really like these - curious how the xlsx editor and viewer is built in that what kind of headless spreadsheet?

could not have been easy

Hi! I'm one of the engineers at Extend that worked on this - one of our other engineers created a Rust XLSX/XLS parser that we ported to WASM to our @extend-ai/react-xlsx package which handles the rendering/charts. It exposes some hooks so users can use their own components for the toolbar