Basic Usage
To use the cors module, you need to import it and apply it to your Express application. Here’s a simple example of how to enable CORS for all requests in an Express-based application:
// index.js
const express = require('express');
const cors = require('cors');
const app = express();
// Enable CORS for all routes
app.use(cors());
app.get('/', (req, res) => {
res.send('CORS is enabled for all origins!');
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});
NPM CORS
Cross-Origin Resource Sharing (CORS) is a fundamental security mechanism implemented by web browsers to prevent unauthorized access to resources on a web page from different origins. In Node.js, CORS management is essential when building APIs that need to be consumed by clients running on different domains.
Table of Content
- What is CORS?
- Need for CORS in Node.js
- Using npm Cors Package
- Basic Usage
- Features
- Configuring CORS
- Conclusion