Keyword Analysis & Research: change detection on push angular


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Frequently Asked Questions

What is change detection in angular?

Change detection in angular is done from the root to the bottom. This means that if a parent component has OnPush, the child component will also behave as OnPush, regardless of its setting. Imagine all the components are OnPush.

What happens if I don't use @output in angular?

If you were to update your code, and not use the @Output (), the change detection will still work, because an event was binded to the template: Change detection in angular is done from the root to the bottom. This means that if a parent component has OnPush, the child component will also behave as OnPush, regardless of its setting.

How to use onpush change detection strategy?

OnPush change detection strategy will only 'detect changes' when a new object reference is injected into the component. So in order for ChildComponent (which has OnPush change detection strategy) to trigger change detection, you have to inject a new object reference to the "element" input property instead of the same.

How does a model change in angular?

A model in Angular can change as a result of any of the following scenarios: All Angular apps are made up of a hierarchical tree of components. At runtime, Angular creates a separate change detector class for every component in the tree, which then eventually forms a hierarchy of change detectors similar to the hierarchy tree of components.


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