Password mismatch validation in angularjs

Angular using to apply password mismatch validation in the form. We need a password match validation, When i interred my password field value say for example admin(*****) and conform password field will inter match the same value from the field. The value are match means set flag for a variable is True or mismatched the value means it will set Fasle. 

Based this flag value to show the message form to apply directive of ng-show. This logic apply email validation also.

AngularJS:

var app = angular.module('frmVal',[]);
app.controller('FrmCtrl', function($scope){
    $scope.pwd = "";
    $scope.cpwd = "";
 
    $scope.isMatch = true;
 
    $scope.$watch('pwd', function(newValue, oldValue){
        if(newValue == $scope.cpwd)
        {
            $scope.isMatch = false;
        } else {
            $scope.isMatch = true;
        }
    });
    $scope.$watch('cpwd', function(newValue, oldValue){
        if(newValue == $scope.pwd)
        {
            $scope.isMatch = false;
        } else {
            $scope.isMatch = true;
        }
    });
});

HTML:
<div ng-app="frmVal">
    <div ng-controller="FrmCtrl">
       Password <input type="text" ng-model="pwd" /> <br/>
        Conform Password <input type="text" ng-model="cpwd" /><br/>
        <div class="error" ng-show="isMatch"> Do not Match</div>
    </div>
</div>

Result:
Demo