I spent 10 seconds on it. looks pretty cool. But, some questions before I'd try to use it instead of jquery datatables or handsontable: - why did you build it and what alternatives did you try first? What unmet need does it fulfill? how does it compare to other libs like handsontable or jquery datatables? - how extensible is it? e.g. if I want to add custom context menus, custom locked / editable cells, etc - how is the license enforced-- i.e. does it require internet connectivity to work?

Couple further comments: - I tried copy + paste in your 1mm cells demo, and it didn't behave as expected (copied "n;m", pasted "n") - 1mm cells isn't very much if you are touting performance. 100k rows with 500 columns each = 50,000,000 cells; that would be a better example if you are trying to show that your lib handles large tables well. And if you are trying to suggest that this could be compared to Excel, then 1mm rows with 1000 columns would be better (Excel supports 1,048,576 rows by 16,384 columns)

anyway, looks like a nice start-- good luck!