A11yTrap

Trap keyboard navigation within a component. A11yTrap makes it easy to add accessibility support for modals, dropdowns and other web components.

DEMO

Installation

With NPM:

npm install a11ytrap --save

With Bower:

bower install a11ytrap --save

Or include A11yTrap directly:

<script src="/path/to/a11ytrap.js"></script>

Usage

Import A11yTrap and configure a component (all options with default values are shown).

import A11yTrap from 'a11ytrap';

const MyComponent = new A11yTrap('.MyComponent', {
  enableArrowKeys: false,
  focusOnElement: null,
  focusOnFirstElement: false,
  focusOnLastElement: false,
});

MyComponent.init();

A11yTrap will now handle focus management for your component.

By default A11yTrap will include all focusable elements into it's focus management. To add a custom element into the trap add tabindex="0" or a11ytrap-element attribute to your element's markup.

Configuration options

enableArrowKeys

Type: Boolean Default: false

Usage: Allow arrow keys to navigate component.

focusOnElement

Type: Element Default: null

Usage: Begin focus management on a specific focusable element in component.

focusOnFirstElement

Type: Boolean Default: false

Usage: Begin focus management on first focusable element of component.

focusOnLastElement

Type: Boolean Default: false

Usage: Begin focus management on last focusable element of component.

Note: If more than one option is being used A11yTrap will default to focusOnFirstElement.

Methods

init()

Usage: Creates new instance of A11yTrap.

destroy()

Usage: Kills the instance of A11yTrap.

focusElement(index)

Usage: Focus on a element within component.

focusPrevious()

Usage: Focus on previous element.

focusNext()

Usage: Focus on next element.

Todo

• Add tests
• Properly handle series of radio inputs
• Fix issue when destroying and re-enabling A11yTrap
• Enable arrow key control
• Enable custom elements

License

MIT License