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在一個(gè)web表單中, HTML元素 <optgroup> 會(huì)創(chuàng)建包含在一個(gè) <select> 元素中的一組選項(xiàng)

內(nèi)容類別

沒有。

允許的內(nèi)容

零個(gè)或多個(gè)<option>元素。

標(biāo)記遺漏

開始標(biāo)記是強(qiáng)制性的。如果此元素之后緊跟著另一個(gè)<optgroup>元素，或者父元素沒有更多內(nèi)容，則結(jié)束標(biāo)記是可選的。

允許父級(jí)

一個(gè)<select>元素。

允許ARIA角色

沒有

DOM界面

HTMLOptGroupElement

注意： Optgroup元素可能不是嵌套的。

屬性

這個(gè)元素包含全局屬性。

disabled如果設(shè)置了這個(gè)布爾值，那么這個(gè)選項(xiàng)組中將沒有選項(xiàng)是可以被選擇的。通常瀏覽器會(huì)置灰這樣的控件，它不會(huì)再接受任何瀏覽器事件，例如鼠標(biāo)點(diǎn)擊或者焦點(diǎn)相關(guān)的事件。

label選項(xiàng)組的名字，當(dāng)在用戶界面標(biāo)記(label)選項(xiàng)的時(shí)候可以被瀏覽器使用。使用這個(gè)元素時(shí)必須加上這個(gè)屬性

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>

結(jié)果

規(guī)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


瀏覽器兼容性

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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