???? Angular OnPush Change Detection

2022年10月7日 — Change detection is the process of checking to see if something in your Angular application has changed, and then rendering the changes to the DOM.

2024年1月17日 — Angular can detect when component data changes, and then automatically re-render the view to reflect that change.

Change detection is the process through which Angular checks to see whether your application state has changed, and if any DOM needs to be updated.

So, default change detection scans every object in the component tree and if the value isn't the same as last time it scanned it flags it as a change.

Mastering Angular change detection, explaining fundamental concepts - running, debugging and optimising change detection.

import Component,Input, ChangeDetectionStrategy, Output, EventEmitter, AfterViewChecked} from angular2/core;. import TodoItem} from ./todo_item;.

2020年8月9日 — 我們可以用在元件裝飾器的metadata 中增加 changeDetection 屬性，並設定為 ChangeDetectionStrategy.OnPush 。 這個變更偵測策略可以對這個元件和子元件 ...