a11y-focus-scope

Accessibility util for scoping focus to an element.

Installation

$ npm install --save a11y-focus-scope

Usage

import {scopeFocus, unscopeFocus} from 'a11y-focus-scope';
 
document.body.innerHTML = `
  <button id="outer-button">Outer Button</button>
 
  <div id="container">
    <button id="inner-button">Inner Button</button>
  </div>
`;
 
var container = document.getElementById('container');
var innerButton = document.getElementById('inner-button');
var outerButton = document.getElementById('outer-button');
 
scopeFocus(container);
// document.activeElement === container;
 
innerButton.focus();
// document.activeElement === innerButton;
 
outerButton.focus();
// document.activeElement === container;
 
unscopeFocus();
outerButton.focus();
// document.activeElement === outerButton;