Recipes

Merged header, line items, currency formatting, and automatic totals.

The fastest way to populate many rows from an array of objects.

A cumulative-sum column using a self-referencing formula pattern.

A todo list built from checkbox cells with a live progress counter.

Dropdown cell + conditional formatting to color rows by status.

Wire up <input type="file"> to load an xlsx into the grid.

Export the current worksheet as a downloadable xlsx file.

Mirror cell value changes into a React state tree in real time.