Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

HTML <img> longdesc 属性

❮ HTML <img> 标签

示例

一些关于如何使用 longdesc 属性的示例

<!-- 描述与图像在同一页面上 -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="#w3htmlExplained">

<!-- 描述在外部页面中 -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="w3html.txt">

<!-- 描述是外部页面中的多个描述之一 -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="http://example.com/desc#item3">

<!-- 描述包含在 data:URI 中 -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="data:text/html;charset=utf-8;,%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3Ctitle%3EDescription%20of%20the%20Logo%3C/title%3E%3C/head%3E%3Cbody%3E%3Cp%3ESome%20description%20goes%20here%3C/body%3E%3C/html%3E">
亲自试一试 »

定义和用法

longdesc 属性指定指向图像详细描述的超链接。


浏览器支持

属性
longdesc 不支持 不支持 不支持 不支持 不支持

语法

<img longdesc="string">

属性值

描述
string

指向图像详细描述的超链接。

可能的值

  • 另一个元素的 ID
  • 绝对 URL - 指向另一个网站(如 longdesc="http://www.example.com/description.txt")
  • 相对 URL - 指向网站内的文件(如 longdesc="description.txt")

❮ HTML <img> 标签
×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.