Answers for "phone number validation"

javascript phone number input

function phonenumber(inputtxt)
{
  var phoneno = /^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/;
  if((inputtxt.value.match(phoneno))
        {
      return true;
        }
      else
        {
        alert("message");
        return false;
        }
}

phone number validation

<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" />