<form name="login" ng-submit="login()">
    <div class="login" ng-app="loginPage" ng-controller="loginController">
        <input type="text" placeholder="username" ng-model="uname" name="userid"><br>
        <input type="password" placeholder="password" ng-model="pword" name="pswrd"><br>
        <!--<input type="button" ng-click="login();" onclick="check(this.form)" value="Login"/>-->
        <button ng-click="login();">Login</button>
    </div>
</form>

<script language="javascript">
    var app = angular.module('loginPage', []);
    app.controller('loginController', function($scope, $http, $window) {
        console.log("inside controller");
        $scope.login = function() {
            console.log("inside the login function");
            console.log($scope.uname);

            var login_http = $http({
                method: 'POST',
                url: '/login',
                params: { username: $scope.uname, password: $scope.pword }
            }).then(
                    function (response) {
                        $window.alert('successfull!!');
                        //alert('successfull ...');
                    }, function (response) {
                        $window.alert('wrong username/password');
                        //alert('wrong username/password ... ');
                    }
            )
        }

connection.connect();

/* GET home page. */
router.get('/', function(req, res, next) {
  res.sendFile(path.join(__dirname, '../', 'views', 'login.html'));
});
router.post('/login', function(req,res)
{

  console.log("Username:"+req.query.username);
  console.log("Password:"+req.query.password);

  var user = req.query.username;
  var pass = req.query.password

  connection.query("select * from user where login_name = ?", user, function(err, rows, fields) {
    if (!err){
        if(user==rows[0].login_name && pass==rows[0].pass){
             console.log("success");
             res.sendStatus(200);
            //res.sendFile(path.join(__dirname, '../', 'views', 'team_list.html'));
        }
    }
    else{
        console.log('Error while performing Query.', err);
        res.sendStatus(401);
    }

Server listening on port 8000
GET / 200 10.853 ms - 5260
Username:test
Password:test
success
POST /login?password=test&username=test 200 12.559 ms - 2
GET /?userid=test&pswrd=test 200 10.027 ms - 5260

Server listening on port 8000
GET / 304 16.586 ms - -
Username:test
Password:test
success
POST /login?password=test&username=test 200 12.778 ms - 2
GET /?userid=test&pswrd=test 304 9.742 ms - -

<div class="login" ng-app="loginPage" ng-controller="loginController">
     <!--name="login" ng-submit="login()"-->

        <input type="text" placeholder="username" ng-model="uname" name="userid"><br>
        <input type="password" placeholder="password" ng-model="pword" name="pswrd"><br>
        <input type="submit" ng-click="login()" value="login"/>
        <!--button ng-click="login();">Login</button-->
</div>

Server listening on port 8000
GET / 304 9.312 ms - -
Username:test
Password:test
C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmysqllibprotocolParser.js:
78
        throw err; // Rethrow non-MySQL errors
        ^

TypeError: Cannot read property 'login_name' of undefined
    at Query._callback (C:UsersdagarwWebstormProjectsGP-01_DEVroutesindex.js:30
:25)
    at Query.Sequence.end (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmy
sqllibprotocolsequencesSequence.js:85:24)
    at Query._handleFinalResultPacket (C:UsersdagarwWebstormProjectsGP-01_DEVnod
e_modulesmysqllibprotocolsequencesQuery.js:144:8)
    at Query.EofPacket (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmysql
libprotocolsequencesQuery.js:128:8)
    at Protocol._parsePacket (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modules
mysqllibprotocolProtocol.js:280:23)
    at Parser.write (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmysqlli
bprotocolParser.js:74:12)
    at Protocol.write (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmysql
libprotocolProtocol.js:39:16)
    at Socket.<anonymous> (C:UsersdagarwWebstormProjectsGP-01_DEVnode_modulesmy
sqllibConnection.js:109:28)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)