This looks really good - the speed of rendering of the default sheet was surprising and pleasant. Is there a reason you switched from the earlier version in Ty

This looks really good - the speed of rendering of the default sheet was surprising and pleasant. Is there a reason you switched from the earlier version in TypeScript[1] to this version in JavaScript? [1] https://github.com/myliang/xspreadsheet https://github.com/myliang/xspreadsheet