Question
Answer and Explanation
Maintaining row selection in a React Table across page refreshes requires you to persist the selected row data. Here's a breakdown of how to achieve this, along with code examples:
1. Utilize Local Storage or Session Storage:
- When a user selects a row, store the identifier of the selected row (e.g., the row's ID) in the browser's Local Storage or Session Storage. Local Storage persists data even after closing and reopening the browser, while Session Storage clears data upon closing the browser window/tab. Choose the storage option that matches the persistence requirements for your application.
2. Update Local Storage on Row Selection:
- In your React Table component, modify the row selection handler to store the IDs of the selected rows in local storage. For example, if you use react-table:
const handleRowSelection = (selectedRows) => {
const selectedIds = selectedRows.map(row => row.id);
localStorage.setItem('selectedRows', JSON.stringify(selectedIds));
setSelection(selectedRows);
};
3. Retrieve Selection on Component Mount:
- When your React Table component mounts (e.g., in a useEffect hook with an empty dependency array), retrieve the data from local storage and update the selected rows state. For example:
useEffect(() => {
const storedSelection = localStorage.getItem('selectedRows');
if (storedSelection) {
const selectedIds = JSON.parse(storedSelection);
const selectedRows = data.filter(row => selectedIds.includes(row.id));
setSelection(selectedRows);
}
}, [data]);
4. Sync Selection with React Table:
- Use the retrieved or newly updated selected rows to control your React Table's selection state. This usually involves updating your table's selected state and potentially any UI element that displays the selection.
5. Example Considerations:
- Make sure to handle cases where the data set might change (e.g., different data on subsequent page load). You might want to store more than just the row ids, or have logic to determine whether stored ids still match to rows
- If the row ID is not unique, you may need to select using a combination of unique values for each row, or use an alternative approach to identify the row.
By implementing these steps, your React Table will retain row selections even when the page is refreshed. Remember to test this functionality thoroughly to handle various scenarios and ensure a smooth user experience.