Validate two Fields Equality In AngularJS

angular.module('app').directive('validateConfirmField', validateConfirmField);

function validateConfirmField($parse)
{
    return {
        require: 'ngModel',
        link: function (scope, elem, attrs, ctrl)
        {
            scope.$watch(function ()
            {
                if (!(ctrl.$modelValue) || !($parse(attrs.validateConfirmField)(scope)))
                {
                    return true;
                }
                return ($parse(attrs.validateConfirmField)(scope)).toLowerCase() === ctrl.$modelValue.toLowerCase();
            }, function (currentValue)
            {
                ctrl.$setValidity('validateConfirmField', currentValue);
            });
        }
    };
}
<!-- HTML View part where you want to validate your fields -->
< input type = "text"
name = "name1"
value = "Field1"
ng - model = "field1" > < input type = "text"
name = "name2"
value = "Field2"
ng - model = "field2"
data - validate - confirm - field = "field1" >
    <!-- HTML Validation -->
    < span ng - show = "form.name2.$error.validateConfirmField" > Field1 and Field2 does not match. < /span>