Express app.delete() Function

The `app.delete()` function is utilized to handle HTTP DELETE requests for a specified path. It takes the path as a parameter and also accepts callback functions as parameters to handle the request.

Syntax: 

app.delete(path, callback)

Parameters: 

• path: It is the path for which the middleware function is being called.
• callback: It is a middleware function or a series/array of middleware functions. 

app.delete() function is basically used to handle DELETE requests in Express.js.

Steps to Install the express module:

Step 1: You can install this package by using this command.

npm install express

Step 2: After installing the express module, you can check your express version in the command prompt using the command.

npm version express

Step 3: After that, you can just create a folder and add a file, for example, index.js. To run this file you need to run the following command.

node index.js

Project Structure:

The updated dependencies in package.json file will look like:

"dependencies": {
    "express": "^4.18.2",
}

Example: Below is the example of the app.delete() Function:

const express = require('express');
const app = express();
const PORT = 3000;

app.delete('/',
    (req, res) => {
        res.send("DELETE Request Called")
    })

app.listen(PORT,
    function (err) {
        if (err) console.log(err);
        console.log("Server listening on PORT", PORT);
    });

Steps to run the program: 

node index.js

Console Output:

Server listening on PORT 3000

Browser Output: Now make a DELETE request to http://localhost:3000/ and you will get the following output: 

DELETE Request Called 

We have a complete list of all the important Express Application Module methods, to check those please go through Express Application Complete Reference article