Steps to create Node JS application and install required modules
Step 1: Make a separate folder called server via following command.
mkdir server
Step 2: Initialize Node Application in it via given command.
npm init -y
Step 3: Install Express JS via given command.
npm i express
Step 4: Create a file for code via given command.
touch server.js
Example: Implementation of above approach in the server.js file
Javascript
// Server.jsconst express = require('express');const app = express();const PORT = 3000;app.use(express.json());app.get("/", (req, res) => { console.log("GET Request Successfull!"); res.send("Get Req Successfully initiated");})app.get("/user", (req, res) => { res.send(`Client is requesting for USER Data`)})app.get("*", (req, res) => { res.send("Error 404 Invalid Endpoint");})app.listen(PORT, () => { console.log(`Server established at ${PORT}`);}) |
To run the application type the following command in terminal.
node ./server.js
Output: Verify the result using Postman API testing
Understanding the Function of a Wildcard Route in Express.js
In this article, we are going to learn about the Wildcard Route and its functions. Wildcard routes are the default case route. If a client requests a route that does not exist on the server, that particular route will be routed to the wildcard route; it is also known as the Error 404 route.