The Tabbar

In Onsen UI tab navigation is enabled using the <ons-tabbar> element.

Tabs are added using <ons-tab> which is a child of <ons-tabbar>:

<ons-tabbar>
  <ons-tab label="Tab 1" active></ons-tab>
  <ons-tab label="Tab 2"></ons-tab>
</ons-tabbar>

The active attribute is used to define the tab which should be open by default. If this attribute is not provided, the first page will be activated by default.

The tab element

A tab accepts multiple attriutes to change its style and behavior, i.e. page, label or icon.

Alternatively, the content can be directly provided as ons-tab children:

<ons-tab page="...">
  <input type="radio" style="display: none">
  <button class="tabbar__button">
    <div class="tabbar__icon">
      <ons-icon icon="my-icon"></ons-icon>
    </div>
    <div class="tabbar__label">My Label</div>
    <div class="tabbar__badge notification">99</div>
  </button>
</ons-tab>

Every tab has, by default, the same width. 50% with two tabs, 25% with four tabs and so on. To allow tabs grow depending on their content (i.e. shorter/ longer labels), use the autogrow modifier. Optionally, max-width CSS property can be specified to set the width of the tab (for each tab).

Adding pages

Binding pages to the tabs works very similar to the <ons-navigator>.

The content of the pages is defined using a <template> element:

<template id="tab1.html">
  <ons-page>
    ...
  </ons-page>
</template>

and in order to bind a template to a specific tab the page attribute is used on the <ons-tab> element:

<ons-tab
  label="Tab 1"
  page="tab1.html">
</ons-tab>

Swipes and Animations

By default, the tab bar will slide from one page to another on tab click. Use animation="none" attribute to have an instant change.

swipeable attribute can be used to enable this functionality. It can be toggled to allow or prevent swipes at different moments of the app.

These attributes can be combined to have a tab bar with instant changes that can also be swiped:

<ons-tabbar swipeable animation="none">...</ons-tabbar>

For iOS, tab-border attribute can be included to show a tab border that updates position during swipe (this is always default on Android).