Part of that seem's to be Wix's React components (https://github.com/wix/wix-ui#readme https://github.com/wix/wix-ui#readme) which means they didn't even build

Part of that seem's to be Wix's React components (https://github.com/wix/wix-ui#readme https://github.com/wix/wix-ui#readme) which means they didn't even build it themselves