How to implement simple list example(react+tailwindcss) without flushSync and document.querySelector?

[codenoobforreal]

Hello everyone!
I'm new to pdnd.I wrote the code line by line of the simple list example and examined it carefully to learn more about the library.
I got it running successfully with TailwindCSS v4 and React.
I'm curious about what @alexandereardon said about using context instead of flushSync and document.querySelector to achieve the same triggerPostMoveFlash effect.But I can't make it work.

If anyone has a good example, please share!