UI Source

In Angular, every component has a life-cycle, a number of different stages it goes through. Creates the component Renders the component Creates and renders the component children Checks when the component data-bound properties change, and  Destroys the component before removing it from the DOM ngOnChanges this method is called  once  on component’s creation and then  every time changes  are detected in one of the component’s  input  properties. export class MyComponent implements OnChanges { ngOnChanges(changes: SimpleChanges) { // Insert Logic Here! } }   ngOnInit Invoked when given component has been initialized. This hook is only called  once  after the first  ngOnChanges export class MyComponent implements OnInit { ngOnInit() { // Insert Logic Here! } }     ngDoCheck Invoked when the change detector of the given component is invoked. It allows us to implement our own change detection algorithm for the given component. export class MyComponent implements D