Some time ago I released DataGridXL version 3. Version 1 and 2 both reached the Hacker News homepage, which made me really proud!
DataGridXL is a modern Excel-like data grid.
Version 3 is the best version of DataGridXL so far! More features, more performance, better product!
Have a look at the website and let me know what you think!
P.S. I have already released Spreadsheet Preview (https://spreadsheetpreview.com) which is like PDF.js but for .xlsx files.
Cheers!
Robbert