Class ElementPart

packages/lit-html/src/lit-html.ts:2117–2158

export type {ElementPart};
class ElementPart implements Disconnectable {
  readonly type = ELEMENT_PART;

  /** @internal */
  __directive?: Directive;

  // This is to ensure that every Part has a _$committedValue
  _$committedValue: undefined;

  /** @internal */
  _$parent!: Disconnectable;

  /** @internal */
  _$disconnectableChildren?: Set<Disconnectable> = undefined;

  options: RenderOptions | undefined;

  constructor(
    public element: Element,
    parent: Disconnectable,
    options: RenderOptions | undefined
  ) {
    this._$parent = parent;
    this.options = options;
  }

  // See comment in Disconnectable interface for why this is a getter
  get _$isConnected() {
    return this._$parent._$isConnected;
  }

  _$setValue(value: unknown): void {
    debugLogEvent &&
      debugLogEvent({
        kind: 'commit to element binding',
        element: this.element,
        value,
        options: this.options,
      });
    resolveDirective(this, value);
  }
}

/**
 * END USERS SHOULD NOT RELY ON THIS OBJECT.