interface
A lifecycle hook that is called when a directive, pipe, or service is destroyed. Use for any custom cleanup that needs to occur when the instance is destroyed.
interface OnDestroy { ngOnDestroy(): void }
ngOnDestroy() |
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A callback method that performs custom clean-up, invoked immediately before a directive, pipe, or service instance is destroyed. |
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The following snippet shows how a component can implement this interface to define its own custom clean-up method.
@Component({selector: 'my-cmp', template: `...`}) class MyComponent implements OnDestroy { ngOnDestroy() { // ... } }
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https://v11.angular.io/api/core/OnDestroy