ts
| Guidance | Practices |
|---|---|
| Do | Use for calendar date grids: wire onPageUp/onPageDown to month navigation and onNavigateBefore/onNavigateAfter for cross-month arrow key navigation. |
| Do | Attach both gridRef and handleKeyDown to the grid container element. |
| Don't | Use for simple linear lists; prefer useListFocus for 1D navigation. |
| Param | Type | Description |
|---|---|---|
optionsrequired | UseGridFocusOptions | Configuration object for grid focus behavior. |
options.columnsrequired | number | Number of columns in the grid. Used for up/down navigation (moves by this many cells). |
options.cellSelector | string (default: 'button:not([disabled]), [tabindex]:not([tabindex="-1"])') | Selector for focusable cells within the grid. |
options.onNavigateBefore | (column: number, offset: number) => void | Callback when navigation would go before the first cell. Receives the column index and offset (1 for horizontal, columns for vertical). |
options.onNavigateAfter | (column: number, offset: number) => void | Callback when navigation would go after the last cell. Receives the column index and offset. |
options.onPageUp | () => void | Callback for Page Up key (e.g., navigate to previous month in calendars). |
options.onPageDown | () => void | Callback for Page Down key (e.g., navigate to next month in calendars). |
| Field | Type | Description |
|---|---|---|
| gridRef | React.RefObject<HTMLElement | null> | Ref to attach to the grid container element. |
| handleKeyDown | (e: React.KeyboardEvent) => void | Key down handler to attach to the grid container. |
| focusCell | (index: number) => void | Focus a specific cell by index (clamped to valid range). |
| focusFirst | () => void | Focus the first focusable cell in the grid. |
| focusLast | () => void | Focus the last focusable cell in the grid. |