In my current project, I am developing a shared grid component using Angular2 that requires an id property.
export class GridComponent {
@Input() public id: string;
}
I'm looking for a way to make the id property mandatory. Can you help me with this?
If you want to ensure a specific attribute is required, there isn't a direct method available but you can achieve it by implementing the following code:
export class GridComponent {
@Input() public id: string;
ngOnInit() {
if(!this.id) {
throw 'The "id" attribute must be provided!';
}
}
}
It's important to set up validation within the component.html file.
Check out this helpful resource on Angular Form Guidelines: Angular Form Guide
<input type="text" class="form-control" required
[(ngModel)]="model.name"
ngControl="name" >
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