cannot find OnInit in typescript during implementation

Question

I am working on a sample project with a loginComponent, I need to implement OnInit in my class when i try to add the OnInit i am getting the following error

[ts] cannot find OnInit

Here is my code

export class loginComponent implements OnInit{

 ngOnInit():all{

    }
}

How to solve this issue

Thanks in advance

Answer 1

import { OnInit } from '@angular/core';