Date and Currency validation in Angular (4)

Question

I am new to Angular. I am using angular 4 reactive forms and figured out how to perform custom validations. Following is my implementation for numeric

functi         


        

Answer 1

This is my solution:

import {AbstractControl} from "@angular/forms";

export class MyValidators {

  // validate MM/DD/YYYY
  static date(c: AbstractControl): { [key: string]: boolean } {
    let value = c.value;
    if (value && typeof value === "string") {
      let match = value.match(/^([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{4})$/);
      if (!match) {
        return {'dateInvalid': true};
      }
      let date = new Date(`${match[3]}-${match[1]}-${match[2]}`);
      if (isNaN(date.getTime())) {
        return {'dateInvalid': true};
      }
    }
    return null;
  }

}