Protected_choicesAn object which maps option values to displayed labels.
Protected_internalsAttached ElementInternals which provides form handling functionality.
Protected_optionsPredefined
Protected_primaryThe primary input (if any). Used to determine what element should receive focus when an associated label is clicked on.
StaticformDeclare that this custom element provides form element functionality.
StaticobservedAttributes requiring change notifications
StatictagThe HTML tag name used by this element.
An AbortSignal that can be passed to event listeners registered in subclasses. The signal will ensure that the listener is removed when the element is disconnected from the DOM. Not available in the constructor.
Is this element disabled?
Is this field editable? The field can be neither disabled nor readonly.
The form this element belongs to.
The input element name.
The value of the input element.
InternalApply key attributes on the containing custom HTML element to input elements contained within it.
Initialize the custom element, constructing its HTML.
Mark a choice as selected.
The value to add to the chosen set
Mark a choice as un-selected.
The value to delete from the chosen set
Protected_activateProtectedActivate event listeners which add dynamic behavior to the custom element.
Protected_buildProtectedCreate the HTML elements that should be included in this custom element. Elements are returned as an array of ordered children.
Protected_disconnectProtectedA method provided for subclasses to perform tear-down workflows as an alternative to overriding disconnectedCallback.
Protected_initializeProtectedPreserve existing
Protected_onProtectedSpecial handling when the custom element is clicked. This should be implemented to transfer focus to an appropriate internal element.
Protected_refreshProtectedRefresh the active state of the custom element.
Protected_toggleProtectedSpecial behaviors that the subclass should implement when toggling the disabled state of the input.
The new disabled state
An abstract base class designed to standardize the behavior for a multi-select UI component. Multi-select components return an array of values as part of form submission. Different implementations may provide different experiences around how inputs are presented to the user.