Question

71

How to get regex to match multiple script tags?

rated 0 times [ 78] [ 7] / answers: 1 / hits: 48866 / 15 Years ago, thu, september 17, 2009, 12:00:00

I'm trying to return the contents of any tags in a body of text. I'm currently using the following expression, but it only captures the contents of the first tag and ignores any others after that.

Here's a sample of the html:

    <script type=text/javascript>

        alert('1');

    </script>



    <div>Test</div>



    <script type=text/javascript>

        alert('2');

    </script>

My regex looks like this:

//scripttext contains the sample

re = /<scriptb[^>]*>([sS]*?)</script>/gm;

var scripts  = re.exec(scripttext);

When I run this on IE6, it returns 2 matches. The first containing the full tag, the 2nd containing alert('1').

When I run it on http://www.pagecolumn.com/tool/regtest.htm it gives me 2 results, each containing the script tags only.

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arturo

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3 Years ago

answered 15 Years ago jameson · Accepted Answer

The problem here is in how exec works. It matches only first occurrence, but stores current index (i.e. caret position) in lastIndex property of a regex. To get all matches simply apply regex to the string until it fails to match (this is a pretty common way to do it):

var scripttext = ' <script type=text/javascript>nalert('1');n</script>nn<div>Test</div>nn<script type=text/javascript>nalert('2');n</script>';



var re = /<scriptb[^>]*>([sS]*?)</script>/gm;



var match;

while (match = re.exec(scripttext)) {

  // full match is in match[0], whereas captured groups are in ...[1], ...[2], etc.

  console.log(match[1]);

}