ionic-framework/core/src/components/tabs

ion-tabs

Tabs are a top level navigation component to implement a tab-based navigation. The component is a container of individual Tab components.

ion-tabs is a styleless component that works as a router outlet in order to handle navigation. This component does not provide any UI feedback or mechanism to switch between tabs. In order to do so, an ion-tab-bar should be provided as a direct child of ion-tabs:

<ion-tabs>
  <ion-tab tab="home">Home Content</ion-tab>
  <ion-tab tab="settings">Settings Content</ion-tab>

  <ion-tab-bar slot="bottom">

    <ion-tab-button tab="home">
      <ion-label>Home</ion-label>
      <ion-icon name="home"></ion-icon>
      <ion-badge>6</ion-badge>
    </ion-tab-button>

    <ion-tab-button tab="settings">
      <ion-label>Settings</ion-label>
      <ion-icon name="settings"></ion-icon>
    </ion-tab-button>

  </ion-tab-bar>
</ion-tabs>

Note that both ion-tabs and ion-tab-bar can be used as standalone elements. They don’t depend on each other to work, but they are usually used together in order to implement a tab-based navigation that feels like a native app.

ion-tab-bar always needs slot="bottom" in order to be projected into ion-tabs at the right place.

The "tab" property

Each ion-tab-button will activate one of the tabs when tapped. In order to link the button to the ion-tab container, a matching tab property must be used.

<ion-tab tab="settings">
[...]
<ion-tab-button tab="settings">

This ion-tab-button and ion-tab are now linked by the common tab property.

The tab property identifies each tab, and it has to be unique within the scope of the same ion-tabs. It's important to set the same property to ion-tab and ion-tab-button, even if you are only using one. e.g. You could use the ion-tab-bar without using ion-tabs. In this case you should still give each ion-tab the property of tab="something".

Router integration

When the ionic's router (ion-router) is used, the tab property matches the "component" of ion-route:

The following route within the scope of a ion-tabs outlet:

<ion-route path="/settings-page" component="settings"></ion-route>

Would match the following tab:

<ion-tab tab="settings" component="settings-component"></ion-tab>

Angular Router integration

Using tabs with Angular's router is fairly straight forward. The only additional requirement is that an href is supplied to update the browser URL. In this way, the correct ion-tab is selected, and the URl is updated.

<ion-tabs>
  <ion-tab-bar slot="bottom">
    <ion-tab-button tab="schedule" href="/app/tabs/(schedule:schedule)">
      <ion-icon name="calendar"></ion-icon>
      <ion-label>Schedule</ion-label>
    </ion-tab-button>
  </ion-tab-bar>

  <ion-tab tab="schedule">
    <ion-router-outlet name="schedule"></ion-router-outlet>
  </ion-tab>
</ion-tabs>

Events

Event	Description	Detail
ionChange	Emitted when the tab changes.	{tab: HTMLIonTabElement}
ionNavDidChange	Emitted when the navigation has finished transitioning to a new component.	void
ionNavWillChange	Emitted when the navigation is about to transition to a new component.	void
ionNavWillLoad	Emitted when the navigation will load a component.	void

Methods

getSelected() => Promise<HTMLIonTabElement | undefined>

Get the currently selected tab

Returns

Type: Promise<HTMLIonTabElement | undefined>

getTab(tab: string | HTMLIonTabElement) => Promise<HTMLIonTabElement | undefined>

Get the tab at the given index

Parameters

Name	Type	Description
tab	HTMLIonTabElement | string

Returns

Type: Promise<HTMLIonTabElement | undefined>

select(tab: string | HTMLIonTabElement) => Promise<boolean>

Index or the Tab instance, of the tab to select.

Parameters

Name	Type	Description
tab	HTMLIonTabElement | string

Returns

Type: Promise<boolean>

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