angular2 change detection with CD class

Question

How angular2 perform change detection default strategy ? I have gone through some post related with the change detection and got some details like 'angular2 creates change detector for every component'.

Now for instance If I've 4 components (comp1, comp2 comp3 & comp4) and I change comp4 property so change detection would be perform through all components or single component ?

Can you please provide some code tutorial link related above info ?

Answer 1

Here is the detailed article that will help you understand change detection:

• Angular’s $digest is reborn in the newer version of Angular
• Everything you need to know about change detection in Angular

Also see this answer.

Now for instance If I've 4 components (comp1, comp2 comp3 & comp4) and I change comp4 property so change detection would be perform through all components or single component ?

If you change the comp4 property as a result of some async opertation like setTimeout, the change detection will run from root level component and down to children. So you will have change detection for all components.

If some of the components set ChangeDetectionStrategy.OnPush, they will be skipped if the input bindings haven't changed.