Area alt attribute

HTML DOM Area

Definition and usage

Alt Attribute sets or returns the area Alt attribute The value.

If the image cannot be displayed, the alt attribute specifies the alternative text for the area.

Example

Example 1

Get the alternative text for a specific area in the image map:

var x = document.getElementById("venus").alt;

Try it yourself

Example 2

Change the alternative text for a specific area in the image map:

document.getElementById("venus").alt = "The planet Venus";

Try it yourself

Syntax

Return alt attribute:

areaObject.alt

Set alt attribute:

areaObject.alt = text

属性值

值 描述
text 该区域的替代文本。

技术细节

返回值： 字符串值，表示该区域的替代文本。

浏览器支持

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
支持 支持 支持 支持 支持

相关页面

HTML 参考手册：HTML <area> alt 属性

HTML DOM Area