HTMLSelectElement

The HTMLSelectElement interface represents a <select> HTML Element. These elements also share all of the properties and methods of other HTML elements via the HTMLElement interface.

 Properties

This interface inherits the properties of HTMLElement, and of Element and Node.

HTMLSelectElement.autofocus

Is a Boolean that reflects the autofocus HTML attribute, which indicates whether the control should have input focus when the page loads, unless the user overrides it, for example by typing in a different control. Only one form-associated element in a document can have this attribute specified.

HTMLSelectElement.disabled

Is a Boolean that reflects the disabled HTML attribute, which indicates whether the control is disabled. If it is disabled, it does not accept clicks.

HTMLSelectElement.form Read only

Returns a HTMLFormElement representing the form that this element is associated with. If the element is not associated with of a <form> element, then it returns null.

HTMLSelectElement.labels Read only

Returns a NodeList containing the list of label elements associated with this select element.

HTMLSelectElement.length

Is a unsigned long representing the number of <option> elements in this select element.

HTMLSelectElement.multiple

Is a Boolean that reflects the multiple HTML attribute, which indicates whether multiple items can be selected.

HTMLSelectElement.name

Is a DOMString that reflects the name HTML attribute, containing the name of this control used by servers and DOM search functions.

HTMLSelectElement.options Read only

Returns a HTMLOptionsCollection containing the set of <option> elements contained by this element.

HTMLSelectElement.required

Is a Boolean that reflects the required HTML attribute, which indicates whether the user is required to select a value before submitting the form.

HTMLSelectElement.selectedIndex

Is a long that reflects the index of the first selected <option> element. The value -1 indicates no element is selected.

HTMLSelectElement.selectedOptions Read only

Returns a live HTMLCollection containing the set of options that are selected.

HTMLSelectElement.size

Is a long that reflects the size HTML attribute, which contains the number of visible items in the control. The default is 1, unless multiple is true, in which case it is 4.

HTMLSelectElement.type Read only

Returns a DOMString the form control's type. When multiple is true, it returns "select-multiple"; otherwise, it returns "select-one".

HTMLSelectElement.validationMessage Read only

Returns a DOMString containing a localized message that describes the validation constraints that the control does not satisfy (if any). This attribute is the empty string if the control is not a candidate for constraint validation (willValidate is false), or it satisfies its constraints.

HTMLSelectElement.validity Read only

Returns a ValidityState representing the validity state that this control is in.

HTMLSelectElement.value

Is a DOMString representing the value of the form control (the first selected option).

HTMLSelectElement.willValidateRead only

Is a Boolean that indicates whether the button is a candidate for constraint validation. It is false if any conditions bar it from constraint validation.

Methods

This interface inherits the methods of HTMLElement, and of Element and Node.

HTMLSelectElement.add()

Adds an element to the collection of option elements for this select element.

HTMLSelectElement.blur()

Removes input focus from this element. This method is now implemented on HTMLElement.

HTMLSelectElement.checkValidity()

Checks whether the element has any constraints and whether it satisfies them. If the element fails its constraints, the browser fires a cancelable invalid event at the element (and returns false).

HTMLSelectElement.focus()

Gives input focus to this element. This method is now implemented on HTMLElement.

HTMLSelectElement.item()

Gets an item from the options collection for this <select> element. You can also access an item by specifying the index in array-style brackets or parentheses, without calling this method explicitly.

HTMLSelectElement.namedItem()

Gets the item in the options collection with the specified name. The name string can match either the id or the name attribute of an option node. You can also access an item by specifying the name in array-style brackets or parentheses, without calling this method explicitly.

HTMLSelectElement.remove()

Removes the element at the specified index from the options collection for this select element.

HTMLSelectElement.setCustomValidity()

Sets the custom validity message for the selection element to the specified message. Use the empty string to indicate that the element does not have a custom validity error.

Example

Get information about the selected option

/* assuming we have the following HTML
<select id='s'>
    <option>First</option>
    <option selected>Second</option>
    <option>Third</option>
</select>
*/

var select = document.getElementById('s');

// return the index of the selected option
console.log(select.selectedIndex); // 1

// return the value of the selected option
console.log(select.options[select.selectedIndex].value) // Second

A better way to track changes to the user's selection is to watch for the change event to occur on the <select>. This will tell you when the value changes, and you can then update anything you need to. See the example provided in the documentation for the change event for details.

Specifications

Browser compatibility

[1] See bug 556743.

[2] Historically, Firefox has allowed keyboard and mouse events to bubble up from the <option> element to the parent <select> element. This doesn't happen in Chrome, however, although this behavior is inconsistent across many browsers. For better Web compatibility (and for technical reasons), when Firefox is in multi-process mode and the <select> element is displayed as a drop-down list. The behavior is unchanged if the <select> is presented inline and it has either the multiple attribute defined or a size attribute set to more than 1. Rather than watching <option> elements for events, you should watch for {event("change")}} events on <select>. See bug 1090602 for details.

[3] namedItem does not appear to take the name attribute into account (only the id attribute) on Internet Explorer and Edge. There is a bug report to Microsoft about this.

See also

• The <select> HTML element, which implements this interface.