删除字符串中的特定html标签-javascript

Question

I'm trying to clean up a string of text on the server side from the output generated by a wysiwyg. and while I can fix it client side, it's best to also fix this on the server side.

var string = "<p>firstline</p><p>secondline</p><p>thirdline</p><p>iframe</p><p>a</p><p>df</p><p>dsf&nbsp;</p><p><br></p><p>sd</p><p>f</p><p>sdf</p><p><br></p>"

var x = string.replace("<p><br></p>", "");

https://jsfiddle.net/8c0yh9r7/

the code should but doesn't get rid of the break within the paragraphs

why is that?

Answer 1

Use a regex with a global flag, like:

 string.replace(/<p><br><\/p>/g, "");

https://jsfiddle.net/Lu2r3820/1/

When using a string only the first occurrence will be replaced.

See replace() documentation

Answer 2

doesn't get rid of the break within the paragraphs

Yes, it does… but only once . You have more than one paragraph containing a line break in your code.

If you want to replace it more than once, you need to use a regex and mark it as global with g .

var x = string.replace(/<p><br><\/p>/g, "");

Answer 3

It does replace, but only the first occurrence. If you run this afterwards, you can see the second occurrence disappearing.

var x = x.replace("<p><br></p>", "");

refer to this to replace all occurrences. How to replace all occurrences of a string in JavaScript?