JSFiddle - React, Tailwind, and code Playground

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>

CSS

.error {
    color: red;
}

JavaScript

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;
        }
    });
});