ion-tabs

Contents

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 url="/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. Here you only need to define tab which is the reference to the route.


<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>

Usage

<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="contacts"></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>

<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="contacts"></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>

import React from 'react';

import { IonTabs, IonTabBar, IonTabButton, IonIcon, IonLabel, IonBadge } from '@ionic/react';

const Example: React.SFC<{}> = () => (

  <IonTabs>
    <IonTabBar slot="bottom">
      <IonTabButton tab="schedule">
        <IonIcon name="calendar" />
        <IonLabel>Schedule</IonLabel>
        <IonBadge>6</IonBadge>
      </IonTabButton>

      <IonTabButton tab="speakers">
        <IonIcon name="contacts" />
        <IonLabel>Speakers</IonLabel>
      </IonTabButton>

      <IonTabButton tab="map">
        <IonIcon name="map" />
        <IonLabel>Map</IonLabel>
      </IonTabButton>

      <IonTabButton tab="about">
        <IonIcon name="information-circle" />
        <IonLabel>About</IonLabel>
      </IonTabButton>
    </IonTabBar>
  </IonTabs>
);

export default Example;

<template>
  <!-- Listen to before and after tab change events -->
  <ion-tabs @IonTabsWillChange="beforeTabChange" @IonTabsDidChange="afterTabChange">
    <ion-tab tab="schedule">
      <Schedule />
    </ion-tab>

    <!-- Match by "app.speakers" route name -->
    <ion-tab tab="speakers" :routes="'app.speakers'">
      <Speakers />
    </ion-tab>

    <!-- Match by an array of route names -->
    <ion-tab tab="map" :routes="['app.map', 'app.other.route']">
      <Map />
    </ion-tab>

    <!-- Get matched routes with a helper method -->
    <ion-tab tab="about" :routes="getMatchedRoutes">
      <About />
    </ion-tab>

    <!-- Use v-slot:bottom with Vue ^2.6.0 -->
    <template slot="bottom">
      <ion-tab-bar>
        <ion-tab-button tab="schedule">
          <ion-icon name="calendar"></ion-icon>
          <ion-label>Schedule</ion-label>
          <ion-badge>6</ion-badge>
        </ion-tab-button>

        <!-- Provide a custom route to navigate to -->
        <ion-tab-button tab="speakers" :to="{ name: 'app.speakers' }">
          <ion-icon name="contacts"></ion-icon>
          <ion-label>Speakers</ion-label>
        </ion-tab-button>

        <!-- Provide extra data to route -->
        <ion-tab-button tab="map" :to="{ name: 'app.map', params: { mode: 'dark' } }">
          <ion-icon name="map"></ion-icon>
          <ion-label>Map</ion-label>
        </ion-tab-button>

        <!-- Provide custom click handler -->
        <ion-tab-button tab="about" @click="goToAboutTab">
          <ion-icon name="information-circle"></ion-icon>
          <ion-label>About</ion-label>
        </ion-tab-button>
      </ion-tab-bar>
    </template>
  </ion-tabs>
</template>

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.