Is there a way to comment multiple lines... which already have some comments in them?
i.e.
<html>
<!-- Multi-line comment begin
<head>
<!-- This script does abcxyz -->
<script>...</script>
</head>
<body>
Hello world!
</body>
Multi-line comment end -->
</html>
It seems that even SO's syntax hilighting won't accept this...
I think the key point is this:
Note that comments are markup.
http://www.w3.org/TR/html4/intro/sgmltut.html#h-3.2.4
This is not valid markup:
<div <span/> />
... so neither is the one you mention.
Since all my sites are written in PHP I normally comment out code with PHP comments:
<?/*?>
<div>...</div>
<p>...</p>
<?*/?>
Perhaps you can use a similar trick.
No. Comments cannot be nested and HTML has only one style of comment.
No. The closing comment tag --> will always end the comment section so if your comment includes a comment the closing tag of your included comment will end the comment section.
You can do a replace of --> in the section you are about to comment out to something unique so you can later just do another replace back to --> if you choose to undo your commenting.
If you're really stuck with some piece of HTML – pre-rendered at some uncontrollable source – which contains comments, and you need to make sure none of it is rendered on your page, you can always wrap it with a script tag like below, only thing is, you can't comment out script tags this way.
<html>
<head>
</head>
<body>
<!-- multiline "comment" below using script type="text/html" -->
<script type="text/html">
Hello world!
<!-- Look at me, I'm a comment :) -->
<div>Yeah, whatever, I'm an element..</div>
</script>
<span>Who cares, span is the man, the only visible one anyway!</span>
</body>
</html>If you need to comment out script tags, you could use a textarea as wrapper instead, off course doing it this way, you can't comment out textarea tags.
<html>
<head>
</head>
<body>
<!-- multiline "comment" below using textarea style="display:none;" -->
<textarea style="display:none;">
<script>
alert("which won't show up..");
</script>
Hello world!
<!-- Look at me, I'm a comment :) -->
<div>Yeah, whatever, I'm an element..</div>
</textarea>
<span>Who cares, span is the man, the only visible one anyway!</span>
</body>
</html>
it may still be useful for some developers, if use use vsCode as your IDE you can use an extension named Nest Comments in visual studio code market which work like a charm.
this is the link Nest Comments
One can embed it in single or double quotes as a tag attribute. This requires then of course that the corresponding quotes are not occurring in between.
<html>
<br comm='Multi-line comment begin
<head>
<!-- This script does abcxyz -->
<script>...</script>
</head>
<body>
Hello world!
</body>
Multi-line comment end'>
</html>
