Front-end sends a JSON array; the back-end receives it via what method

Front-end sends a JSON array; the back-end receives it via the POST method using Express.js.

Answer:

When the front-end sends a JSON array, the back-end typically receives it via the POST HTTP method. The data is accessed in Express.js through req.body after parsing with middleware like express.json(). Here’s a concise example:

const express = require(‘express’);
const app = express();
app.use(express.json());

app.post(‘/api/users’, (req, res) => {
  const dataArray = req.body;
  // Process dataArray as needed
  res.send({ message: ‘Data received successfully!’ });
});

app.listen(3000, () => {
  console.log(‘Server is running on http://localhost:3000’);
});

const express = require(‘express’);

const app = express();

app.use(express.json());

app.post(‘/api/users’, (req, res) => {

const dataArray = req.body;

// Process dataArray as needed

res.send({ message: ‘Data received successfully!’ });

});

app.listen(3000, () => {

console.log(‘Server is running on http://localhost:3000’);

});

Explanation:

Front-end sends JSON array: The client (front-end) uses fetch or an HTTP library to send a POST request with the JSON body.
Back-end setup:
Include express.json() middleware in your Express app to parse incoming JSON data into req.body.
Create a POST route that handles the request and processes the received array.
Accessing Data: The sent JSON array is available as req.body inside your route handler, allowing you to work with it easily.

This setup ensures smooth communication between front-end and back-end when sending structured data like JSON arrays.

5 responses to “Front-end sends a JSON array; the back-end receives it via what method”

Well-written! Your approach to explaining the process using a practical example is spot on. This article is a must-read for anyone working with Express.js and JSON APIs.

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I appreciate the simplicity in your explanation. It would be great if you could also mention how to handle errors or validate the JSON data received.

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Thanks for sharing this. The use of `express.json()` middleware is well-explained, and the example makes it easy to follow.

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Great article! It explains the process of sending JSON data from front-end to back-end effectively. I found the step-by-step guide particularly helpful.

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That’s a clear and concise explanation! The code example really helps in understanding how to handle JSON arrays on the back-end.

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Front-end sends a JSON array; the back-end receives it via what method

5 responses to “Front-end sends a JSON array; the back-end receives it via what method”

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