如何将 html 文档末尾的一堆 p 标签与 javascript 正则表达式匹配？

Question

Here is a sample content:

<p> so so so </p>
<div> whatever</div
<p> another paragraph </p>
<div> forever </div>
<p> first of last </p>
<p> second of last </p>

How can I match the last two paragraphs (or any number of consecutive paragraphs) at the end of the above document?

The match output I want is:

<p> first of last </p>
<p> second of last </p>

I tried /(<p>[\s\S]*?<\/p>[\s]*)$/g , but the lazy matching is not working as expected, it sucks all the p tags in between, and matches from the first opening p tag it encounters up to the end of the document.

Note: there might not be paragraphs at the end at all, the regex should not match if there are no paragraphs at the end.

Answer 1

Here we use regex to match all paragraphs and then take the last two elements of the result array.

 let str = `<p> so so so </p> <div> whatever </div <p> another paragraph </p> <div> forever </div> <p> first of last </p> <p> second of last </p>` let reg = /<p>[\w\s]*<\/p>/g; let res = str.match(reg); console.log(res[res.length-2]); console.log(res[res.length-1]);

Answer 2

Adding a negative look ahead to make sure nested paragraphs are not matched seems to do the trick:

/(<p>((??<p>)[\s\S])*?<\/p>[\s]*)+$/g

Would appreciate better suggestions though!