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Highlighting HTML string that spans tags

 
Greenhorn
Posts: 6
Mac Linux
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I need to search for a string of text, ideally using a regular expression, and then highlight the string by changing the background color (probably using a <span> tag). I have found solutions that will highlight individual words, but none seem to search across tags and apply the span tag in a way that doesn't corrupt the html. Any ideas?
Thanks.
 
Don't get me started about those stupid light bulbs.
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