‘Access-Control-Allow-Origin’ issue when API call made from React (Isomorphic app)

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CORS is a browser feature. Servers need to opt into CORS to allow browsers to bypass same-origin policy. Your server would not have that same restriction and be able to make requests to any server with a public API. https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS

Create an endpoint on your server with CORS enabled that can act as a proxy for your web app.

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