Method ngOnInit

packages/upgrade/static/src/upgrade_component.ts:127–197

@docs-private

()

  /** @docs-private */
  ngOnInit() {
    // Collect contents, insert and compile template
    const attachChildNodes: ɵangular1.ILinkFn | undefined = this.helper.prepareTransclusion();
    const linkFn = this.helper.compileTemplate();

    // Instantiate controller
    const controllerType = this.directive.controller;
    const bindToController = this.directive.bindToController;
    let controllerInstance = controllerType
      ? this.helper.buildController(controllerType, this.$componentScope)
      : undefined;
    let bindingDestination: ɵupgradeHelper.IBindingDestination;

    if (!bindToController) {
      bindingDestination = this.$componentScope;
    } else if (controllerType && controllerInstance) {
      bindingDestination = controllerInstance;
    } else {
      throw new Error(
        `Upgraded directive '${this.directive.name}' specifies 'bindToController' but no controller.`,
      );
    }
    this.controllerInstance = controllerInstance;
    this.bindingDestination = bindingDestination;

    // Set up outputs
    this.bindOutputs(bindingDestination);

    // Require other controllers
    const requiredControllers = this.helper.resolveAndBindRequiredControllers(controllerInstance);

    // Hook: $onChanges
    if (this.pendingChanges) {
      this.forwardChanges(this.pendingChanges, bindingDestination);
      this.pendingChanges = null;
    }

    // Hook: $onInit
    if (this.controllerInstance && ɵutil.isFunction(this.controllerInstance.$onInit)) {
      this.controllerInstance.$onInit();
    }

    // Hook: $doCheck
    if (controllerInstance && ɵutil.isFunction(controllerInstance.$doCheck)) {
      const callDoCheck = () => controllerInstance?.$doCheck?.();

      this.unregisterDoCheckWatcher = this.$componentScope.$parent.$watch(callDoCheck);
      callDoCheck();
    }

    // Linking
    const link = this.directive.link;
    const preLink = typeof link == 'object' && link.pre;
    const postLink = typeof link == 'object' ? link.post : link;
    const attrs: ɵangular1.IAttributes = NOT_SUPPORTED;
    const transcludeFn: ɵangular1.ITranscludeFunction = NOT_SUPPORTED;
    if (preLink) {
      preLink(this.$componentScope, this.$element, attrs, requiredControllers, transcludeFn);