@angular/core

OnInit

interface

stable

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.

API

  interface OnInit { ngOnInit(): void;}

ngOnInit

void

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.

@returnsvoid

Usage Notes

The following snippet shows how a component can implement this interface to define its own initialization method.

@Component({ selector: 'my-cmp', template: `...`, standalone: false, }) class MyComponent implements OnInit { ngOnInit() { // ... } }