rajakvk rajakvk - 4 days ago 6
Javascript Question

Using HTML comment tag <!-- --> still relevant around JavaScript code?

Is it still relevant to use HTML comment tag around JavaScript code?

I mean

<html>
<body>
<script type="text/javascript">
//<!--
document.write("Hello World!");
//-->
</script>
</body>
</html>

Answer

HTML comments, ie. <!-- -->, are no longer needed. They were intended to allow browsers that didn't understand the <script> tag to degrade gracefully. These browsers, eg. Netscape 1.x are no longer found in the wild. So there is really no point in putting HTML comments in your script tags anymore.

If you want your HTML to validate as XHTML or XML, you probably want to use a commented out CDATA tag.


<script type="text/javascript">
//<![CDATA[
document.write("Hello World!");
//]]>
</script>

The reason for this is so your <, >, &, " and ' that are part of your javascript code won't have to be encoded as &lt;, &gt;, &amp;, &quot; and &apos; respectively.

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