How to usequeries in Express

In this method, the URL parameter will be send in the URL as queries. Queries are appended at the end of actual url with a question character “?” appended at the last. Every query value will be mapped as key – value pairs and will be delimited with an ampersand “&” symbol.

http://example.com/api/?id=101&name=ragul

In the above example the queries are passed like below key – value pairs

Key	Value
id	101
name	ragul

Example: Using queries:

To use URL parameters in type of queries, use the “req.query” property from request object in Express.
Express will automatically add the queries from URL in the req.query as a Javascript Object.

Javascript

// server.js
 
// create an express object
const app = require("express")();
 
// server port
const PORT = 8080;
 
// using queries
app.get("/api", (req, res) => {
    // get the URL parameters passed by
    // query with req.query
    const queries = req.query;
    res.send(queries);
});
 
// listen for connections
app.listen(PORT, () => {
    console.log(`server is listening at port:${PORT}`);
});

queries are being read from req.query and just simply returned as response.

Output:

using URL parameters with req.query

How to handle URL parameters in Express ?

In this article, we will discuss how to handle URL parameters in Express. URL parameters are a way to send any data embedded within the URL sent to the server. In general, it is done in two different ways.

Table of Content

Using queries
Using Route parameter

Tags:

#Geeks Premier League 2023 #Express.js #Geeks Premier League #Node.js #Web Technologies

Steps to Create Express Application:

Approach 2: Using Route parameter

How to usequeries in Express

Javascript

How to handle URL parameters in Express ?

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