HTML comments within comments?
Question
Is there a way to comment multiple lines... which already have some comments in them?
ie
<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...
7 answers
solution1
12 ACCPTED 2010-09-22 21:25:34
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.
solution2
7 2010-09-22 21:22:38
不可以。注释不能嵌套，HTML 只有一种注释样式。
solution3
5 2010-09-22 21:25:51
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.
solution4
4 2017-05-10 20:20:05
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>
solution5
3 2010-09-22 21:22:51
不，不幸的是 HTML 注释不嵌套。
solution6
0 2021-08-13 18:34:36
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>
solution7
-1 2020-04-13 18:19:34
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
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