Handling CORS Related Issues In An Express Framework Node.js Web Application

Proper cross-origin resource sharing (CORS) configuration is one of those things that is completely necessary when building a RESTful API, but also one of those things that is a total pain in the butt when it comes to prototyping an application. CORS related errors are common when testing a web application where the front-end JavaScript layer exists on a different port or host than the API that it tries to access.

Previously I had written about configuring cross-origin resource sharing via a…

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