Difference Between req.query and req.params in Express Last Updated : 15 Mar, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report In Express, req.query and req.params are used to access different types of parameters in a request. 'req.query' retrieves query string parameters from the URL (e.g., '/search?name=GFG' → 'req.query.name' is '"GFG"'), while 'req.params' retrieves route parameters defined in the URL path (e.g., '/users/:id' → '/users/123' → 'req.params.id' is '"123"').req.query: Dealing with URL Stuff:Where the Data Comes From: It's from the extra bits attached to the end of a URL, like when you fill out a form or put something in the search bar.When to Use It: Great for handling info from URLs, especially when things like search terms are involved. JavaScript app.get('/search', (req, res) => { const searchTerm = req.query.q; // Do something with the search term }); req.params: Figuring Out Route Things:Where the Data Comes From: It grabs values from the changing parts in the URL, those bits with colons that can be different each time.When to Use It: Handy when you want your web page to work with different values in the same kind of URL setup. JavaScript app.get('/user/:id', (req, res) => { const userId = req.params.id; // Fetch info based on the user ID }); Difference between req.query and req.params in Express:Understanding the difference between req.query and req.params is key to managing route parameters in Express.js. Aspectreq.queryreq.paramsSource of DataExtra bits at the end of a URL (e.g., form inputs, search bar)Changing parts in the URL marked by colonsExample URL'/search?q=example''/users/:id'UsageIdeal for handling URL parameters, especially with search termsUseful when dealing with dynamic values within a consistent URL structureExpress.js Example'javascript app.get('/search', (req, res) => { const searchTerm = req.query.q; // Process search term });'javascript app.get('/users/:id', (req, res) => { const userId = req.params.id; // Fetch user details based on dynamic user ID });Scenario ExampleHandling a search feature on a websiteAccessing user-specific information on a pageSteps to Setup Backend with Node.js and Express:Step 1: Creating express app:npm init -yStep 2: Installing the required packagesnpm install expressExample: Create a file named server.js and add the following code: JavaScript const express = require('express'); const app = express(); const PORT = 3000; // Route using req.query app.get('/search', (req, res) => { const searchTerm = req.query.q || 'No search term provided'; res.send(`Search Term: ${searchTerm}`); }); // Route using req.params app.get('/users/:id', (req, res) => { const userId = req.params.id || 'No user ID provided'; res.send(`User ID: ${userId}`); }); // Start the server app.listen(PORT, () => { console.log(`Server is running at http://localhost:${PORT}`); }); Steps to run the App:node server.jsOuput for req.params:Response when we send paramsOuput for req.query:Response when we send query paramsConclusion:To keep it simple, req.query deals with data from the end of a URL, while req.params grabs values from dynamic parts of the URL. Whether you're dealing with a search form or creating web pages with changing parts, knowing when to use each makes Express.js a lot less confusing. Comment More infoAdvertise with us Next Article Difference Between Express and Fastify Web App Frameworks C chatgpt4du65 Follow Improve Article Tags : Web Technologies Node.js Geeks Premier League Express.js Geeks Premier League 2023 +1 More Similar Reads Difference between res.send() and res.json() in Express.js? In this article, we will learn about res.send() & res.json(), along with discussing the significant distinction that differentiates between res.send() & res.json(). Let us first understand what is res.send() and res.json() in Express.js? res.send() - The res.send() function is used for sendi 4 min read Difference between app.use() and app.get() in Express.js Express.js, a popular web application framework for Node.js, provides a powerful set of methods for routing HTTP requests. 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