Html comments Symbols for marking text comments in Html_HTML/Xhtml_Web page production

HTML comments, we often need to make some HTML comments next to some codes. This has many benefits, such as: easy to find, easy to compare, convenient for other programmers in the project team to understand your code, and it will be convenient in the future. Your understanding and modification of your own code, etc.

Start using HTML comments

HTML comment syntax

Example

Copy code

The code is as follows:

The following is a more comprehensive list for everyone

Copy code

The code is as follows:

1.
2. //Comment content (insert single-line comments in css or javascript)
3. /*comment content*/ (insert multi-line comments in css or javascript)

JavaScript Comments

JavaScript Comment Syntax

Copy Code

The code is as follows:

//Comment content
/*
Comment content
*/

CSS comments

As described in the HTML tutorial, comments also play a very important role in CSS documents, which can help us remember the meaning of CSS and the location where it is loaded in the HTML document. etc.

Start using /* and end using */ for CSS comments

CSS comment syntax

Copy the code

The code is as follows:

/* Comment content*/
Example
/* ----------Text style Start ---------- */
/* White 12 pixel text*/
.dreamduwhite12px
{
color:white;
font-size:12px;
}
/* Black 16 pixel text*/
.dreamdublack16px
{
color:black;
font-size:16px;
}
/* ----------End of text style---------- */

JavaScript comment example

Comment lines using two double slashes

[code]
//document.write("www.jb51.net");
Comment blocks of code (multiple lines) using slash stars )

/*
var jb51 = "www.jb51.net";
var jb51 = "du";
*/
[html]

Tip: Too many JavaScript comments will reduce JavaScript execution and loading speed, so JavaScript comments should be removed when publishing the website.

Tip: There cannot be (/* or */, this kind of code may be generated in JavaScript regular expressions) in the comment block (/* ... */), which will cause syntax errors, so I recommend You use // as comment code, and // will be used throughout this tutorial to mark comments.