结束标签到开始标签之间的Javascript reg exp

Question

How do I select with Regular Expression the text after the </h2> closing tag until the next <h2> opening tag

<h2>my title here</h2>
Lorem ipsum dolor sit amet <b>with more tags</b>
<h2>my title here</h2>
consectetur adipisicing elit quod tempora

In this case I want to select this text: Lorem ipsum dolor sit amet <b>with more tags</b>

Answer 1

Try this: /<\\/h2>(.*?)</g

This finds a closing tag, then captures anything before a new opening tag.

in JS, you'd do this to get just the text:

substr = str.match(/<\/h2>(.*?)<h2/)[1];

Regex101

 var str = '<h2>my title here</h2>Lorem ipsum <b>dolor</b> sit amet<h2>my title here</h2>consectetur adipisicing elit quod tempora'; var substr = str.match(/<\\/h2>(.*?)<h2/)[1].replace(/<.*?>/g, ''); console.log(substr); //returns: Lorem ipsum dolor sit amet

Answer 2

Try

/<\/h2>((?:\s|.)*)<h2/

And you can see it in action on this regex tester .

You can see it in this example below too.

 (function() { "use strict"; var inString, regEx, res, outEl; outEl = document.getElementById("output"); inString = "<h2>my title here</h2>\\n" + "Lorem ipsum dolor sit amet <b>with more tags</b>\\n" + "<h2> my title here </h2>\\n" + "consectetur adipisicing elit quod tempora" regEx = /<\\/h2>((?:\\s|.)*)<h2/ res = regEx.exec(inString); console.log(res); res.slice(1).forEach(function(match) { var newEl = document.createElement("pre"); newEl.innerHTML = match.replace(/</g, "&lt;").replace(/>/g, "&gt;"); outEl.appendChild(newEl); }); }());

 <main> <div id="output"></div> </main>

I added \\n to your example to simulate new lines. No idea why you aren't just selecting the <h2> with a querySelector() and getting the text that way.

Answer 3

Match the tags and remove them, by using string replace() function. Also this proposed solution removes any single closure tags like <br/>,<hr/> etc

 var htmlToParse = document.getElementsByClassName('input')[0].innerHTML; var htmlToParse = htmlToParse.replace(/[\\r\\n]+/g,""); // clean up the multiLine HTML string into singleline var selectedRangeString = htmlToParse.match(/(<h2>.+<h2>)/g); //match the string between the h2 tags var parsedString = selectedRangeString[0].replace(/((<\\w+>(.*?)<\\/\\w+>)|<.*?>)/g, ""); //removes all the tags and string within it, Also single tags like <br/> <hr/> are also removed document.getElementsByClassName('output')[0].innerHTML += parsedString;

 <div class='input'> <i>Input</i> <h2>my title here</h2> Lorem ipsum dolor sit amet <br/> <b>with more tags</b> <hr/> <h2>my title here</h2> consectetur adipisicing elit quod tempora </div> <hr/> <div class='output'> <i>Output</i> <br/> </div>

Couple of things to remember in the code.

htmlToParse.match(/(<h2>.+<h2>)/g); returns an array of string, ie all the strings that was matched from this regex.

selectedRangeString[0] I am just using the first match for demo purspose. If you want to play with all the strings then you can just for loop it with the same logic.