What are the standard usage of comments in html, css and js

This time I will bring you the annotations for html, css and js. What are the standard usages and what are the annotations for using html, css and js. What are the precautions? What are the following? This is a practical case, let’s take a look at it.

Adding necessary comments is a good habit that a responsible and ethical front-end must have, which can greatly improve the maintainability and readability of the code. First of all, everyone needs to be familiar with how to write html, css, and js comments:

html comment:

<!--注释内容-->

css comment:

//注释内容 单行注释（不推荐使用，因为有的浏览器可能不兼容，没有效果）
/*注释内容*/ 多行注释（推荐使用）

JavaScript:

//注释内容 单行注释/*注释内容*/ 多行注释

Summary:

//注释内容     （在css或javascript中插入单行注释）/*注释内容*/   （在css或javascript中插入多行注释)

The following is a summary of where comments are used in these types of codes and how to write comments. (It may vary according to personal habits)

1. HTML comment

Used position:

1) Generally used after the end of some major node tags, such as :

<div class="wrap">
<div class="main">
...
</div><!--main end-->
<div><!--wrap end-->

2) Used after the end of some loops, such as:

<ul class="list">
    <li>111111</li>
    <li>222222</li>
    <li>333333</li>
</ul><!--list loop-->

All this is In order to make the program more convenient and clear when nested. When it is convenient for others, it is also convenient for yourself. The nesting of programs is very messy, and it will be a very complicated process for you to modify it.

2. CSS comments

are generally used when defining a module style to indicate which module this style is applied to, such as:

/*通用 - 评论*/
.comment{...}
/*相册*/
.photo{...}
/*分享*/
.share{...}
/*投票*/
.vote{...}

3. JavaScript comments

Generally, comments are added above a certain function function to explain the function, author, author information, and modification time of the function.

//========================================================
//      截断字符
//      steepvi
//      rtx:*******
//      2010-10-14
//========================================================

Finally, comments are also characters and will generate traffic. Therefore, when the page is published to the official address, it is best to add a further optimization process.

The compression process is a non-reverse process, ensuring that the local file is the latest and has comments. After compression, uploads it to the server. Server-side files cannot be used for local debugging.

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!

Related reading:

How to use the img tag of HTML images

Detailed explanation of the meta column in the WEB interface of HTML5

How to use html form submission in HTML

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