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POMatching a string only if it is not in <script> or <a> tags
 

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  1. POMatching a string only if it is not in <script> or <a> tags
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    <p>I'm working on a browser plugin that replaces all instances of "someString" (as defined by a complicated regex) with <code>&lt;a href="http://domain.com/$1"&gt;$1&lt;/a&gt;</code>. This generally works ok just doing a global replace on the body's innerHTML. However it breaks the page when it finds (and replaces) the "someString" inside <code>&lt;script&gt;</code> tags (i.e. as a JS variable or other JS reference). It also breaks if "someString" is already part of an anchor.</p> <p>So basically I want to do a global replace on all instances of "someString" unless it falls inside a <code>&lt;script&gt;&lt;/script&gt;</code> or <code>&lt;a&gt;&lt;/a&gt;</code> tag set.</p> <p>Essentially what I have now is:</p> <pre><code>var body = document.getElementsByTagName('body')[0].innerHTML; body = body.replace(/(someString)/gi, '&lt;a href="http://domain.com/$1"&gt;$1&lt;/a&gt;'); document.getElementsByTagName('body')[0].innerHTML = body; </code></pre> <p>But obviously that's not good enough. I've been struggling for a couple hours now and reading all of the answers here (including the many adamant ones that insist regex should not be used with HTML), so I'm open to suggestions on how to do this. I'd prefer using straight JS, but can use jQuery if necessary.</p> <p><strong>Edit - Sample HTML</strong>:</p> <pre><code>&lt;body&gt; someString &lt;script type="text/javascript"&gt; var someString = 'blah'; console.log(someString); &lt;/script&gt; &lt;a href="someString.html"&gt;someString&lt;/a&gt; &lt;/body&gt; </code></pre> <p>In that case, only the very first instance of "someString" should be replaced.</p>
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    1. COWhy the regex tag? As you already admit, it's not a job for regular expressions.
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    2. CO"someString" is defined by a complicated regex which I need to be able to do the match. There's no way I can get around that piece of it. Potentially the traversal/parent node type can be gleaned without using a regex, but I don't have a choice as far as the actual string matching goes.
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    3. CODo you only wish to replace this within text on the page?
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