https://codesandbox.io/s/github/5k-mirrors/poe-what-to-flip

An editor where you can see the app (on the right) and edit the code (on the left):

https://codesandbox.io/s/github/5k-mirrors/poe-what-to-flip

• Wait a bit to let the data load.
• Extend config.js with any custom comparison.
• Modify config.js to use your own proxy. If too many users use the default proxy it won't be able to fetch the data anymore. No technical knowhow required to setup your own, free proxy: https://github.com/Rob--W/cors-anywhere