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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,7 @@ export const TabNavigationRoot: FC<TTabNavigationRootProps> = observer((props) =
const hiddenNavigationItems = allNavigationItems.filter((item) => tabPreferences.hiddenTabs.includes(item.key));

// Responsive tab layout hook
const { visibleItems, overflowItems, hasOverflow, containerRef, itemRefs } = useResponsiveTabLayout({
const { visibleItems, overflowItems, hasOverflow, itemRefs, containerRef } = useResponsiveTabLayout({
visibleNavigationItems,
hiddenNavigationItems,
isActive,
Expand Down
39 changes: 24 additions & 15 deletions apps/web/core/components/navigation/use-responsive-tab-layout.ts
Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
import { useEffect, useMemo, useRef, useState } from "react";
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import type { TNavigationItem } from "./tab-navigation-root";

export type TResponsiveTabLayout = {
visibleItems: TNavigationItem[];
overflowItems: TNavigationItem[];
hasOverflow: boolean;
containerRef: React.RefObject<HTMLDivElement>;
itemRefs: React.MutableRefObject<(HTMLDivElement | null)[]>;
containerRef: (node: HTMLDivElement | null) => void;
};

type UseResponsiveTabLayoutProps = {
Expand All @@ -30,9 +30,9 @@ export const useResponsiveTabLayout = ({
hiddenNavigationItems,
isActive,
}: UseResponsiveTabLayoutProps): TResponsiveTabLayout => {
// Refs for measuring space and items
const containerRef = useRef<HTMLDivElement>(null);
// Refs for measuring items
const itemRefs = useRef<(HTMLDivElement | null)[]>([]);
const resizeObserverRef = useRef<ResizeObserver | null>(null);

// State for responsive behavior
const [containerWidth, setContainerWidth] = useState<number>(0);
Expand All @@ -42,24 +42,33 @@ export const useResponsiveTabLayout = ({
const gap = 4; // gap-1 = 4px
const overflowButtonWidth = 40;

const container = containerRef?.current;
// Callback ref that sets up ResizeObserver when element is attached
const containerRef = useCallback((node: HTMLDivElement | null) => {
// Clean up previous observer if it exists
if (resizeObserverRef.current) {
resizeObserverRef.current.disconnect();
resizeObserverRef.current = null;
}

// ResizeObserver to measure container width
useEffect(() => {
if (!container) return;
// If node is null (unmounting), just clean up
if (!node) {
setContainerWidth(0);
return;
}

// Set initial width immediately
setContainerWidth(node.offsetWidth);

// Create and set up new ResizeObserver
const resizeObserver = new ResizeObserver((entries) => {
for (const entry of entries) {
setContainerWidth(entry.contentRect.width);
}
});

resizeObserver.observe(container);

return () => {
resizeObserver.disconnect();
};
}, [container]);
resizeObserverRef.current = resizeObserver;
resizeObserver.observe(node);
}, []); // Empty deps - callback function remains stable
Comment on lines 46 to 71
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Copilot AI Dec 2, 2025

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The ResizeObserver lacks proper cleanup on component unmount. If the component unmounts while a ResizeObserver callback is pending, it may attempt to call setContainerWidth on an unmounted component, potentially causing a memory leak or React warning.

Add a cleanup effect to ensure the observer is disconnected when the component unmounts:

useEffect(() => {
  return () => {
    if (resizeObserverRef.current) {
      resizeObserverRef.current.disconnect();
      resizeObserverRef.current = null;
    }
  };
}, []);

Copilot uses AI. Check for mistakes.

// Calculate how many items can fit
useEffect(() => {
Expand Down Expand Up @@ -137,7 +146,7 @@ export const useResponsiveTabLayout = ({
visibleItems,
overflowItems,
hasOverflow,
containerRef,
itemRefs,
containerRef,
};
};
Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@ export const SidebarProjectsListItem = observer(function SidebarProjectsListItem
const { getIsProjectListOpen, toggleProjectListOpen } = useCommandPalette();
const { toggleAnySidebarDropdown } = useAppTheme();
const { preferences: projectPreferences } = useProjectNavigationPreferences();
const { isExtendedProjectSidebarOpened, toggleExtendedProjectSidebar } = useAppTheme();

// states
const [leaveProjectModalOpen, setLeaveProjectModal] = useState(false);
Expand Down Expand Up @@ -259,6 +260,10 @@ export const SidebarProjectsListItem = observer(function SidebarProjectsListItem
} else {
router.push(defaultTabUrl);
}
// close the extended sidebar if it is open
if (isExtendedProjectSidebarOpened) {
toggleExtendedProjectSidebar(false);
}
};

const isAccordionMode = projectPreferences.navigationMode === "accordion";
Expand Down
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