this is the server.js file
var express = require('express');
var app = express();
var mongoose = require('mongoose');
var bodyParser = require('body-parser');
app.use(bodyParser.json());
mongoose.connect("mongodb://localhost/test");
var todoschema = new mongoose.schema ({
 name : {type: String, required: true}
 });
var todomodel = mongoose.model('todolist',todoschema);
app.get('/',function(req,res){
   res.sendFile('C:\\Users\\Rohit\\Desktop\\New folder\\todo.htm');
});
app.get('/todolist', function (req, res){
    todomodel.find(function(err,tasks){
      res.json(tasks);
     });
});
app.post('/todolist', function (req, res) {
  
  todomodel.insert(req.body, function(err, task) {
    res.json(task);
  });
});
app.delete('/todolist/:id', function (req, res) {
  
 todomodel.remove(req.params.id, function (err, task) {
    res.json(task);
  });
});
app.get('/todolist/:id', function (req, res) {
  
  todomodel.findById({req.params.id, function (err, task) {
    res.json(task);
  });
});
app.put('/todolist/:id', function (req, res) {
  
  todomodel.findAndModify({
     query: req.params.id,
     update: {$set: {name: req.body.name}},
     new: true}, function (err, task) {
      
      res.json(task);
    }
  );
});
app.listen(3000);
console.log("Server running on port 3000");This is the todo.html file
<!DOCTYPE html>
<html ng-app="App">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.12/angular.min.js"></script>
<script src="C:\Users\Rohit\Desktop\New folder\frontend.js">
</script>
<style>
#list   
{ margin-left:320px;
  font-size: 40px;
  font-family:verdana;
}
button     
{ color:yellow;background-color:red;text-align:center;cursor:pointer;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
  font-size:40px;
  padding: 14px 32px;
}
button:hover
{ background-color:Peachpuff;
  color:tomato;
}
</style>
</head>
<body style="background-color:cyan;">
<div ng-controller="Ctrl">
<h1 style="text-align:center;font-family:verdana;">To-Do LiSt</h1>
<div style="margin-left:300px">
<input type="text" ng-model="task.name" style="background-color:black;color:white;font-size:40px;width:40%">
<button ng-click="addtask()">Add</button> <button ng-click="updatetask()">Update</button><button ng-click="clearfield()">Clear</button> 
</div>
<ul>
<li id="list" ng-repeat="task in todolist">
{{task.name}}
<button ng-click="deletetask(task._id)">Delete</button> <button ng-click="edittask(task._id)">Edit</button>
</tr>
</table>
</div>
</body>
</html>This is the frontend.js file
var App = angular.module('App',[]);
App.controller('Ctrl',['$scope','$http',function($scope,$http) {
         
    var reset = function(){
      $http.get('/todolist').success(function(response){
        $scope.todolist=response;
        $scope.task="";
        });
     };
  reset();
$scope.addtask = function() {
  $http.post('/todolist', $scope.task).success(function(response) {
       reset();
    });
 };
$scope.deletetask = function() {
  $http.delete('/todolist/'+ id).success(function(response){
      reset();
      });
   };
 
$scope.edittask = function(id) {
   $http.get('/todolist/'+ id).success(function(response){
       $scope.task=response;
     });
   };
$scope.updatetask = function(id){
   $http.put('/todolist/'+$scope.task._id, $scope.task).success(function(response){
       reset();
    });
 };
$scope.clearfield = function(){
   $scope.task="";
}
}]);This is the error , it shows in the browser console
Not allowed to load local resource: file:///C:/Users/Rohit/Desktop/New%20folder/server.js
angular.min.js:35Uncaught Error: [$injector:modulerr] http://errors.angularjs.org/1.3.12/$injector/modulerr?p0=App&p1=Error%3A%20…gleapis.com%2Fajax%2Flibs%2Fangularjs%2F1.3.12%2Fangular.min.js%3A17%3A381)
http://localhost:3000/favicon.ico Failed to load resource: the server responded with a status of 404 (Not Found)
Failed to parse SourceMap: https://ajax.googleapis.com/ajax/libs/angularjs/1.3.12/angular.min.js.map 
    