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[Angular] Angular 17 series (XVII) detects changes in @Input values

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Posted on 5/29/2024 4:13:30 PM | | | |
@Input(), @Output() in Angular and allows Angular to share data between the parent context and child directives or components.

How does the component detect changes in the input value? The previous solution reference is as follows:

Angular 9 series (VIII) updates the value of a child component by triggering an event via set
https://www.itsvse.com/thread-9267-1-1.html
In fact, changes in input values can be detected through the ngOnChanges method, which is called when any of the data-bound properties of the OnChanges directive changes, and defines ngOnChanges() to handle the change.

Documentation:The hyperlink login is visible.

Create a new HelloComponent with the following code:

Page code:

The parent AppComponent code is as follows:

The page code is as follows:

The renderings are as follows:



(End)




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