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Node.js / Express.js - AJAX POST request

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Created by:
Joanne-Senior
740

In this article, we would like to show you how to make AJAX POST requests in Express.js

1. Express.js POST methods example

In this section, we use Express.js to handle POST requests.

Note: it is required to add external library to run below example, so use:

npm install express

index.js

const express = require('express');

const port = 3000;
const app = express();

app.post('/examples', (request, response) => {
  const data = request.body; 
  // create/update a resource

  response.send('put your changed data here');
});

app.listen(port, () => {
    console.log(`server is listening at http://localhost:${port}`);
});

To run the server use: 

node index.js

Output:

server is listening at http://localhost:3000

2. Pure JavaScript (Vanilla JS) AJAX POST request

The following is an example execution of a fetch method that sends POST requests.

<!DOCTYPE html>
<html>
  <body>
    <script>

      var bodyData = 'text';

      fetch('/examples', {
        method: 'POST',
        headers: {
          'Content-Type': 'text/plain',
        },
        body: bodyData,
      })
        .then((response) => response.json())
        .then((data) => {
          console.log('Success:', data);
        })
        .catch((error) => {
          console.error('Error:', error);
        });
    </script>
  </body>
</html>
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Node.js / Express.js - AJAX requests

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