What is the use of html lang attribute?-Front-end Q&A-php.cn

What is the use of html lang attribute?

青灯夜游

Release： 2021-11-18 09:49:18

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In HTML, lang is a global attribute that can specify the language of element content. The syntax is ""; it is generally used in the "" tag. Declares the language type of the current page.

What is the use of html lang attribute?

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

html The lang attribute specifies the language of the element's content.

In HTML5, the lang attribute can be used on any HTML element (ie, global attribute).

Syntax: <element lang="language_code"></element>

language_code specifies the language code of the element content. Language Code Reference Manual. Language Code Reference Manual

The lang attribute is generally used in the "" tag to declare the language type of the current page.

Explanation of the lang attribute of the html element in HTML

When I first started learning HTML, there was something about the basic HTML format. If you don’t understand, the basic format is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body></body>
</html>

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What is the lang attribute in the html tag for? Why specify its value as "en" or "zh-CN"? My personal opinions are as follows:

1. The attribute lang is the abbreviation of English language, which means language, "en" represents English, and "zh-CN" represents Chinese

2. In my case After my own attempts, I found that if you don’t write the lang attribute, there will be no problem with the display of the entire HTML document

3. We all know that if you are in China, the default language of the local browser is Chinese. When we open a foreign website, the browser will prompt "Whether to translate the content of the web page into Chinese", as shown below
What is the use of html lang attribute?
Check the source code of the web page and find lang="en"

4. Log in to several Chinese local websites and find that there is no lang attribute written in the source code, and there is no translation prompt

5. First of all, the search engine cannot determine the content of the page it crawls. Language, because in its view they are all binary files, then we need to tell it what language the content on this page is, so that it can know what to do next. In other words, when you set lang to " en", no matter what language the content on your web page is in, it will appear to be English. If the default language of the local browser is not English, the above option will be prompted and ask you if you need translation. This can be clearly seen in the browser settings:

What is the use of html lang attribute?

# Summary:

1. The search engine cannot determine what language the content on the page is. People need to tell it (this also reflects the characteristics of semantics, that is, the machine itself does not understand anything, we need to tell it what it is, and when we tell it what it is, we must also follow this rule, to If we do not set lang to "en", but we use Chinese language content in the web page, this will interfere with the machine to a large extent and interfere with the user's normal experience. This is meaningless.)

2. The browser will compare the read page language with the local language. If they are consistent, no processing will be performed. Otherwise, it will prompt whether translation is required (of course, the premise is that the user has checked this function, which is checked by Chrome by default)

Recommended tutorial: "html video tutorial"

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