Express app.post() Function
Last Updated :
14 Jan, 2024
In this article, we will learn about `app.post()` routing HTTP POST requests to the defined path, executing specified callback functions.
Syntax:
app.post(path, callback [, callback ...])
Arguments:
- Path: The path for which the middleware function is invoked and can be any of:
- A string represents a path.
- A path pattern.
- A regular expression pattern to match paths.
- An array of combinations of any of the above.
- 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.
Steps to create the application:
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
Project Structure:
The updated dependencies in package.json file will look like:
"dependencies": {
"express": "^4.18.2",
}
Example 1: Below is the code example of app.post() Function:
Javascript
const express = require( 'express' );
const app = express();
const PORT = 3000;
app.post( '/' ,
(req, res) => {
res.send( "POST 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 POST request to http://localhost:3000/ and you will get the following output:
POST Request Called
So this is how you can use the express app.post() function which routes HTTP POST requests to the specified path with the specified callback functions.
We have a complete list of Express App methods, to check those please go through this Express.js Application Complete Reference article.
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