Angular 2 custom validator with parameters

Question

How do I create let\'s say my own maxLength validator in Angular 2? All examples I could find use validators similar to \'required\' one meaning that they already know the r

Answer 1

The minValueValidator example basically shows that you can use a factory for your custom validator so it will be something like this:

static minValue = (num: Number) => {
    return (control:Control) => {
         var num = control.value;
         if (isNaN(num) || num < 5 ) { return {"minValue": true}; }
         return null;
    }
}

In my case I use FormControl not Control

import { FormControl } from '@angular/forms';