# CORS Cross-Origin Resource Sharing - CORS - is a mechanism for allowing restricted resources (CSS stylesheets, images, and scripts) to be accessed across domains even when they originate inside scripts. This mechanism gives web servers cross-domain access controls, which enable secure cross-domain data transfers. Modern browsers use CORS in an API container - such as XMLHttpRequest or Fetch - to mitigate risks of cross-origin HTTP requests. ## More Information [Fetch Living Standard](https://fetch.spec.whatwg.org/)