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fix(tabs): honor hash-linked nav tabs #12303

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7e3c952
fix(tabs): honor hash-linked nav tabs
tarunvashishth Mar 28, 2026
9122887
fix(tabs): preserve initial hash selection
tarunvashishth Mar 29, 2026
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48 changes: 42 additions & 6 deletions packages/react-core/src/components/Tabs/Tabs.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,25 @@ const variantStyle = {
secondary: styles.modifiers.secondary
};

const getHashFromHref = (href?: string) => {
const hashIndex = href?.indexOf('#') ?? -1;

return hashIndex >= 0 ? href.slice(hashIndex) : undefined;
};

const getTabHashActiveKey = ({ children, component, isNav }: Pick<TabsProps, 'children' | 'component' | 'isNav'>) => {
if (!canUseDOM || !(component === TabsComponent.nav || isNav) || !window.location.hash) {
return undefined;
}

return Children.toArray(children)
.filter((child): child is TabElement => isValidElement(child))
.filter(({ props }) => !props.isHidden)
.find(
({ props }) => !props.isDisabled && !props.isAriaDisabled && getHashFromHref(props.href) === window.location.hash
)?.props.eventKey;
};
Comment on lines +145 to +156
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@coderabbitai coderabbitai bot Mar 28, 2026

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🛠️ Refactor suggestion | 🟠 Major

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Check if Tabs tests have any hash-related setup
rg -n "location.hash|window.location" packages/react-core/src/components/Tabs/__tests__/

Repository: patternfly/patternfly-react

Length of output: 53

Add test coverage for the getTabHashActiveKey function with hash-based navigation.

The new getTabHashActiveKey function accesses window.location.hash and should be tested to ensure the hash-based tab selection works correctly and prevent regressions. Currently, no hash-related test setup exists in the Tabs tests, while the Nav component tests demonstrate the pattern with window.location.hash setup in a beforeEach block.

🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@packages/react-core/src/components/Tabs/Tabs.tsx` around lines 145 - 156,
Tests are missing for getTabHashActiveKey to verify hash-based selection; add
unit tests in the Tabs spec that set window.location.hash (use a beforeEach to
assign a hash and afterEach to clear it) and assert getTabHashActiveKey (via
rendering Tabs or importing the function if exported) returns the expected
eventKey when a child TabElement has matching href, and does not return keys for
hidden/disabled tabs or when component/isNav conditions are unmet; target the
getTabHashActiveKey logic and exercise Tabs/TabsProps behavior with TabElement
props (href, isHidden, isDisabled, isAriaDisabled) so hash-based navigation is
covered.


interface TabsState {
/** Used to signal if the scroll buttons should be used */
enableScrollButtons: boolean;
Expand All @@ -148,7 +167,8 @@ interface TabsState {
disableBackScrollButton: boolean;
disableForwardScrollButton: boolean;
shownKeys: (string | number)[];
uncontrolledActiveKey: number | string;
uncontrolledActiveKey: number | string | undefined;
initialActiveKey: number | string | undefined;
uncontrolledIsExpandedLocal: boolean;
ouiaStateId: string;
overflowingTabCount: number;
Expand All @@ -164,14 +184,20 @@ class Tabs extends Component<TabsProps, TabsState> {
private direction = 'ltr';
constructor(props: TabsProps) {
super(props);
const hashActiveKey = getTabHashActiveKey(props);

this.state = {
enableScrollButtons: false,
showScrollButtons: false,
renderScrollButtons: false,
disableBackScrollButton: true,
disableForwardScrollButton: true,
shownKeys: this.props.defaultActiveKey !== undefined ? [this.props.defaultActiveKey] : [this.props.activeKey], // only for mountOnEnter case
uncontrolledActiveKey: this.props.defaultActiveKey,
shownKeys:
this.props.defaultActiveKey !== undefined
? [hashActiveKey ?? this.props.defaultActiveKey]
: [hashActiveKey ?? this.props.activeKey], // only for mountOnEnter case
uncontrolledActiveKey: hashActiveKey ?? this.props.defaultActiveKey,
initialActiveKey: this.props.defaultActiveKey === undefined ? hashActiveKey : undefined,
uncontrolledIsExpandedLocal: this.props.defaultIsExpanded,
ouiaStateId: getDefaultOUIAId(Tabs.displayName),
overflowingTabCount: 0,
Expand Down Expand Up @@ -219,14 +245,18 @@ class Tabs extends Component<TabsProps, TabsState> {
eventKey: number | string,
tabContentRef: React.RefObject<any>
) {
const { shownKeys } = this.state;
const { shownKeys, initialActiveKey } = this.state;
const { onSelect, defaultActiveKey } = this.props;

