They do, albeit it's a bit confusing https://stylexjs.com/docs/learn/thinking-in-stylex/ https://stylexjs.com/docs/learn/thinking-in-stylex/ > There is no run

They do, albeit it's a bit confusing https://stylexjs.com/docs/learn/thinking-in-stylex/ https://stylexjs.com/docs/learn/thinking-in-stylex/ > There is no runtime overhead here Specifically > No runtime style injection. There's still a runtime though > Optimized runtime for merging class names.