1 import { FormControl } from '@angular/forms';
3 export function validateUrl(c: FormControl) {
4 let URL_REGEXP = new RegExp('^https?://(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)$');
6 return URL_REGEXP.test(c.value) ? null : {