Did you find a clever/elegant way of detecting tic-tac-toe winning moves? I wrote a simple implementation in Typescript several years ago; I tried some approaches with representing the cells as a 2D array and looping over the rows/columns, but I ended up just using a flat array and hardcoding the sets of cells to check [1]. If memory serves, using a flat/1D array made other parts of the code easier, not just the game logic, though that might have been due to my inexperience; I was just starting to learn React/frontend dev at the time.
[1] https://github.com/DylanSp/tic-tac-toe-react/blob/master/src...