Overview for tabs
Angular Material tabs organize content into separate views where only one view can be visible at a time. Each tab's label is shown in the tab header and the active tab's label is designated with the animated ink bar. When the list of tab labels exceeds the width of the header, pagination controls appear to let the user scroll left and right across the labels.
The active tab may be set using the selectedIndex input or when the user selects one of the
tab labels in the header.
The selectedTabChange output event is emitted when the active tab changes.
The focusChange output event is emitted when the user puts focus on any of the tab labels in
the header, usually through keyboard navigation.
If a tab's label is only text then the simple tab-group API can be used.
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For more complex labels, add a template with the mat-tab-label directive inside the mat-tab.
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By default, the tab group will not change its height to the height of the currently active tab. To
change this, set the dynamicHeight input to true. The tab body will animate its height according
to the height of the active tab.
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While <mat-tab-group> is used to switch between views within a single route, <nav mat-tab-nav-bar>
provides a tab-like UI for navigating between routes.
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The tab-nav-bar is not tied to any particular router; it works with normal <a> elements and uses
the active property to determine which tab is currently active. The corresponding
<router-outlet> can be placed anywhere in the view.
By default, the tab contents are eagerly loaded. Eagerly loaded tabs will initalize the child components but not inject them into the DOM until the tab is activated.
If the tab contains several complex child components or the tab's contents rely on DOM calculations during initialization, it is advised to lazy load the tab's content.
Tab contents can be lazy loaded by declaring the body in a ng-template
with the matTabContent attribute.
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If you want to align the tab labels in the center or towards the end of the container, you can
do so using the [mat-align-tabs] attribute.
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You can control the duration of the tabs' animation using the animationDuration input. If you
want to disable the animation completely, you can do so by setting the properties to 0ms. The
duration can be configured globally using the MAT_TABS_CONFIG injection token.
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<mat-tab-group> and <mat-nav-tab-bar> use different interaction patterns. The
<mat-tab-group> component combines tablist, tab, and tabpanel into a single component with
the appropriate keyboard shortcuts. The <mat-nav-tab-bar>, however, use a navigation interaction
pattern by using a <nav> element with anchor elements as the "tabs". The difference
between these two patterns comes from the fact one updates the page URL while the other does not.
Tabs without text or labels should be given a meaningful label via aria-label or
aria-labelledby. For MatTabNav, the <nav> element should have a label as well.
| Shortcut | Action |
|---|---|
LEFT_ARROW |
Move focus to previous tab |
RIGHT_ARROW |
Move focus to next tab |
HOME |
Move focus to first tab |
END |
Move focus to last tab |
SPACE or ENTER |
Switch to focused tab |