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File: n459.com/file/25127180-478845139

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If your HTML is full of divs, be careful
. Students who do front-end development know that the basic components of a web page are HTML, JavaScript, and CSS. Developers usually pay more attention to JavaScript and CSS, and practice various language specifications and design patterns. There is obviously less attention to HTML. As long as you can make a designer-drawn interface, everything will be fine, and you don't care about whether HTML is standardized and reasonable. So the following situations can be seen everywhere:

The button is clickable

Not an element
of the title is used

Instead of the title element (

，

Etc.) The
corresponding text label is

Rather than
input box is also used to bind the keyboard events

And not
see? one move

Take the world! Is there any problem? It doesn't seem to be a big problem, after all, the page looks in line with the design and can interact normally. But have you thought about it, if

Can solve everything, why do we need the other dozens or hundreds of labels? This is about the semantics of HTML.

What is Semanticization?
Semanticization means that HTML elements have corresponding meanings. It is used to describe the content of an element or its relationship with other elements. In HTML, except

And are basically semantic elements.

The degree of meaning of label names is also different, such as

ratio

The description of the content is even more vague.

It is also semantic because it indicates that the content should belong to a group. and

Not only that its content belongs to a group, but also an article.

To further illustrate the importance of semantics, the following uses title and button elements as examples.

Title element

Is the title of the page, plus the

The hierarchical structure of the page is formed.

When your HTML is full of divs, then you have to be careful

What is semantic

Title element

In many rich text editors, you can automatically generate a content table of contents using the appropriate title structure. For example, the directory structure of this article is like this:

: When your HTML is full of divs, then you have to be careful

: What is semantic

: Title element

: Button

: Non-semantic elements

: In summary, you can see that HTML itself conveys the structural information of the entire article. On the contrary, if all are used

, It becomes like this:

: When your HTML is full of divs, then you have to be careful

: What is semantic

: Title element

: Button

: Non-semantic elements

: Summary due to

It does not have any meaning, so it is a flat structure. As long as you use the correct HTML, the DOM will become clear and structured.

Button
The function of the button is to submit a form or change the state of an element. By definition, buttons have the following characteristics:

The focus
can be obtained. It can be activated by hitting the space bar or the enter key. It
can be activated by a mouse click.
When you use

When you bind a click event to simulate a button, you can't use the semantic interaction features that come with it. You also need to implement these functions manually:

Focus state
Keyboard interaction
Mouse interaction
More than that, when the screen reader encounters the submit element, it will recognize the semantics and tell the user that this is a submit button. If only

, The reader will not think it is a button.

When we use semantic HTML elements, we give meaning to the content, and the content has life.

Non-semantic elements
mentioned earlier,

And are non-semantic elements.

Does not attach any meaning to the content, it is just a

. Of course, this is not entirely accurate, because

There is still a little difference between and:

Block-level elements are inline elements and should be placed inside other elements, such as

Inline elements

If you really can’t find the corresponding HTML element to represent the content, you can use

or. Now that it is designed

And, naturally they have their abilities. After all, not every HTML element requires additional semantics.

The general principle is to give priority to using corresponding semantic elements to express content. Second, use labels with less clear meaning. Finally consider using

with.

Summary
Although using semantic HTML elements will not bring significant benefits to your project, I still recommend you to do so. At the very least, semantic HTML pages can lead to better SEO rankings, more friendly to screen readers, and greater code readability. If you are a pursuit Coder, I believe you will agree with me.