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Cross-Origin Resource Sharing (CORS) is an important concept in web development that allows servers to specify which domains can access their resources. By default, web browsers block requests from one domain to another for security reasons (called the same-origin policy). CORS allows you to overcome this limitation by letting your Node.js server accept requests from different domains.
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In this guide, we’ll explore what CORS is, why it’s important, and how you can easily enable and configure it in your Node.js applications.
What is CORS?
Cross-Origin Resource Sharing (CORS) is a mechanism that allows your server to indicate any other domains (or origins) from which a browser is permitted to load resources. These resources could be APIs, stylesheets, scripts, or any other data the server provides.
For example, if you have a front-end application running on http://localhost:3000 and your API is hosted on http://api.myapp.com, without CORS enabled, the browser will block any requests made from the front-end to the API due to the same-origin policy.
Why CORS Matters
CORS is essential when you’re building applications with front-end and back-end systems running on different domains or ports…
