Learn Angular.JS from the Best Tutors
Affordable fees 1-1 or Group class Flexible Timings Verified Tutors Search in
Asked by Vaibhav Last Modified
Answer Express.js is a web application framework for Node.js, designed to make it easier to build web applications and APIs. Here's a basic guide on how to use Express.js with Node.js:
Make sure you have Node.js and npm (Node Package Manager) installed on your machine. You can download them from the official website: Node.js Downloads.
Create a new directory for your project and navigate to it in the terminal. Run the following command to initialize a new Node.js project:
npm init -y This will create a package.json file with default values.
Install Express.js as a dependency for your project using the following command:
npm install express Create a new file (e.g., app.js) and set up a basic Express application:
const express = require('express'); const app = express(); const port = 3000; app.get('/', (req, res) => { res.send('Hello, Express!'); }); app.listen(port, () => { console.log(`Server listening at http://localhost:${port}`); }); In the terminal, run the following command to start your Express application:
node app.js Visit http://localhost:3000 in your web browser, and you should see the message "Hello, Express!"
Expand your application by adding more routes and handling different HTTP methods. For example:
// Define a route with parameters app.get('/users/:userId', (req, res) => { const userId = req.params.userId; res.send(`User ID: ${userId}`); }); // Handle POST requests app.post('/users', (req, res) => { res.send('User created!'); }); Express allows you to use middleware functions to perform additional tasks during the request-response cycle. For example, adding a middleware to log requests:
app.use((req, res, next) => { console.log(`Received a ${req.method} request to ${req.url}`); next(); }); These are the basic steps to get started with Express.js in a Node.js project. You can explore more features and advanced concepts in the Express.js documentation.
Related Questions
Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com
Ask a QuestionRelated Lessons
Recommended Articles
Learn Hadoop and Big Data
Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...
Read full article >
8 Hottest IT Careers of 2014!
Whether it was the Internet Era of 90s or the Big Data Era of today, Information Technology (IT) has given birth to several lucrative career options for many. Though there will not be a “significant" increase in demand for IT professionals in 2014 as compared to 2013, a “steady” demand for IT professionals is rest assured...
Read full article >
Make a Career in Mobile Application Programming
Almost all of us, inside the pocket, bag or on the table have a mobile phone, out of which 90% of us have a smartphone. The technology is advancing rapidly. When it comes to mobile phones, people today want much more than just making phone calls and playing games on the go. People now want instant access to all their business...
Read full article >
Learn Microsoft Excel
Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...
Read full article >
Looking for Angular.JS Training?
Learn from the Best Tutors on UrbanPro
Are you a Tutor or Training Institute?
Join UrbanPro Today to find students near youThe best tutors for Angular.JS Classes are on UrbanPro
The best Tutors for Angular.JS Classes are on UrbanPro
17
