refreshChildComponents(lView, components); } } 这个过程中refreshView函数会被调用二次,第一次进入的是关键代码2分支,然后依次调用如下函数重新进入refreshView函数: refreshChildComponents() -> refreshChildComponents() -> refreshComponent() -> refreshView() 第二次进入refreshView函数调用的便是关键代码1分支...
第一,constructor 阶段 DOM 都还没有 render 和 refresh 完,此时去拿 element size 根本不准。 第二,即便你是在 AfterViewInit 阶段去拿也不合适,因为这个阶段并不是整个 page 的 DOM 都好了,而且也没有考虑到 SSR 的情况。 所以,正确的做法是 export class AppComponent { constructor() { const hostEleme...
at executeInitAndCheckHooks (core.mjs:2471:1) at refreshView (core.mjs:9566:1) at refreshComponent (core.mjs:10692:1) at refreshChildComponents (core.mjs:9291:1) at refreshView (core.mjs:9545:1) at refreshComponent (core.mjs:10692:1) at refreshChildComponents (core.mjs:9291:1) 我不...
export class ChildComponent { @Input() data: string[]; constructor(private cd: ChangeDetectorRef) {} refresh() {this.cd.detectChanges(); } } 在每次手动刷新的时候,他会更改检测 ChangeDetectorRef.markForCheck() 如果数据是可观察的 app.component.ts import { Component } from '@angular/core'; ...
parent[FLAGS] |= LViewFlags.HasChildViewsToRefresh; // 父级节点标记为需要刷新子视图 parent = 获取LView父级(parent); } } 最后想问的是什么时候 Angular 会将当前的LView消费节点设置为ActiveConsumer?这一切都发生在你可能已经了解的[refreshView](https://github.com/angular/angular/blob/4c7d5d8acd8a...
export class AppComponent { // 掌控子元素, 绑定变量 content 到 ion-content 组件 @ViewChild('content') content: IonContent; showGoTop = false; //是否要显示 回到顶部 按钮 // 绑定到 ion-conent 的滚动监听事件, 当滚动时自动触发 onScroll(event) { ...
at detectChangesInComponent (node_modules/@angular/core/fesm2022/core.mjs:12967:5) at detectChangesInChildComponents (node_modules/@angular/core/fesm2022/core.mjs:13028:9) at refreshView (node_modules/@angular/core/fesm2022/core.mjs:12841:13) ...
logs = []; } // schedules a view refresh to ensure display catches up tick() { this.tick_then(() => { }); } tick_then(fn: () => any) { setTimeout(fn, 0); } } import { Component } from '@angular/core'; import { LoggerService } from './logger.service'; @Component({...
at refreshChildComponents (core.js:7675) at refreshDescendantViews (core.js:7600) at ComponentFactory.push../node_modules/@angular/core/ivy_ngcc/fesm5/core.js.ComponentFactory.create (core.js:21567) at ViewContainerRef_.createComponent (core.js:10477) ERROR Error: Uncaught (in promise): Error...
In Chrome, we put the break points at WeatherComponent. One is at line 43, getLastAccessedCity of ngOnInit. The other is line 231, updateLastAccessedCity of Search. In Visual Studio, put the break points at CitiesController.cs. One is at Get, the other is at Post. In Country fi...