interface
A lifecycle hook that is called after Angular has initialized all data-bound properties of a directive. Define an ngOnInit() method to handle any additional initialization tasks.
interface OnInit {
ngOnInit(): void
} | ngOnInit() |
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| A callback method that is invoked immediately after the default change detector has checked the directive's data-bound properties for the first time, and before any of the view or content children have been checked. It is invoked only once when the directive is instantiated. |
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The following snippet shows how a component can implement this interface to define its own initialization method.
@Component({selector: 'my-cmp', template: `...`})
class MyComponent implements OnInit {
ngOnInit() {
// ...
}
}
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https://v12.angular.io/api/core/OnInit