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Regular Expression to remove JavaScript / CSS from HTML source

Posted on 2006-10-29
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Last Modified: 2013-11-19
So far I have a regex that I use to strip the HTML tags from a page however this doesnt work correctly with CSS and JavaScript...

Im looking for a regular expression to remove script (javascript, etc) and styles from the html source i have in a local string variable

examples of what i need to remove:

[style type="text/css"] blah [/style]
[style] blah [/style]
[script language="JavaScript"] blah [/script]
[script type="text/javascript"] blah [/script]

is this possible w/ regexp?
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Question by:mcainc
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8 Comments
 

Author Comment

by:mcainc
ID: 17832127
i'm using vb.net by the way (that is if there is a different method for doing this)
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LVL 84

Accepted Solution

by:
ozo earned 500 total points
ID: 17832137
"\\[style.*?\\]/style\\]"
"\\[script.*?\\[/script\\]"
but are you sure that your tags use [] and not <>?
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Author Comment

by:mcainc
ID: 17832175
i didn't know i could post < > on here so i just used [ ] instead...
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Author Comment

by:mcainc
ID: 17832182
hmm.. can you clean this up a bit with <> tags
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LVL 84

Expert Comment

by:ozo
ID: 17832199
"<style.*?</style>"
"<script.*?</script>
0
 

Author Comment

by:mcainc
ID: 17832235
hmm, this doesn't seem to work:

here is the function returning a string

    Public Function RemoveStyleBlocks(ByVal strSource As String) As String
        Return Regex.Replace(strSource, "<style.*?</style>", "")
    End Function

i have a function that works for removing html tags for your reference, perhaps something else is required in your script/style regex?

    Public Function RemoveHTMLTags(ByVal strSource As String) As String
        Return Regex.Replace(strSource, "<[^>]*>", "")
    End Function
0
 
LVL 84

Expert Comment

by:ozo
ID: 17832263
if strSource spans multiple lines
Regex.Replace(strSource,"<style.*?</style>", "",RegexOptions.Singleline)
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Author Comment

by:mcainc
ID: 17832270
ah great, that appears to work perfectly... thank you!
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