ion-tabs

shadow

Contents

• Interfaces
• Usage
• Events
• Methods
• Slots

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

The ion-tabs component does not have any styling and works as a router outlet in order to handle navigation. It 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.

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 behaves like a native app.

The ion-tab-bar needs a slot defined in order to be projected to the right place in an ion-tabs component.

Interfaces

TabsCustomEvent

While not required, this interface can be used in place of the CustomEvent interface for stronger typing with Ionic events emitted from this component.

interface TabsCustomEvent extends CustomEvent {
  detail: { tab: string };
  target: HTMLIonTabsElement;
}

Usage

Angular

<ion-tabs>
  <ion-tab-bar slot="bottom">
    <ion-tab-button tab="schedule">
      <ion-icon name="calendar"></ion-icon>
      <ion-label>Schedule</ion-label>
      <ion-badge>6</ion-badge>
    </ion-tab-button>

    <ion-tab-button tab="speakers">
      <ion-icon name="person-circle"></ion-icon>
      <ion-label>Speakers</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="map">
      <ion-icon name="map"></ion-icon>
      <ion-label>Map</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="about">
      <ion-icon name="information-circle"></ion-icon>
      <ion-label>About</ion-label>
    </ion-tab-button>
  </ion-tab-bar>
</ion-tabs>

Router integration

When used with Angular's router the tab property of the ion-tab-button should be a reference to the route path.

<ion-tabs>
  <ion-tab-bar slot="bottom">
    <ion-tab-button tab="schedule">
      <ion-icon name="calendar"></ion-icon>
      <ion-label>Schedule</ion-label>
    </ion-tab-button>
  </ion-tab-bar>
</ion-tabs>

import { Routes } from '@angular/router';
import { TabsPage } from './tabs-page';

const routes: Routes = [
  {
    path: 'tabs',
    component: TabsPage,
    children: [
      {
        path: 'schedule',
        children: [
          {
            path: '',
            loadChildren: '../schedule/schedule.module#ScheduleModule'
          }
        ]
      },
      {
        path: '',
        redirectTo: '/app/tabs/schedule',
        pathMatch: 'full'
      }
    ]
  }
];

Javascript

<ion-tabs>

  <ion-tab tab="tab-schedule">
    <ion-nav></ion-nav>
  </ion-tab>

  <ion-tab tab="tab-speaker">
    <ion-nav></ion-nav>
  </ion-tab>

  <ion-tab tab="tab-map" component="page-map">
    <ion-nav></ion-nav>
  </ion-tab>

  <ion-tab tab="tab-about" component="page-about">
    <ion-nav></ion-nav>
  </ion-tab>

  <ion-tab-bar slot="bottom">
    <ion-tab-button tab="tab-schedule">
      <ion-icon name="calendar"></ion-icon>
      <ion-label>Schedule</ion-label>
      <ion-badge>6</ion-badge>
    </ion-tab-button>

    <ion-tab-button tab="tab-speaker">
      <ion-icon name="person-circle"></ion-icon>
      <ion-label>Speakers</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="tab-map">
      <ion-icon name="map"></ion-icon>
      <ion-label>Map</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="tab-about">
      <ion-icon name="information-circle"></ion-icon>
      <ion-label>About</ion-label>
    </ion-tab-button>
  </ion-tab-bar>

</ion-tabs>

Activating Tabs

Each ion-tab-button will activate one of the tabs when pressed. In order to link the ion-tab-button to the ion-tab container, a matching tab property should be set on each component.

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

<ion-tab-button tab="settings">
  ...
</ion-tab-button>

The ion-tab-button and ion-tab above are linked by the common tab property.

The tab property identifies each tab, and it has to be unique within the ion-tabs. It's important to always set the tab property on the ion-tab and ion-tab-button, even if one component is not used.

Router integration

When used with Ionic's router (ion-router) the tab property of the ion-tab matches the component property of an ion-route.

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

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

will match the following tab:

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

React

import React from 'react';
import { IonTabs, IonTabBar, IonTabButton, IonIcon, IonLabel, IonBadge } from '@ionic/react';
import { calendar, personCircle, map, informationCircle } from 'ionicons/icons';


export const TabsExample: React.FC = () => (
  <IonTabs>
    <IonTabBar slot="bottom">
      <IonTabButton tab="schedule">
        <IonIcon icon={calendar} />
        <IonLabel>Schedule</IonLabel>
        <IonBadge>6</IonBadge>
      </IonTabButton>

      <IonTabButton tab="speakers">
        <IonIcon icon={personCircle} />
        <IonLabel>Speakers</IonLabel>
      </IonTabButton>

      <IonTabButton tab="map">
        <IonIcon icon={map} />
        <IonLabel>Map</IonLabel>
      </IonTabButton>

      <IonTabButton tab="about">
        <IonIcon icon={informationCircle} />
        <IonLabel>About</IonLabel>
      </IonTabButton>
    </IonTabBar>
  </IonTabs>
);

Stencil

import { Component, h } from '@stencil/core';

@Component({
  tag: 'tabs-example',
  styleUrl: 'tabs-example.css'
})
export class TabsExample {
  render() {
    return [
     <ion-tabs>
      <ion-tab tab="tab-schedule">
        <ion-nav></ion-nav>
      </ion-tab>

