Html comments Introduction to symbols that mark text comments in Html

In this article, let’s learn about the symbols used to mark text comments in Html comments.

HTML comments, we often have to make some HTML comments next to some codes. This has many benefits, such as: easy to find, It is convenient for comparison, and it is convenient for other programmers in the project team to understand your code, and it can also facilitate your understanding and modification of your own code in the future.

Start using HTML comments

HTML comment syntax

Example

The code is as follows:

<!--这里是注释-->
<a href="http://www.php.cn">PHP中文网</a>
<!--链接结束-->

The following is a more complete

1,
2, //Comment content (Insert a single line comment in css or javascript )
3, /*Comment content*/ (Insert multi-line comments in css or javascript)

##JavaScript comment

JavaScript comment syntax

The code is as follows:

//注释内容 
/* 
注释内容 
*/

CSS comment

Just like described in the HTML tutorial Just like , comments also play a very important role in CSS documents, which can help us remember the meaning of CSS, the location of loading in HTML documents, etc.
CSS comments start with /* and end with * /

CSS comment syntax

The code is as follows:

/* 注释内容 */ 
示例 
/* ----------文字样式开始---------- */ 
/* 白色12象素文字 */ 
.dreamduwhite12px 
{ 
color:white; 
font-size:12px; 
} 
/* 黑色16象素文字 */ 
.dreamdublack16px 
{ 
color:black; 
font-size:16px; 
} 
/* ----------文字样式结束---------- */

JavaScript comment example

Use two Double slash comment lines
[code]
//document.write("www.jb51.net");
Use slash stars to comment code blocks (multiple lines)

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

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

Tips: 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.

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