kontrola platnosti phonenumbers, které
import { isValidPhoneNumber } from 'libphonenumber-js'
//for e.g.
isValidPhoneNumber('8 (888) 888-88-88', 'RU') === false
isValidPhoneNumber('8 (800) 555-35-35', 'RU') === true
isValidPhoneNumber('+12223333333') === false
isValidPhoneNumber('+12133734253') === true
telefonní číslo ověření
<input type="text" pattern="\d*" maxlength="10" onkeydown="javascript: return event.keyCode === 9 || event.keyCode === 8 || event.keyCode === 46 ? true : !isNaN(Number(event.key))" class="form-control form-control-solid form-control-lg"
[ngModelOptions]="{standalone: true}" [disabled]="!onOff"
[(ngModel)]="communityModel.associationContactNo" />