In this article, we will learn how to create a simple web server using Node.js and Express. Express is a popular web application framework for Node.js, designed for building web applications and APIs.
Before we get started, make sure you have the following installed on your system:
Step 1: Create a new project
Create a new directory for your project and navigate to it in your terminal.
Initialize a new npm project by running:
This will create a
package.json file in your project directory.
Step 2: Install Express
Install Express using npm:
This will add Express as a dependency in your
Step 3: Create the server
Create a new file named
server.js in your project directory and add the following code:
Here's a breakdown of the code above:
- We import the Express module using
- We create an instance of the Express app by calling
- We define a port for our server to listen on.
- We create a route for the root path ("/") that sends a "Hello World!" response.
- We start the server using
app.listen()and log a message to the console.
Step 4: Start the server
To start the server, run the following command in your terminal:
You should see the following output:
Open your web browser and navigate to http://localhost:3000 to see your server in action. You should see the "Hello World!" message displayed on the page.
Congratulations! You have successfully created a simple web server using Node.js and Express. You can now build upon this foundation to create more complex web applications and APIs.
What is Node.js and Express?
How do I install Node.js and Express?
First, you need to install Node.js on your system. Visit the official Node.js website (https://nodejs.org/) and download the appropriate version for your OS. After installing Node.js, you can install Express using the following command in your terminal or command prompt:
How do I create a basic web server using Node.js and Express?
Once you have Node.js and Express installed, follow these steps to create a basic web server:
- Create a new folder for your project and navigate to it in your terminal or command prompt.
npm initto create a
package.jsonfile and follow the prompts.
- Create a new file named
app.jsin your project folder.
- Write the following code inside
- Save the file and run
node app.jsin your terminal or command prompt.
- Open your browser and navigate to
http://localhost:3000. You should see "Hello World!" displayed on the page.
How can I serve static files (e.g., images, stylesheets, etc.) using Express?
To serve static files, you need to use the
express.static middleware. First, create a folder named
Now, your static files will be accessible through your server. For example, if you have an image named
logo.png in the
public folder, you can access it through the URL