Node JS Update & Delete REST API

Node.js is a popular open-source, cross-platform JavaScript runtime used for building server-side applications. It is commonly used to create RESTful APIs and is often paired with frontend frameworks and libraries such as Flutter.

Step 1: Creating a Node.js Backend

To create a Node.js backend for your Flutter application, you will need to have Node.js installed on your machine. Once Node.js is installed, you can create a new project using npm (Node Package Manager) and set up the necessary dependencies.

“`javascript
// app.js
const express = require(‘express’);
const app = express();
const port = 3000;

app.use(express.json());

// Define your REST API endpoints here…
app.put(‘/api/resource/:id’, (req, res) => {
// Handle your PUT request for updating a resource
});

app.delete(‘/api/resource/:id’, (req, res) => {
// Handle your DELETE request for deleting a resource
});

app.listen(port, () => {
console.log(`Node.js backend is running at http://localhost:${port}`);
});
“`

Step 2: Integrating Node.js Backend with Flutter

Once your Node.js backend is set up, you can now integrate it with your Flutter application to perform update and delete operations through REST API calls. You can use the http package in Flutter to make HTTP requests to your Node.js backend.

“`dart
// main.dart
import ‘package:flutter/material.dart’;
import ‘package:http/http.dart’ as http;

void main() {
runApp(MyApp());
}

// Define your Flutter UI here…

Future updateResource(String id) async {
var url = ‘http://localhost:3000/api/resource/$id’;
var response = await http.put(Uri.parse(url), body: {‘data’: ‘updated’});
print(‘Response status: ${response.statusCode}’);
}

Future deleteResource(String id) async {
var url = ‘http://localhost:3000/api/resource/$id’;
var response = await http.delete(Uri.parse(url));
print(‘Response status: ${response.statusCode}’);
}
“`

Step 3: Testing Update & Delete Operations

With your Node.js backend and Flutter application set up, you can now test the update and delete operations by triggering the corresponding API calls from your Flutter app. Make sure that your Node.js server is running and accessible from your Flutter application.

Conclusion

Node.js and Flutter are a powerful combination for building modern web and mobile applications. By following this tutorial, you have learned how to create a Node.js backend with REST API endpoints for update and delete operations, and integrate it with a Flutter application.