@rmwc/tabs

Tabs

Tabs make it easy to explore and switch between different views.

• Module @rmwc/tabs
• Import styles:
  • Using CSS Loader
    • import '@rmwc/tabs/styles';
  • Or include stylesheets
    • '@material/tab-bar/dist/mdc.tab-bar.css'
    • '@material/tab/dist/mdc.tab.css'
    • '@material/tab-scroller/dist/mdc.tab-scroller.css'
    • '@material/tab-indicator/dist/mdc.tab-indicator.css'
    • '@material/ripple/dist/mdc.ripple.css'
    • '@rmwc/icon/icon.css'
• MDC Docs: https://material.io/develop/web/components/tabs/tab-bar/

Basic Usage

Tabs can be either controlled or uncontrolled just like inputs. Use the activeTabIndex and onActivate callback for controlled components.

<TabBar>
  <Tab>Cookies</Tab>
  <Tab>Pizza</Tab>
  <Tab>Icecream</Tab>
</TabBar>

function Example() {
  const [activeTab, setActiveTab] = React.useState(0);

  return (
    <TabBar
      activeTabIndex={activeTab}
      onActivate={(evt) => setActiveTab(evt.detail.index)}
    >
      <Tab>Cookies</Tab>
      <Tab>Pizza</Tab>
      <Tab>Icecream</Tab>
    </TabBar>
  );
}

Variants

<TabBar>
  <Tab>Cookies</Tab>
  <Tab>Pizza</Tab>
  <Tab>Icecream</Tab>
</TabBar>

<TabBar>
  <Tab icon="star_border" label="Cookies" />
  <Tab icon="favorite_border" label="Pizza" />
  <Tab icon="mood" label="Icecream" />
</TabBar>

<TabBar>
  <Tab icon="star_border" />
  <Tab icon="favorite_border" />
  <Tab icon="mood" />
</TabBar>

<TabBar>
  <Tab stacked icon="star_border" label="Cookies" />
  <Tab stacked icon="favorite_border" label="Pizza" />
  <Tab stacked icon="mood" label="Icecream" />
</TabBar>

<TabBar>
  <Tab stacked restrictIndicator icon="star_border" label="Cookies" />
  <Tab stacked restrictIndicator icon="favorite_border" label="Pizza" />
  <Tab stacked restrictIndicator icon="mood" label="Icecream" />
</TabBar>

<TabBar>
  {/* Tabs automatically scroll with lots of content. */}
  <Tab>Cookies</Tab>
  <Tab>Pizza</Tab>
  <Tab>Icecream</Tab>
  <Tab>Chocolate</Tab>
  <Tab>Fishsticks</Tab>
  <Tab>Ratatouille</Tab>
  <Tab>Bread</Tab>
  <Tab>Rolls</Tab>
  <Tab>Sushi</Tab>
  <Tab>Cupcake</Tab>
  <Tab>Cheesecake</Tab>
</TabBar>

Transitions

<TabBar>
  <Tab>Cookies</Tab>
  <Tab>Pizza</Tab>
  <Tab>Icecream</Tab>
</TabBar>

Icons as Indicators

material-components-web has some light support for using icons as indicators (it's buried in their docs but there are no working examples or demos). Support has been added to RMWC, but your mileage may vary since it will require quite a bit of manual positioning and styling. By default, the icons appear full size at the center of the tab, effectively making them overlay images.

<TabBar>
  <Tab iconIndicator="star">Cookies</Tab>
  <Tab iconIndicator="favorite">Pizza</Tab>
  <Tab iconIndicator="mood">Icecream</Tab>
</TabBar>

<>
  {function IconIndicatorExample() {
    const style = {
      transformOrigin: 'center center',
      transform: 'translateY(1rem) scale(0.45)'
    };

    return (
      <TabBar>
        <Tab
          label="Cookies"
          iconIndicator={{
            icon: 'star',
            style: style
          }}
        />
        <Tab
          label="Pizza"
          iconIndicator={{
            icon: 'favorite',
            style: style
          }}
        />
        <Tab
          label="Icecream"
          iconIndicator={{
            icon: 'mood',
            style: style
          }}
        />
      </TabBar>
    );
  }}
</>

TabBar

The TabBar component

Props

Name	Type	Description
activeTabIndex	number	The index of the active tab.
foundationRef	Ref<null | MDCTabBarFoundation<>>	Advanced: A reference to the MDCFoundation.
indicatorTransition	"slide" | "fade"	Specifies whether the indicator should slide or fade. Defaults to slide.
onActivate	(evt: TabBarOnActivateEventT) => void	Callback when the active tab changes. Receives event as an argument with event.target.value set to the activeTabIndex. evt.detail = { index: number; }

Tab

A Tab component

Props

Name	Type	Description
children	ReactNode	The label for the tab, passed as children.
focusOnActivate	boolean	Focuses the tab when activated. Defaults to true.
foundationRef	Ref<null | MDCTabFoundation<>>	Advanced: A reference to the MDCFoundation.
icon	IconPropT	The icon to use for the tab.
iconIndicator	IconPropT	Optionally use a custom icon for the active indicator, instead of the underline.
label	any	A label for the tab.
minWidth	boolean	Indicates that the tab should shrink in size to be as narrow as possible without causing text to wrap.
onInteraction	(evt: TabOnInteractionEventT) => void	Fires when a tab has been interacted with. This is captures both keyboard and click events. evt.detail = { tabId: string }
restrictIndicator	boolean	Restricts the indicator to the content
stacked	boolean	Stacks the icon on top of the text label