others economically. 
    But it\'s a nice place to be at.
    another paragraph betwen these headings',

   'One of the best guy to learn react with. He also has helped a lot of 
    people with his kindness and his contents on the internet.'

]

Answer 1

如果你想在不捕获的情况下获得匹配:

/(?<=<\/h\d+>\s*)\S.*?(?=\s*<h\d|$)/gs

参见 proof

const text = `<h2>What is lorem impsum</h2>
Stack overflow is a great community for developers to seek help and connect the beautiful experience.

<h3>What is quora?</h3>
Quoora is good but doesn\'t provide any benefits to the person who\'s helping others economically. 
But its a nice place to be at.
another paragraph betwen these headings

<h3>Who is Kent C Dodds</h3>
One of the best guy to learn react with. He also has helped a lot of 
people with his kindness and his contents on the internet.`;
const regex = /(?<=<\/h\d+>\s*)\S.*?(?=\s*<h\d|$)/gs;
console.log(text.match(regex));

如果您需要更高效的正则表达式，请使用捕获:

const text = `<h2>What is lorem impsum</h2>
Stack overflow is a great community for developers to seek help and connect the beautiful experience.

<h3>What is quora?</h3>
Quoora is good but doesn\'t provide any benefits to the person who\'s helping others economically. 
But its a nice place to be at.
another paragraph betwen these headings

<h3>Who is Kent C Dodds</h3>
One of the best guy to learn react with. He also has helped a lot of 
people with his kindness and his contents on the internet.`;
const regex = /<\/h\d+>\s*([^<]*(?:<(?!h\d)[^<]*)*?)\s*(?:<h\d|$)/g;
console.log(Array.from(text.matchAll(regex), x => x[1].trim()));

第二个正则解释:

--------------------------------------------------------------------------------
  <                        '<'
--------------------------------------------------------------------------------
  \/                       '/'
--------------------------------------------------------------------------------
  h                        'h'
--------------------------------------------------------------------------------
  \d+                      digits (0-9) (1 or more times (matching
                           the most amount possible))
--------------------------------------------------------------------------------
  >                        '>'
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    [^<]*                    any character except: '<' (0 or more
                             times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    (?:                      group, but do not capture (0 or more
                             times (matching the least amount
                             possible)):
--------------------------------------------------------------------------------
      <                        '<'
--------------------------------------------------------------------------------
      (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
        h                        'h'
--------------------------------------------------------------------------------
        \d                       digits (0-9)
--------------------------------------------------------------------------------
      )                        end of look-ahead
--------------------------------------------------------------------------------
      [^<]*                    any character except: '<' (0 or more
                               times (matching the most amount
                               possible))
--------------------------------------------------------------------------------
    )*?                      end of grouping
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  (?:                      group, but do not capture:
--------------------------------------------------------------------------------
    <h                       '<h'
--------------------------------------------------------------------------------
    \d                       digits (0-9)
--------------------------------------------------------------------------------
   |                        OR
--------------------------------------------------------------------------------
    $                        before an optional \n, and the end of
                             the string
--------------------------------------------------------------------------------
  )                        end of grouping