I've a component with the following input
@Input() id: string
I would like this input to be mandatory, which means that if I call my component without specifying it, it would throw a js error.
I can do it in the ngOnInit, but I imagine there is a keyword for this ?
You can throw error in ngOnInit method after checking input property:
ngOnInit() {
if (!id) {
throw new Error('No ID provided!');
}
}
@Input() id: string;
ngOnInit(){
// 'id' will be 'undefined' so provide a default data when component loads individually, so possible solution below
if(!id){
this.id = '.......';
/*---------Other Implementation-------------*/
}
}