Solved

JavaScript/REGEX: Close all BR Tags

Posted on 2012-04-10
5
417 Views
Last Modified: 2012-04-19
Using JavaScript and REGEX, how can I close all BR tags?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>

<script type="text/javascript">
var str = '<br>This is a test <br > and ONLY a test<br class="xyz">.  All BR tags <br /> should be proporly closed. ';

alert( closeBR(str) );

function closeBR(str) {
return str;
}

</script>
</head>
<body>
</body>
</html>

Open in new window

0
Comment
Question by:hankknight
  • 3
  • 2
5 Comments
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 150 total points
ID: 37828054
Try:

function closeBR(str) {
    return str.replace(/<br *>/g, '<br />');
}

Open in new window

0
 
LVL 42

Accepted Solution

by:
David S. earned 350 total points
ID: 37830811
Here's one way to do it (which will work in very old browsers):
function closeBR(str) {
  return str.replace(/(<br[^>]*)>/gi,'$1 />').replace(/[\s\/]+ \/>/g,' />');
}

Open in new window

Here's another which uses a single expression and works in browsers in use today:
function closeBR(str) {
  return str.replace(/(<br[^>]*?)\s*\/?>/gi,'$1 />');
}

Open in new window

@kaufmed  Your code doesn't take into account the case when the element has an attribute.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37830822
No it does not, but I can't recall the last time I've seen a line break which had attributes (though I acknowledge it can take them).
0
 
LVL 42

Expert Comment

by:David S.
ID: 37830837
I pointed it out because Hank included one such instance in his example. Also he (or someone else who reads this) might want to use the same expression/function to do the same thing for other empty elements, e.g. <img> elements.

Once in a while I see a newbie that gives an attribute to <br> elements.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 37831979
So he did. I simply overlooked it. Good eye  = D
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article shows how to create and access 2-dimensional arrays in JavaScript.  It includes a tutorial in case you are just trying to "get your head wrapped around" the concept and we'll also look at some useful tips for more advanced programmers. …
Boost your ability to deliver ambitious and competitive web apps by choosing the right JavaScript framework to best suit your project’s needs.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now