How to use AngularJS with Node.js and Express?
13/03/2024
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5
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In order to use AngularJS with Node.js and Express.js, you first need to set up a server using Node.js and Express.js and then implement AngularJS for client-side scripting. These steps will guide you through the process:
Step 1: Setup Node.js and Express.js
Step 1.1: Install Node.js and npm
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Download and install Node.js. The Node.js package includes npm(node package manager).
Step 1.2: Install Express.js
Use the following command to install Express.js globally:
npm install -g express
Step 1.3: Create a new directory, navigate into it and create a new Express.js application:
mkdir myApp && cd myApp
express
This will create a new Express.js app with a package.json file and a basic folder structure.
Step 2: Install necessary packages
Step 2.1: Install the necessary packages by running:
npm install
Step 2.2: To run your server use:
node app.js
Step 2.3: If you navigate to http://localhost:3000 you should see your new Express.js application.
Step 3: Install AngularJS
Step 3.1: You install AngularJS into your project via Node Package Manager(npm):
npm install angular
Step 4: Implement AngularJS
Step 4.1: Create a file named 'index.html' in the 'public' directory.
Step 4.2: Refer to AngularJS in your index.html file:
<!doctype html>
<html ng-app>
<head>
<title>My AngularJS App</title>
<script src="/node_modules/angular/angular.js"></script>
</head>
<body>
...
</body>
</html>
Here, the ng-app directive tells AngularJS that this is the root element of the AngularJS application.
Step 5: Implementing a basic AngularJS app
Step 5.1: Define a AngularJS module and a controller inside a script tag in index.html:
<!doctype html>
<html ng-app="myApp">
<head>
<title>My AngularJS App</title>
<script src="/node_modules/angular/angular.js"></script>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.message = "Hello World";
});
</script>
</head>
<body ng-controller="myCtrl">
{{message}}
</body>
</html>
In this code, a module named 'myApp' is defined and attached to the root element using the ng-app directive. Inside the module, a controller named 'myCtrl' is defined and attached to the body element using the ng-controller directive. $scope is a built-in AngularJS object that contains application data and methods. The expression {{message}} is used to bind the value of $scope.message to the body of the HTML.
Now, If you navigate to http://localhost:3000 you should see your basic AngularJS application running on an Express.js server.
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