replace multiple <br> tags with javascript

2018-07-03 18:09:53

This question already has an answer here:

How to replace all occurrences of a string in JavaScript? 41 answers

You have specified that it's in document.body , so in the DOM. Then you can (and you should) use DOM methods:

var siblingBrs = [].slice.call( document.querySelectorAll('br + br') );
siblingBrs.forEach( function( br ){
    br.parentNode.removeChild( br );
});

http://jsfiddle.net/jL8jkkt0/

Notice it's agnostic to the string representation of a <br /> element in the source code.

BTW if it's only for display purposes (to avoid visual gap) you can just use CSS:

br + br { display:none; }

http://jsfiddle.net/jL8jkkt0/1/

Try the following:

var stripped = original.replace(/(<brs*/?>){3,}/gi, '<br>');

Substituting different values here...

{3,}

...will allow you to control at what count the removal occurs.

Hope this helps!

首先获取HTML作为字符串，然后使用正则表达式替换它：

var s = document.body.innerHTML;
document.body.innerHTML = s.replace(/(<br[s]*/?>[s]*)+/g, '<br/>');

First Line<br><br /><br/><br><br /><br/>Second Line

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