It’s every developer’s frustration once in a while to see that big red Access to fetched has been blo... Tagged with tutorial, webdev, security.

Materialize

Bobby Iliev

Backend Development

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Community Picks

The web enforces something called the same-origin policy. By default, we can only access resources that are located at the same origin as the origin of our request. In this case, the origin www.evilwebsite.com tried to access cross-origin resources from www.bank.com. The browser can now allow certain cross- Origin responses which would’ve normally been blocked by thesame-Origin policy.

CS Visualized: CORS

<p>Woow, such an amazing article with wonderful animations. I liked it so much, thanks!</p>


<p>Fantastic resource, I know a few engineers who often get confused and frustrated by CORS, the clear animations and descriptions should help them. Great work.</p>
