Modal

Accessible modal dialog

Usage

Create a modal dialog and button(s) to toggle in HTML

<button class="js-modal-toggle">Open modal</button>
<div id="modal-1" class="js-modal modal" data-modal-toggle="js-modal-toggle" hidden>
    <div class="modal__inner" role="dialog" aria-labelledby="modal-label">
        <h2 id="modal-label">Modal title</h2>
        ...
        <button class="modal__close-btn js-modal-toggle" aria-label="close">
            <svg focusable="false" fill="#fff" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg">
                <path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/>
                <path d="M0 0h24v24H0z" fill="none"/>
            </svg>
        </button>
    </div>
</div>

Install the package

npm i -S @stormid/modal

Import the module

import modal from '@stormid/modal';

Initialise the module via selector string

const [ instance ] = modal('.js-modal');

Initialise with a DOM element

const element = document.querySelector('.js-modal');
const [ instance ] = modal(element);

Initialise with a Node list

const elements = document.querySelectorAll('.js-modal');
const [ instance ] = modal(elements);

Initialise with an Array of elements

const elements = [].slice.call(document.querySelectorAll('.js-modal'));
const [ instance ] = modal(elements);

CSS The className 'is--modal' added to the document.body when the modal is open. This can be used to prevent the body from scrolling

.is--modal {
    overflow: hidden;
}

Options

Options can be set during initialising in an Object passed as the second argument to the modal function, e.g. modal('.js-modal', { startOpen: true }), or as data-attributes on the modal element (the element passed to the modal function), e.g. data-start-open="true"

{
    onClassName: 'is--active', //className added to node when modal is open
    toggleSelectorAttribute: 'data-modal-toggle', //attribute on node to use as toggle selector
    callback: false, //optional function called after modal state change
    delay: 0, //ms delay before focus on first focuable element
    startOpen //boolean, to trigger modal to open when initialised    
}

API

modal() returns an array of instances. Each instance exposes the interface

{
    getState, a Function that returns the current state Object
    open, a Function that opens the modal
    close a Function that closes the modal
}

Tests

npm t

License

MIT