How to quickly set up an Express development system?

To quickly set up an Express development system, you can follow these steps:

1. Make sure you have Node.js and npm installed. You can check the versions by typing node -v and npm -v in the command line.
2. Create a new project folder and open it.
3. Use the following command in the command line to initialize a new npm project and follow the prompts for configuration:

npm init

1. Install the Express framework and its related dependencies.

npm install express

1. Create a main file (such as app.js or index.js) and import the Express module in the file.

const express = require('express');
const app = express();

1. Define routes and handlers in the main file. For example, create a simple route to handle requests to the root path.

app.get('/', (req, res) => {
  res.send('Hello World!');
});

1. Start the Express server and listen on the specified port. For example, listen on port 3000.

app.listen(3000, () => {
  console.log('Server running on port 3000');
});

1. To start the Express server, enter the following command in the command line:

node app.js

Now that you have successfully set up a basic Express development system, you can add more routes and handlers as needed, as well as utilize various middleware and plugins to enhance functionality.