      <ion-tab tab="tab-speaker">
        <ion-nav></ion-nav>
      </ion-tab>

      <ion-tab tab="tab-map" component="page-map">
        <ion-nav></ion-nav>
      </ion-tab>

      <ion-tab tab="tab-about" component="page-about">
        <ion-nav></ion-nav>
      </ion-tab>

      <ion-tab-bar slot="bottom">
        <ion-tab-button tab="tab-schedule">
          <ion-icon name="calendar"></ion-icon>
          <ion-label>Schedule</ion-label>
          <ion-badge>6</ion-badge>
        </ion-tab-button>

        <ion-tab-button tab="tab-speaker">
          <ion-icon name="person-circle"></ion-icon>
          <ion-label>Speakers</ion-label>
        </ion-tab-button>

        <ion-tab-button tab="tab-map">
          <ion-icon name="map"></ion-icon>
          <ion-label>Map</ion-label>
        </ion-tab-button>

        <ion-tab-button tab="tab-about">
          <ion-icon name="information-circle"></ion-icon>
          <ion-label>About</ion-label>
        </ion-tab-button>
      </ion-tab-bar>

    </ion-tabs>
    ];
  }
}

Activating Tabs

Each ion-tab-button will activate one of the tabs when pressed. In order to link the ion-tab-button to the ion-tab container, a matching tab property should be set on each component.

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

<ion-tab-button tab="settings">
  ...
</ion-tab-button>

The ion-tab-button and ion-tab above are linked by the common tab property.

The tab property identifies each tab, and it has to be unique within the ion-tabs. It's important to always set the tab property on the ion-tab and ion-tab-button, even if one component is not used.

Router integration

When used with Ionic's router (ion-router) the tab property of the ion-tab matches the component property of an ion-route.

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

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

will match the following tab:

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

Vue

Tabs.vue

<template>
  <ion-page>
    <ion-tabs @ionTabsWillChange="beforeTabChange" @ionTabsDidChange="afterTabChange">
      <ion-tab-bar slot="bottom">
        <ion-tab-button tab="schedule" href="/tabs/schedule">
          <ion-icon :icon="calendar"></ion-icon>
          <ion-label>Schedule</ion-label>
          <ion-badge>6</ion-badge>
        </ion-tab-button>
  
        <ion-tab-button tab="speakers" href="/tabs/speakers">
          <ion-icon :icon="personCircle"></ion-icon>
          <ion-label>Speakers</ion-label>
        </ion-tab-button>
      </ion-tab-bar>
    </ion-tabs>
  </ion-page>
</template>

<script>
import { defineComponent } from 'vue';
import { 
  IonIcon, 
  IonLabel, 
  IonPage,
  IonTabBar, 
  IonTabButton, 
  IonTabs
} from '@ionic/vue';
import { calendar, personCircle } from 'ionicons/icons';

export default defineComponent({
  components: { IonIcon, IonLabel, IonPage, IonTabBar, IonTabButton, IonTabs },
  setup() {
    const beforeTabChange = () => {
      // do something before tab change
    }
    const afterTabChange = () => {
      // do something after tab change
    }
    return {
      calendar,
      personCircle,
      beforeTabChange,
      afterTabChange
    }
  }
});
</script>

Schedule.vue

<template>
  <ion-page>
    <ion-header>
      <ion-toolbar>
        <ion-title>Schedule</ion-title>
      </ion-toolbar>
    </ion-header>
    
    <ion-content class="ion-padding">Schedule Tab</ion-content>
  </ion-page>
</template>

<script>
import { defineComponent } from 'vue';
import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar
} from '@ionic/vue';

export default defineComponent({
  components: { IonContent, IonHeader, IonPage, IonTitle, IonToolbar }
});
</script>

Speakers.vue

<template>
  <ion-page>
    <ion-header>
      <ion-toolbar>
        <ion-title>Speakers</ion-title>
      </ion-toolbar>
    </ion-header>
    
    <ion-content class="ion-padding">Speakers Tab</ion-content>
  </ion-page>
</template>

<script>
import { defineComponent } from 'vue';
import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar
} from '@ionic/vue';

export default defineComponent({
  components: { IonContent, IonHeader, IonPage, IonTitle, IonToolbar }
});
</script>

Events

Name	Description
ionTabsDidChange	Emitted when the navigation has finished transitioning to a new component.
ionTabsWillChange	Emitted when the navigation is about to transition to a new component.

Methods

getSelected

Description	Get the currently selected tab.
Signature	getSelected() => Promise<string ｜ undefined>

getTab

Description	Get a specific tab by the value of its tab property or an element reference.
Signature	getTab(tab: string ｜ HTMLIonTabElement) => Promise<HTMLIonTabElement ｜ undefined>

select

Description	Select a tab by the value of its tab property or an element reference.
Signature	select(tab: string ｜ HTMLIonTabElement) => Promise<boolean>

Slots

Name	Description
``	Content is placed between the named slots if provided without a slot.
bottom	Content is placed at the bottom of the screen.
top	Content is placed at the top of the screen.