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watak

在一个web表单中, HTML元素 <optgroup> 会创建包含在一个 <select> 元素中的一组选项

内容类别

没有。

允许的内容

零个或多个<option>元素。

标记遗漏

开始标记是强制性的。如果此元素之后紧跟着另一个<optgroup>元素,或者父元素没有更多内容,则结束标记是可选的。

允许父级

一个<select>元素。

允许ARIA角色

没有

DOM界面

HTMLOptGroupElement

注意: Optgroup元素可能不是嵌套的。

属性

这个元素包含全局属性。

disabled如果设置了这个布尔值,那么这个选项组中将没有选项是可以被选择的。通常浏览器会置灰这样的控件,它不会再接受任何浏览器事件,例如鼠标点击或者焦点相关的事件。

label选项组的名字,当在用户界面标记(label)选项的时候可以被浏览器使用。使用这个元素时必须加上这个属性

例子

<select>  
    <optgroup label="Group 1">    
        <option>Option 1.1</option>  
    </optgroup> 
    <optgroup label="Group 2">    
        <option>Option 2.1</option>    
        <option>Option 2.2</option>  
    </optgroup>  
    <optgroup label="Group 3" disabled>    
        <option>Option 3.1</option>    
        <option>Option 3.2</option>    
        <option>Option 3.3</option>  
    </optgroup>
</select>

结果

规范

Specification

Status

Comment

HTML Living StandardThe definition of '<optgroup>' in that specification.

Living Standard


HTML5The definition of '<optgroup>' in that specification.

Recommendation


HTML 4.01 SpecificationThe definition of '<optgroup>' in that specification.

Recommendation


浏览器兼容性

Feature

Chrome

Edge

Firefox

Internet Explorer

Opera

Safari

Basic Support

(Yes)

(Yes)

(Yes)

No

(Yes)

(Yes)

disabled

(Yes)

(Yes)

(Yes)

No

(Yes)

(Yes)

label

(Yes)

(Yes)

(Yes)

No

(Yes)

(Yes)

Feature

Android

Chrome for Android

Edge mobile

Firefox for Android

IE mobile

Opera Android

iOS Safari

Basic Support

(Yes)

(Yes)

(Yes)

(Yes)

No

?

(Yes)

disabled

(Yes)

(Yes)

(Yes)

(Yes)

No

?

(Yes)

label

(Yes)

(Yes)

(Yes)

(Yes)

No

?

(Yes)

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