feat(APP-3954): Update Tab component to not render the TabList when there is a single child

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Changed
 
+- Update `Tabs.List` component to only render when used with multiple tabs
 - Bump `elliptic` to 6.6.1
 
 ## [1.0.66] - 2025-02-11

src/core/components/tabs/tabsList/tabsList.test.tsx

@@ -1,26 +1,34 @@
-// TabsRoot.test.tsx
 import { render, screen } from '@testing-library/react';
-import { Tabs, type ITabsListProps } from '../../tabs';
+import { type ITabsListProps, Tabs } from '../../tabs';
 
-describe('<Tabs.Root /> component', () => {
+describe('<Tabs.List /> component', () => {
     const createTestComponent = (props?: Partial<ITabsListProps>) => {
         const completeProps: ITabsListProps = {
             ...props,
         };
+
         return (
             <Tabs.Root>
-                <Tabs.List {...completeProps}>
-                    <Tabs.Trigger label="Tab 1" value="1" />
-                    <Tabs.Trigger label="Tab 2" value="2" />
-                </Tabs.List>
+                <Tabs.List {...completeProps} />
             </Tabs.Root>
         );
     };
 
-    it('should render multiple tab triggers without crashing', () => {
-        render(createTestComponent());
+    it('renders multiple tab triggers', () => {
+        const children = [
+            <Tabs.Trigger key="1" label="Tab 1" value="1" />,
+            <Tabs.Trigger key="2" label="Tab 2" value="2" />,
+        ];
+        render(createTestComponent({ children }));
 
         expect(screen.getByText('Tab 1')).toBeInTheDocument();
         expect(screen.getByText('Tab 2')).toBeInTheDocument();
     });
+
+    it('renders null when only a single tab trigger is present', () => {
+        const children = <Tabs.Trigger label="Tab 1" value="1" />;
+        render(createTestComponent({ children }));
+
+        expect(screen.queryByText('Tab 1')).not.toBeInTheDocument();
+    });
 });

src/core/components/tabs/tabsList/tabsList.tsx

@@ -1,6 +1,6 @@
 import { TabsList as RadixTabsList } from '@radix-ui/react-tabs';
 import classNames from 'classnames';
-import { useContext, type ComponentProps } from 'react';
+import { Children, useContext, type ComponentProps } from 'react';
 import { TabsContext } from '../tabsRoot/tabsRoot';
 
 export interface ITabsListProps extends ComponentProps<'div'> {}
@@ -11,6 +11,11 @@ export const TabsList: React.FC<ITabsListProps> = (props) => {
 
     const tabsListClassNames = classNames('flex gap-x-6', { 'border-b border-neutral-100': isUnderlined }, className);
 
+    // If there is only a single child then the tabs are redundant and we just show the content
+    if (Children.count(children) === 1) {
+        return null;
+    }
+
     return (
         <RadixTabsList className={tabsListClassNames} {...otherProps}>
             {children}

src/core/components/tabs/tabsRoot/tabsRoot.stories.tsx

@@ -70,4 +70,24 @@ export const InsideCard: Story = {
     render: (args) => <Card className="p-6">{reusableStoryComponent(args)}</Card>,
 };
 
+/**
+ * Usage example of a Tabs component with a single tab with the default value.
+ * Make sure to set the `defaultValue` or `value` property to select and show the content of the tab.
+ */
+export const SingleTab: Story = {
+    args: { defaultValue: '1' },
+    render: (args) => (
+        <Tabs.Root {...args}>
+            <Tabs.List>
+                <Tabs.Trigger label="Default Tab" value="1" />
+            </Tabs.List>
+            <Tabs.Content value="1">
+                <div className="flex h-24 w-96 items-center justify-center border border-dashed border-info-300 bg-info-100">
+                    Item 1 Content
+                </div>
+            </Tabs.Content>
+        </Tabs.Root>
+    ),
+};
+
 export default meta;

src/core/components/tabs/tabsTrigger/tabsTrigger.test.tsx

@@ -1,3 +1,4 @@
+import { TabsList as RadixTabsList, Tabs as RadixTabsRoot } from '@radix-ui/react-tabs';
 import { render, screen } from '@testing-library/react';
 import { IconType } from '../../icon';
 import { Tabs, type ITabsTriggerProps } from '../../tabs';
@@ -11,11 +12,11 @@ describe('<Tabs.Trigger /> component', () => {
         };
 
         return (
-            <Tabs.Root>
-                <Tabs.List>
+            <RadixTabsRoot>
+                <RadixTabsList>
                     <Tabs.Trigger {...completeProps} />
-                </Tabs.List>
-            </Tabs.Root>
+                </RadixTabsList>
+            </RadixTabsRoot>
         );
     };
 
@@ -33,8 +34,8 @@ describe('<Tabs.Trigger /> component', () => {
     });
 
     it('disables the tab when the disabled property is set to true', () => {
-        const disabled = true;
-        render(createTestComponent({ disabled }));
-        expect(screen.getByRole('tab').getAttribute('disabled')).toEqual('');
+        render(createTestComponent({ disabled: true }));
+        const tab = screen.getByRole('tab');
+        expect(tab.getAttribute('disabled')).toEqual('');
     });
 });