Express.js | app.put() Function

The app.put() function routes the HTTP PUT requests to the specified path with the specified callback functions.

Syntax:

app.put(path, callback [, callback ...])

Arguments:

  1. Path: The path for which the middleware function is invoked and can be any of:
    • A string representing a path.
    • A path pattern.
    • A regular expression pattern to match paths.
    • An array of combinations of any of the above.
  2. Callback: Callback functions can be:
    • A middleware function.
    • A series of middleware functions (separated by commas).
    • An array of middleware functions.
    • A combination of all of the above.

Installation of express module:

  1. You can visit the link to Install express module. You can install this package by using this command.
    npm install express
  2. After installing express module, you can check your express version in command prompt using the command.
    npm version express
  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

Filename: index.js



filter_none

edit
close

play_arrow

link
brightness_4
code

var express = require('express');
var app = express();
var PORT = 3000;
  
app.put('/', (req, res) => {
  res.send("PUT Request Called")
})
  
app.listen(PORT, function(err){
    if (err) console.log(err);
    console.log("Server listening on PORT", PORT);
}); 

chevron_right


Steps to run the program:

  1. The project structure will look like this:
  2. Make sure you have installed express module using following command:
    npm install express
  3. Run index.js file using below command:
    node index.js

    Output:

    Server listening on PORT 3000
    
  4. Now make PUT request to http://localhost:3000/ and you will get the following output:

    PUT Request Called

So this is how you can use the express app.put() function which routes HTTP PUT requests to the specified path with the specified callback functions.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.