HTMLOptionElement

在本文章中

Properties
Methods
Specifications
Browser compatibility
See also

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The HTMLOptionElement interface represents <option> elements and inherits all classes and methods of the HTMLElement interface.

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Properties

Inherits properties from its parent, HTMLElement.

Name	Type	Description
`defaultSelected`	`Boolean`	Contains the initial value of the `selected` HTML attribute, indicating whether the option is selected by default or not.
`disabled`	`Boolean`	Reflects the value of the `disabled` HTML attribute, which indicates that the option is unavailable to be selected. An option can also be disabled if it is a child of an `<optgroup>` element that is disabled.
`form`Read only	`HTMLFormElement`	If the option is a descendent of a `<select>` element, then this property has the same value as the `form` property of the corresponding `HTMLSelectElement` object; otherwise, it is `null`.
`index`Read only	`long`	The position of the option within the list of options it belongs to, in tree-order. If the option is not part of a list of options, like when it is part of the `<datalist>` element, the value is `0`.
`label`	`DOMString`	Reflects the value of the `label` HTML attribute, which provides a label for the option. If this attribute isn't specifically set, reading it returns the element's text content.
`selected`	`Boolean`	Indicates whether the option is currently selected.
`text`	`DOMString`	Contains the text content of the element.
`value`	`DOMString`	Reflects the value of the `value` HTML attribute, if it exists; otherwise reflects value of the `Node.textContent` property.

Methods

Inherits methods from its parent, HTMLElement.

HTMLOptionElement.Option(): Is a constructor creating an HTMLOptionElement object. It has four values: the text to display, text, the value associated, value, the value of defaultSelected, and the value of selected. The last three values are optional.

Specifications

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'HTMLOptionElement' in that specification.	Living Standard	No change from HTML5.
HTML5 The definition of 'HTMLOptionElement' in that specification.	Recommendation	A constructor, `Option()`, has been added. The `form` property can be the `null` value.
Document Object Model (DOM) Level 2 HTML Specification The definition of 'HTMLOptionElement' in that specification.	Recommendation	The `selected` property changed its meaning: it now indicates if the option is currently selected and no longer if it was initally selected. The `defaultSelected` property is no longer read-only.
Document Object Model (DOM) Level 1 Specification The definition of 'HTMLOptionElement' in that specification.	Recommendation	Initial definition

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	(Yes)	(Yes)	1.0 (1.7 or earlier)^[1]	(Yes)	(Yes)	(Yes)

Feature	Android	Edge	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	(Yes)	(Yes)	1.0 (1.0)^[1]	(Yes)	(Yes)	(Yes)

[1] Prior to Gecko 7.0 (Firefox 7.0 / Thunderbird 7.0 / SeaMonkey 2.4), the label property incorrectly returned an empty string if not defined instead of returning the element's text content.

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