README.md

@19h47/tabs

Tabulation partout, tabulation nulle part

Installation

yarn add @19h47/tabs

Usage

import Tabs from '@19h47/tabs';

const $element = document.querySelector('.js-tabs');
const tabs = new Tabs($element);

tabs.init();

Tablist

The element that serves as a container for the set of tabs. The role="tablist" attribute is required.
The aria-label="" attribute provides a label that describes the purpose of the set of tabs.

<ul role="tablist" aria-label="navigation">
	<li>
		<button
			type="button"
			class="is-active"
			role="tab"
			aria-selected="true"
			aria-controls="home-tab"
			id="home"
		>
			Home
		</button>
	</li>
	<li>
		<button
			type="button"
			role="tab"
			aria-selected="false"
			aria-controls="project-tab"
			id="project"
			tabindex="-1"
		>
			Project
		</button>
	</li>
	<li>
		<button
			type="button"
			role="tab"
			aria-selected="false"
			aria-controls="contact-tab"
			id="contact"
			tabindex="-1"
			data-deletable=""
		>
			Contact
		</button>
	</li>
</ul>

Tab

An element in the tab list that serves as a label for one of the tab panels and can be activated to display that panel.

<button
	type="button"
	role="tab"
	aria-selected="false"
	aria-controls="foo-tab"
	id="foo"
	tabindex="-1"
>
	Project
</button>

The role="tab" attribute is required.

The aria-controls="foo-tab" refers to the id of the tabpanel element associated with the tab.

Since an HTML button element is used for the tab, it is not necessary to set tabindex="0" on the selected (active) tab element.

Is the tabulation deletable ? You can set up this option by adding the data-deletable attribute on button.

To active the button on first load, add a is-active class to the button, remove the tabindex attribute and switch to true the aria-selected attribute.

Tabpanel

The element that contains the content associated with a tab.

<section tabindex="0" role="tabpanel" aria-labelledby="foo" id="foo-tab">
	<p>
		Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nihil hic, vero. Fugiat voluptas
		ex consequatur hic nemo officia iure placeat non, pariatur, dolore natus nobis, tempore
		dolores dicta nisi inventore.
	</p>
</section>

To active panel on first load, add a is-active class to it.

Keyboard support

Key	Function
Tab	When focus moves into the tab list, places focus on the active tab element When the tab list contains the focus, moves focus to the next element in the tab sequence, which is the tabpanel element.
Enter Space	When a tab has focus, activates the tab, causing its associated panel to be displayed.
Right Arrow	When a tab has focus: Moves focus to the next tab. If focus is on the last tab, moves focus to the first tab.
Left Arrow	When a tab has focus: Moves focus to the previous tab. If focus is on the first tab, moves focus to the last tab.
Home fn + left arrow	When a tab has focus, moves focus to the first tab.
End fn + right arrow	When a tab has focus, moves focus to the last tab.
Delete	When focus is on the Contact tab, removes the tab from the tab list and places focus on the previous tab.

Options

Option	Type	Default	Description
delay	integer	0	Determine whether there should be a delay when user navigates with the arrow keys
hash	boolean	true
callback	function	() => {}	A callback fired right before Tab.activate event. Useful for animation or to fetch data for instance. Don't use arrow function if you need to access this.

import Tabs from '@19h47/tabs';

const $element = document.querySelector('.js-tabs');
const tabs = new Tabs($el, {
	callback() {
		return new Promise(resolve => {
			// animate, fetch data, use this, do your stuff, etc.
			resolve();
		});
	},
});

tabs.init();

Events

Event	Arguments	Description
Tab.activate	event	Detail object containing current controls id, and current DOM element
Tab.delete	event	Detail object containing current controls id, and current DOM element

import Tabs from '@19h47/tabs';

const $element = document.querySelector('.js-tabs');
const tabs = new Tabs($element);

tabs.init();

tabs.tabs.forEach($tab => {
	$tab.el.addEventListener('Tab.activate', ({ detail }) => {
		const { controls, element } = detail;
		console.log(controls, element);
	});
	$tab.el.addEventListener('Tab.delete', ({ detail }) => {
		const { controls, element } = detail;
		console.log(controls, element);
	});
});

Methods

Method
destroy()	Destroy
init()	Create
create()	Create

Build Setup

# install dependencies
$ yarn install

# serve with hot reload at localhost:3000
$ yarn start

# build for production
$ yarn prod

Example

An example is located right here, see sources.

Acknowledgments

• Deciding When to Make Selection Automatically Follow Focus
• Example of Tabs with Manual Activation
• Example of Tabs with Automatic Activation
• Keycode by Wes Bos