Express JS Practice Exercises: Essential Techniques for Mastering the Framework

Here is a short practice on Express.js:

1. Create a new Express.js project using the steps outlined in the previous tutorial.
2. Add a new route to the application that returns a message in JSON format.

javascriptCopy codeapp.get('/json', (req, res) => {
  res.json({ message: 'Hello, Express!' });
});

3. Add a new route to the application that accepts a name parameter and returns a personalized message.

javascriptCopy codeapp.get('/greet/:name', (req, res) => {
  res.send(`Hello, ${req.params.name}!`);
});

4. Add a new route to the application that returns a HTML page. You will need to install and configure a template engine such as EJS, Jade, or Handlebars for this step.

javascriptCopy codeapp.get('/template', (req, res) => {
  res.render('index', { message: 'Hello, Express!' });
});

5. Start the Express application and visit each of the new routes in your browser to see the results.
6. Try adding additional routes to the application and experiment with the different features of Express.js, such as middleware functions and query parameters.

This practice will give you hands-on experience building web applications with Express.js. With its fast, minimalist design and powerful features, Express is a great choice for building web applications and APIs with Node.js.