@financial-times/o-tabs
v8.1.4
Published
Tabs component for dividing content into meaningful sections.
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2,557
Readme
o-tabs
Tabs component for dividing content into meaningful sections.
Usage
Check out how to include Origami components in your project to get started with o-tabs
.
Markup
The tablist, tabs and tabpanels must be identified by ARIA role
attributes.
The tab elements must contain a link whose href
attribute points to the ID of a tabpanel element.
The tabpanel elements must have a o-tabs__tabpanel
class added to them.
This is an example of an HTML structure that o-tabs will accept:
<div data-o-component="o-tabs" class="o-tabs o-tabs--buttontabs o-tabs--secondary" role="tablist">
<a role="tab" aria-controls="tabContent1" href="#tabContent1" >Tab 1</a>
<a role="tab" aria-controls="tabContent2" href="#tabContent2">Tab 2</a>
<a role="tab" aria-controls="tabContent3" href="#tabContent3">Tab 3</a>
</div>
<div id="tabContent1" class="o-tabs__tabpanel">
Tab content 1
</div>
<div id="tabContent2" class="o-tabs__tabpanel">
Tab content 2
</div>
<div id="tabContent3" class="o-tabs__tabpanel">
<div>
Note: first elements of each tab will get focused when it is selected. In this case, this div will receive focus.
</div>
Tab content 3
</div>
To set the initially selected tab, add an aria-selected="true"
attribute to a tab element, otherwise the first tab will be selected automatically.
Config
You can set config options declaratively by using [data-o-tabs-]
prefixed data attributes.
Options consist of:
data-o-tabs-update-url="true"
- update the URL with the#
of the selected panel.
Core experience
Without the accompanying JavaScript, the tabs will receive no styling, and all tabpanels will remain visible. It's recommended that the default styling is to have each of the tabpanels displayed one below the other.
A product may choose to hide the tabs like this:
.o-tabs { display: none; }
.o-tabs--js { display: block; }
ARIA
ARIA attributes will be set on elements as follows:
On init, aria-controls
is added to each tab element, with value being the ID of the associated tabpanel.
On init and selected tab change these attributes are set and updated as appropriate:
aria-selected
is set on the tab elementsaria-hidden
andaria-expanded
are set on the tabpanels
These state attributes are used by the o-tabs CSS.
JavaScript
Declarative
A o.DOMContentLoaded
event can be dispatched on the document
to auto-construct a o-tabs object for each element with a data-o-component="o-tabs"
attribute:
document.addEventListener("DOMContentLoaded", function() {
document.dispatchEvent(new CustomEvent('o.DOMContentLoaded'));
});
Auto-construction can be disabled for a specific element via another data attribute (data-o-tabs-autoconstruct="false"
).
Note that for browsers that do not support DOMContentLoaded
(IE8 etc), the event could be polyfilled, or construction can be manually invoked:
import Tabs from '@financial-times/o-tabs';
const tabsObjects = Tabs.init(document.body);
An array of any constructed Tabs objects will be returned.
Tabs.init(config)
will not create Tabs objects for elements that already have Tabs objects constructed on them, therefore it's safe to call more than once on the same page region.
Imperative
import Tabs from '@financial-times/o-tabs';
const myTabs = new Tabs(document.getElementById('myTabsRootElement'), {
});
Events
The following events will be dispatched on the Tabs' root DOM element:
oTabs.ready
: The Tabs object has initialised. Event detail:tabs
: The o-tabs object.
oTabs.tabSelect
: A tab has been selected. Event detail:tabs
: The o-tabs object.selected
: The index of the selected tab.lastSelected
: The index of the last selected tab.
API
Tabs are indexed starting from 0.
The following API methods are provided:
init(config)
: Set attributes/classes, bind events. Called automatically on construction. Does nothing if already been called.config
object accepts:selectTab(idx)
: Select tabidx
. Does nothing if tabidx
does not exist or is already selected.destroy()
: Unbind events, removeo-tabs--js
class. After calling this,init()
can be called again to re-initialise the tabs.
Sass
o-tabs comes with either base styling, which should be used as a base for you to add your own styling. Or full styling called buttontabs; based on the buttons from o-buttons).
To apply the buttontabs styling, add a o-tabs--buttontabs
class to the root element:
<ul data-o-component="o-tabs" class="o-tabs o-tabs--buttontabs" role="tablist">
The buttontabs style comes in two sizes that conform to the o-buttons
sizes: medium and big. Medium is the default size and big can be applied by adding the class o-tabs--big
.
Options
- Align right: Add
o-tabs--alignright
to the root element.
Mixin: oTabs
Output all default oTabs
styles using oTabs
.
@include oTabs();
Set oTabs
options to output more sizes and variations of button tabs (types and themes of buttons from o-buttons).
@include oTabs($opts: (
'sizes': ('big'), //.o-tabs--big
'button-tabs': (
('type': 'primary'), //.o-tabs--primary
('type': 'secondary'), //.o-tabs--secondary
('type': 'secondary', 'theme': 'inverse'), //.o-tabs--secondary.o-tabs--inverse
)
));
Sizes
This table outlines all of the possible sizes you can request in the oTabs
mixin:
| Size | Notes | Brand support | |------|---------------------|------------------------------| | big | Included by default | core, internal, whitelabel |
Types
This table outlines the button types you can request in the oTabs
mixin. All of these are types from o-buttons:
| Type | Notes | Brand support | |-----------|------------------------------------------|------------------------------| | secondary | Included by default | core, internal, whitelabel | | primary | Included by default | core, internal, whitelabel |
Themes
This table outlines some of the possible button themes you can request in the oTabs
mixin along with button types. All of these are themes from o-buttons:
| Theme | Notes | Brand support | |-----------|------------------------------------------|------------------------------| | inverse | Included by default | core, internal | | mono | Not included by default | core, internal | | b2c | Not included by default | core |
Keyboard Support
When focus is within the tab list
Key|Function ---|--- Tab | When focus moves into the tab list, places focus on the active tab element. When the tab list already contains the focus, moves focus to the next element in the page tab sequence outside the tablist. Left Arrow | Moves focus to the previous tab. If focus is on the first tab, moves focus to the last tab. Activates the tabpanel which is associated with the newly focused tab. Right Arrow | Moves focus to the next tab. If focus is on the last tab element, moves focus to the first tab. Activates the tabpanel which is associated with the newly focused tab. Space or Enter | Activates the tabpanel which is associated with the focused tab if it was not already activated.
Migration Guide
| State | Major Version | Last Minor Release | Migration guide | | :---: | :---: | :---: | :---: | | ✨ active | 6 | N/A | migrate to v7 | | ⚠ maintained | 6 | 6.2 | migrate to v6 | | ⚠ maintained | 5 | 5.0 | migrate to v5 | | ⚠ maintained | 4 | 4.3 | migrate to v4 | | ╳ deprecated | 3 | 3.0 | N/A | | ╳ deprecated | 2 | 2.2 | N/A | | ╳ deprecated | 1 | 1.0 | N/A |
Contact
If you have any questions or comments about this component, or need help using it, please either raise an issue, visit #origami-support or email Origami Support.
Licence
This software is published by the Financial Times under the MIT licence.