// if defaultActiveKey Tabs are uncontrolled, set new active key internally
if (defaultActiveKey !== undefined) {
this.setState({
uncontrolledActiveKey: eventKey
});
} else {
if (initialActiveKey !== undefined) {
this.setState({ initialActiveKey: undefined });
}
onSelect(event, eventKey);
}

Expand Down Expand Up @@ -399,8 +429,9 @@ class Tabs extends Component<TabsProps, TabsState> {
componentDidUpdate(prevProps: TabsProps, prevState: TabsState) {
this.direction = getLanguageDirection(this.tabList.current);
const { activeKey, mountOnEnter, isOverflowHorizontal, children, defaultActiveKey } = this.props;
const { shownKeys, overflowingTabCount, enableScrollButtons, uncontrolledActiveKey } = this.state;
const { shownKeys, overflowingTabCount, enableScrollButtons, uncontrolledActiveKey, initialActiveKey } = this.state;
const isOnCloseUpdate = !!prevProps.onClose !== !!this.props.onClose;

if (
(defaultActiveKey !== undefined && prevState.uncontrolledActiveKey !== uncontrolledActiveKey) ||
(defaultActiveKey === undefined && prevProps.activeKey !== activeKey) ||
Expand All @@ -415,6 +446,10 @@ class Tabs extends Component<TabsProps, TabsState> {
});
}

if (defaultActiveKey === undefined && prevProps.activeKey !== activeKey && initialActiveKey !== undefined) {
this.setState({ initialActiveKey: undefined });
}

if (
prevProps.children &&
children &&
Expand Down Expand Up @@ -513,6 +548,7 @@ class Tabs extends Component<TabsProps, TabsState> {
disableForwardScrollButton,
shownKeys,
uncontrolledActiveKey,
initialActiveKey,
uncontrolledIsExpandedLocal,
overflowingTabCount,
isInitializingAccent,
Expand All @@ -530,7 +566,7 @@ class Tabs extends Component<TabsProps, TabsState> {
const uniqueId = id || getUniqueId();
const defaultComponent = isNav && !component ? 'nav' : 'div';
const Component: any = component !== undefined ? component : defaultComponent;
const localActiveKey = defaultActiveKey !== undefined ? uncontrolledActiveKey : activeKey;
const localActiveKey = defaultActiveKey !== undefined ? uncontrolledActiveKey : (initialActiveKey ?? activeKey);

const isExpandedLocal = defaultIsExpanded !== undefined ? uncontrolledIsExpandedLocal : isExpanded;
/* Uncontrolled expandable tabs */
Expand Down
126 changes: 125 additions & 1 deletion packages/react-core/src/components/Tabs/__tests__/Tabs.test.tsx
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@ import { TabTitleText } from '../TabTitleText';
import { TabTitleIcon } from '../TabTitleIcon';
import { TabContent } from '../TabContent';
import { TabContentBody } from '../TabContentBody';
import { createRef } from 'react';
import { createRef, useState } from 'react';

jest.mock('../../../helpers/GenerateId/GenerateId');

Expand Down Expand Up @@ -119,6 +119,130 @@ test(`Does not render with class ${styles.modifiers.initializingAccent} when com
jest.useRealTimers();
});

describe('hash-based nav selection', () => {
beforeEach(() => {
window.location.hash = '#/items/2';
});

afterEach(() => {
window.location.hash = '';
});

test('should select the nav tab that matches the current URL hash on initial render', () => {
render(
<Tabs activeKey={0} onSelect={() => undefined} component="nav">
<Tab eventKey={0} title={<TabTitleText>Tab item 1</TabTitleText>} href="#/items/1">
Tab item 1
</Tab>
<Tab eventKey={1} title={<TabTitleText>Tab item 2</TabTitleText>} href="#/items/2">
Tab item 2
</Tab>
<Tab eventKey={2} title={<TabTitleText>Tab item 3</TabTitleText>} href="#/items/3">
Tab item 3
</Tab>
</Tabs>
);

expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'true');
expect(screen.getByRole('tab', { name: 'Tab item 1' })).toHaveAttribute('aria-selected', 'false');
});

test('should respect later controlled selections after the initial hash match', async () => {
const user = userEvent.setup();
const ControlledTabs = () => {
const [activeKey, setActiveKey] = useState<string | number>(0);

return (
<Tabs activeKey={activeKey} onSelect={(_event, eventKey) => setActiveKey(eventKey)} component="nav">
<Tab eventKey={0} title={<TabTitleText>Tab item 1</TabTitleText>} href="#/items/1">
Tab item 1
</Tab>
<Tab eventKey={1} title={<TabTitleText>Tab item 2</TabTitleText>} href="#/items/2">
Tab item 2
</Tab>
<Tab eventKey={2} title={<TabTitleText>Tab item 3</TabTitleText>} href="#/items/3">
Tab item 3
</Tab>
</Tabs>
);
};

render(<ControlledTabs />);

expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'true');

await user.click(screen.getByRole('tab', { name: 'Tab item 3' }));

expect(screen.getByRole('tab', { name: 'Tab item 3' })).toHaveAttribute('aria-selected', 'true');
expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'false');
});

test('should use the URL hash to initialize uncontrolled nav tabs', async () => {
const user = userEvent.setup();

render(
<Tabs defaultActiveKey={0} isNav>
<Tab eventKey={0} title={<TabTitleText>Tab item 1</TabTitleText>} href="#/items/1">
Tab item 1
</Tab>
<Tab eventKey={1} title={<TabTitleText>Tab item 2</TabTitleText>} href="#/items/2">
Tab item 2
</Tab>
<Tab eventKey={2} title={<TabTitleText>Tab item 3</TabTitleText>} href="#/items/3">
Tab item 3
</Tab>
</Tabs>
);

expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'true');

await user.click(screen.getByRole('tab', { name: 'Tab item 1' }));

expect(screen.getByRole('tab', { name: 'Tab item 1' })).toHaveAttribute('aria-selected', 'true');
expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'false');
});

test('should ignore hidden, disabled and aria-disabled tabs when matching the current hash', () => {
render(
<Tabs activeKey={0} onSelect={() => undefined} component="nav">
<Tab eventKey={0} title={<TabTitleText>Tab item 1</TabTitleText>} href="#/items/1">
Tab item 1
</Tab>
<Tab eventKey={1} title={<TabTitleText>Hidden tab</TabTitleText>} href="#/items/2" isHidden>
Hidden tab
</Tab>
<Tab eventKey={2} title={<TabTitleText>Disabled tab</TabTitleText>} href="#/items/2" isDisabled>
Disabled tab
</Tab>
<Tab eventKey={3} title={<TabTitleText>Aria disabled tab</TabTitleText>} href="#/items/2" isAriaDisabled>
Aria disabled tab
</Tab>
</Tabs>
);

expect(screen.queryByRole('tab', { name: 'Hidden tab' })).not.toBeInTheDocument();
expect(screen.getByRole('tab', { name: 'Tab item 1' })).toHaveAttribute('aria-selected', 'true');
expect(screen.getByRole('tab', { name: 'Disabled tab' })).toHaveAttribute('aria-selected', 'false');
expect(screen.getByRole('tab', { name: 'Aria disabled tab' })).toHaveAttribute('aria-selected', 'false');
});

test('should ignore the current URL hash when nav behavior is not enabled', () => {
render(
<Tabs activeKey={0} onSelect={() => undefined}>
<Tab eventKey={0} title={<TabTitleText>Tab item 1</TabTitleText>} href="#/items/1">
Tab item 1
</Tab>
<Tab eventKey={1} title={<TabTitleText>Tab item 2</TabTitleText>} href="#/items/2">
Tab item 2
</Tab>
</Tabs>
);

expect(screen.getByRole('tab', { name: 'Tab item 1' })).toHaveAttribute('aria-selected', 'true');
expect(screen.getByRole('tab', { name: 'Tab item 2' })).toHaveAttribute('aria-selected', 'false');
});
});

test(`Renders with class ${styles.modifiers.initializingAccent} when uncontrolled expandable component initially mounts`, async () => {
const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });

Expand Down
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