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