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docs/fix-multi-select.md

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+# Solution: Keeping Dropdowns Open During Multiple Selections
+
+## The Problem
+
+When implementing a multi-select dropdown in React, a common issue occurs:
+
+1. You select an item in the dropdown
+2. The `onChange` handler is called, updating the data
+3. This triggers a re-render of the parent component (in this case, the entire table)
+4. During the re-render, the dropdown is unmounted and remounted
+5. This causes the dropdown to close before you can make multiple selections
+
+## The Solution: Deferred State Updates
+
+The key insight is to **separate local state management from parent state updates**:
+
+```typescript
+// Step 1: Add local state to track selections 
+const [internalValue, setInternalValue] = useState<string[]>(value)
+
+// Step 2: Handle popover open state changes
+const handleOpenChange = useCallback((newOpen: boolean) => {
+  if (open && !newOpen) {
+    // Only update parent state when dropdown closes
+    if (JSON.stringify(internalValue) !== JSON.stringify(value)) {
+      onChange(internalValue);
+    }
+  }
+  
+  setOpen(newOpen);
+  
+  if (newOpen) {
+    // Sync internal state with external state when opening
+    setInternalValue(value);
+  }
+}, [open, internalValue, value, onChange]);
+
+// Step 3: Toggle selection only updates internal state
+const toggleSelection = useCallback((selectedValue: string) => {
+  setInternalValue(prev => {
+    if (prev.includes(selectedValue)) {
+      return prev.filter(v => v !== selectedValue);
+    } else {
+      return [...prev, selectedValue];
+    }
+  });
+}, []);
+```
+
+## Why This Works
+
+1. **No parent re-renders during selection**: Since we're only updating local state, the parent component doesn't re-render during selection.
+2. **Consistent UI**: The dropdown shows accurate selected states using the internal value.
+3. **Data integrity**: The final selections are properly synchronized back to the parent when done.
+4. **Resilient to external changes**: Initial state is synchronized when opening the dropdown.
+
+## Implementation Steps
+
+1. Create a local state variable to track selections inside the component
+2. Only make selections against this local state while the dropdown is open
+3. Defer updating the parent until the dropdown is explicitly closed
+4. When opening, synchronize the internal state with the external value
+
+## Benefits
+
+This pattern:
+- Avoids re-render cycles that would unmount the dropdown
+- Maintains UI consistency during multi-selection
+- Simplifies the component's interaction with parent components
+- Works with existing component lifecycles rather than fighting against them
+
+This solution is much simpler than trying to prevent event propagation or manipulating DOM events, and addresses the root cause of the issue: premature re-rendering.