What Is Cross-Origin Resource Sharing (CORS)?

Thanks to the rapid growth of JavaScript frameworks like Angular, React, and Vue, Cross-Origin Resource Sharing (CORS) has become a popular word in the developer’s vocabulary — and for good reason. It’s common practice for modern web applications to load resources from multiple domains. But accessing these website resources from different origins requires a thorough understanding of CORS.

In this post, we’ll take a look at what CORS is and why proper implementation is an important component of building secure websites and applications.

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