Express.js is a fast, minimalist web framework for Node.js. It is an easy way to build web applications, APIs and RESTful services. In this blog post, we will go through the steps to get a simple Express.js app up and running.
TL;DR
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1. Install Node.js
The first step is to install Node.js. You can download the installer from the official website https://nodejs.org/en/ and follow the instructions to install it on your computer. Once Node.js is installed, you can verify the installation by running the following command in your terminal:
node -v
3. Initialize a new Node.js project
To create a new Node.js project, run the following command:
npm init -y
5. Create the main server file
Create a new file called index.js in your project directory and add the following code:
const express = require('express');
const app = express();
const port = 3000;
app.get('/', (req, res) => {
res.send('Hello World!');
});
app.listen(port, () => {
console.log(`Server running at http://localhost:${port}`);
});
Your Express.js app should now be running on http://localhost:3000.
Conclusion
You have successfully created a basic Express.js application! This is just the beginning - Express.js offers many more features for building robust web applications and APIs.
Next Steps
- Learn about middleware
- Explore routing in Express.js
- Add a database connection
- Implement authentication
Happy coding!