Question

I am trying to make a regex to find any element that has a specific class.

For example

<span class = "float">

For which I came up with this:

\s*class\s*=\s*('|")\s*float\s*('|")\s*

But then of course you can have multiple CSS declared

<span class = "float align cssnames">

I am not sure how you would make everything else optional.

Answer 1

Maybe \s*class\s*=\s*('|")[\w\s]*\bfloat\b[\w\s]*('|")\s*?

In between the quotes it looks for float with a word boundary on either side, possibly surrounded by further word characters and/or spaces (i.e. other CSS classes).