javascript replace with regexp

Question

I have a string that contains a lot of

<span style="font-size:8px;">...</span> 
<span style="font-size:14px;"> ...</span>

And i want to replace all font-size values to given value. So i need a regexp to replace all chars beetween "font-size:" and "px;"

P.s. i use Rangy JS library

var iframe = $('iframe')[0];
            var sel =  rangy.getIframeSelection(iframe);
            selected_html=sel.toHtml();
            selected_html.replace("font-size:<some regexp>px;", "36");

Can you suggest a proper regexp?

Where is the string coming from? I suggest you get rid of the inline styles, add a class and do it in css. — elclanrs
– elclanrs, Commented Oct 24, 2012 at 7:57
Don't use regex for html. You're using rangy already, why not modify the attributes on the nice DOM nodes it returns instead of regexing html? — user1726343
– user1726343, Commented Oct 24, 2012 at 7:57

Anirudha · Accepted Answer · 2012-10-24 08:10:49Z

3

.replace(/(font-size:)\d+(px;)/g, "$1"+36+"$2");

edited Oct 24, 2012 at 8:10

Anirudha

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answered Oct 24, 2012 at 8:02

Damask

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3 Comments

Anirudha Over a year ago

nice but you should add some explanation!

yasaricli Over a year ago

$1 == (font-size:) && $2 == (px;) nice Answer.

le3th4x0rbot Over a year ago

Better allow some spaces. To keep the spaces use: .replace(/(font-size:\s*)\d+(\s*px;)/g, "$1"+36+"$2"); Otherwise: .replace(/(font-size:)\s*\d+\s*(px;)/g, "$1"+36+"$2");

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