Angular 2 - Is ngOnDestroy called when updating or just when moving from a component?

Question

I'm trying to find out if ngOnDestroy starts in Angular 2 when updating or just when someone moves away from the page?

Answer 1

When updating or when moving away from the current page, ngOnDestroy will not be called. The application will simply be destroyed by the browser.

Only when Angular2 removes a component from the DOM because you are leaving or you are calling destroy() on a dynamically created component is ngOnDestroy() called.

You can listen to beforeunload and unload yourself if you need some action before the application is destroyed by the browser.

see also

• https://developer.mozilla.org/en-US/docs/Web/Events/unload
• How can we detect when the user closes the browser? (Angular)