Html comments Symbols for marking text comments in Html

HTML comments, we often need to make some HTML comments next to some codes. There are many benefits to doing so, such as: convenient search, convenient comparison, convenient for other programmers in the project team to understand your code, and convenient for you to understand and modify your own code in the future, etc.

HTML comments start with

HTML Comment Syntax

Example

Copy code

The code is as follows:

<a href="https://www.jb51.net">123WORDPRESS.COM</a>

Here is a more complete list for you

Copy code

The code is as follows:

1. 
2. //Comment content (insert single-line comments in CSS or JavaScript)
3. /*Comment content*/ (insert multiple lines of comments in CSS or JavaScript)

JavaScript Comments

JavaScript Comment Syntax

Copy code

The code is as follows:

//Comment content
/*
Note content
*/

CSS Comments

As described in the HTML tutorial, comments also play an important role in CSS documents, helping us remember the meaning of CSS, where it is loaded in the HTML document, etc.

CSS comments start with /* and end with */

CSS Comment Syntax

Copy code

The code is as follows:

/* Comment content*/
Example
/* ----------Beginning of text style---------- */
/* 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

Use two double slashes to comment a line

[code]
//document.write("www.jb51.net");
Use slash star to comment code blocks (multi-line)

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

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

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

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