[ryanianian]

The speed of the rendering is amazing compared especially to e.g. google sheets. I just informally timed both and gsheets was rendered and editable in 4 seconds whereas this took 0.2 seconds.

However nearly every native UI interaction seems kinda broken. Even entering a value on Firefox doesn't work well. The first letter typed is entered into the cell but then every subsequent letter triggers firefox's fine-in-page (which also doesn't work as others have pointed out). Similarly copy/paste doesn't work, and the context menu (right-click) closes immediately. Maybe it works better in Chrome.

I wonder if there's a case to be made for a hybrid rendering/ui approach here. Rendering could be handled by canvas but native elements swapped in when actual text-editing is invoked?

Cool little demo in any case. I liked some of the simple but effective spreadsheet evaluation code.