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This article focuses on "what functions can be achieved by HTML, CSS and JavaScript". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what functions HTML, CSS and JavaScript can achieve.

1. HTML is the carrier of web content.

Content is the information that web page makers put on the page for users to browse, which can include text, pictures, videos, and so on.

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Second, the CSS style is the expression

Just like the coat of a web page, such as: title font, color change, adding background pictures to the title, borders, etc.

All these things that are used to change the appearance of content are called representations.

Third, JavaScript is used to achieve special effects on web pages.

For example: mouse over the pop-up drop-down menu, mouse over the table background color change, focus news rotation.

It can be understood as: animated and interactive are generally realized by JavaScript.

Code comments for HTML:

Code comments are used to help programmers mark the code. After a period of time, if you look at the code you have written, you can quickly remember the role of this code.

Code comments not only facilitate programmers to recall the use of previous code, but also help other programmers quickly understand the functions of your program, and facilitate many people to cooperate in the development of web code.

Semantic of HTML:

Semantics is actually to understand the purpose of each tag, it can make your web page better understood by search engines.

Its benefits can be summed up in two points:

(1) it is easier to be included by search engines.

(2) it is easier for screen readers to read web pages.

The difference between em, strong and span of HTML:

(1) and tags are used to emphasize the keywords in a paragraph, and their semantics are to emphasize

(2) the label has no semantics, and its function is to set a separate style.

Summary,caption of HTML:

The function is to add a title and summary to the table

The content of the summary will not be displayed in the browser, its function is to increase the readability (semantics) of the table, so that the search engine can better understand the contents of the table, but also make the screen reader better help special users to read the contents of the table.

Code comments:

Comment statements in CSS: used to indicate

Used in Html to indicate

Problems with the HTML selector:

The difference between descendant selector and subselector

A child selector refers only to its immediate descendants, or you can understand it as the first generation of descendants that act on child elements. The descendant selector acts on all descendant elements. The descendant selector selects through spaces, while the child selector selects through ">".

At this point, I believe you have a deeper understanding of "what can be achieved by HTML, CSS and JavaScript". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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