How to useRoute parameter in Express
In route parameters, instead of sending as queries, embed the value inside the actual URL itself.
For example
http://example.com/api/:id/:name
Here, userid and username are placeholder for route parameter. To use the above URL parameter send the request like below.
http://example.com/api/101/ragul
- :userid is mapped to 101
- :username is mapped to ragul
Example: Using route params
- To use the route parameter, define the parameters in the URL of the request.
- Every parameter should be preceded by a colon “:”
- Access the route parameters from the request object’s params property, it will return a Javascript Object.
Javascript
// server.js// create an express objectconst app = require("express")();// server portconst PORT = 8080;// Using paramsapp.get("/api/:id/:name", (req, res) => { // get the URL parameter from URL // with req.params const params = req.params; res.send(params);});// listen for connectionsapp.listen(PORT, () => { console.log(`server is listening at port:${PORT}`);}); |
The above code will map the id to the immediate value next to “/api/” and for the name it will add the second next value in the URL parameter.
Output:
using URL parameters with req.params
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
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