NgElement

class

Implements the functionality needed for a custom element.

      
      abstract class NgElement extends HTMLElement {
  protected ngElementStrategy: NgElementStrategy
  protected ngElementEventsSubscription: Subscription | null
  abstract attributeChangedCallback(attrName: string, oldValue: string, newValue: string, namespace?: string): void
  abstract connectedCallback(): void
  abstract disconnectedCallback(): void
}

Properties

Property	Description
`protected ngElementStrategy: NgElementStrategy`	The strategy that controls how a component is transformed in a custom element.
`protected ngElementEventsSubscription: Subscription \| null`	A subscription to change, connect, and disconnect events in the custom element.

Methods

attributeChangedCallback()

Prototype for a handler that responds to a change in an observed attribute.

      
      abstract attributeChangedCallback(attrName: string, oldValue: string, newValue: string, namespace?: string): void

Parameters

`attrName`	`string`	The name of the attribute that has changed.
`oldValue`	`string`	The previous value of the attribute.
`newValue`	`string`	The new value of the attribute.
`namespace`	`string`	The namespace in which the attribute is defined. Optional. Default is `undefined`.

Returns

void: Nothing.

connectedCallback()
Prototype for a handler that responds to the insertion of the custom element in the DOM.
abstract connectedCallback(): void `abstract connectedCallback(): void` Parameters There are no parameters. Returns `void`: Nothing.

disconnectedCallback()
Prototype for a handler that responds to the deletion of the custom element from the DOM.
abstract disconnectedCallback(): void `abstract disconnectedCallback(): void` Parameters There are no parameters. Returns `void`: Nothing.