OnInit
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
}
Class implementations
AbstractFormGroupDirective
NgModelGroup
FormGroupName
NgModelGroup
RadioControlValueAccessor
FormArrayName
FormGroupName
RouterOutlet
UpgradeComponent
See also
AfterContentInit
- Lifecycle hooks guide
Methods
ngOnInit() |
---|
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. |
ngOnInit(): voidParametersThere are no parameters. Returns
|
Usage notes
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() {
// ...
}
}
© 2010–2020 Google, Inc.
Licensed under the Creative Commons Attribution License 4.0.
https://v10.angular.io/api/core/OnInit