Angular Component Lifecycle Hooks

Angular's lifecycle hooks are callbacks for a component's key life events: creation, updates, and destruction. They give you predictable moments to run code, like fetching data or updating state. Use ngOnInit for one-time setup after all inputs are initialized, and ngOnChanges to react when those inputs change. The common footgun is putting setup logic that depends on input properties in the constructor. Inputs are not available there; use ngOnInit for this work to avoid errors.