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fix(cdk-experimental/tabs): add default aria-labelledby to tab panel #31388

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fix(cdk-experimental/tabs): add default aria-labelledby to tab panel #31388

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6 changes: 6 additions & 0 deletions src/cdk-experimental/tabs/tabs.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -234,6 +234,12 @@ describe('CdkTabs', () => {
expect(tabPanelElements[2].getAttribute('tabindex')).toBe('-1');
});

it('should have aria-labelledby pointing to its tab id', () => {
expect(tabPanelElements[0].getAttribute('aria-labelledby')).toBe(tabElements[0].id);
expect(tabPanelElements[1].getAttribute('aria-labelledby')).toBe(tabElements[1].id);
expect(tabPanelElements[2].getAttribute('aria-labelledby')).toBe(tabElements[2].id);
});

it('should have inert attribute when hidden and not when visible', () => {
updateTabs({selectedTab: 'tab1'});
expect(tabPanelElements[0].hasAttribute('inert')).toBe(false);
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1 change: 1 addition & 0 deletions src/cdk-experimental/tabs/tabs.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,7 @@ export class CdkTab implements HasElement, OnInit, OnDestroy {
'[attr.id]': 'pattern.id()',
'[attr.tabindex]': 'pattern.tabindex()',
'[attr.inert]': 'pattern.hidden() ? true : null',
'[attr.aria-labelledby]': 'tab()?.id()',
},
hostDirectives: [
{
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