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jquery-accessible-modal-window-aria.js
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jquery-accessible-modal-window-aria.js
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jQuery(document).ready(function($) {
/*
* jQuery simple and accessible modal window, using ARIA
* @version v1.10.0
* Website: https://a11y.nicolas-hoffmann.net/modal/
* License MIT: https://github.com/nico3333fr/jquery-accessible-modal-window-aria/blob/master/LICENSE
*/
// loading modal ------------------------------------------------------------------------------------------------------------
// init
var $modals = $('.js-modal'),
$body = $('body');
$modals.each(function(index_to_expand) {
var $this = $(this),
index_lisible = index_to_expand + 1;
$this.attr({
'id': 'label_modal_' + index_lisible,
'aria-haspopup': 'dialog'
});
});
// jQuery formatted selector to search for focusable items
var focusableElementsString = "a[href], area[href], input:not([type='hidden']):not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, *[tabindex], *[contenteditable]";
if ($('#js-modal-page').length === 0) { // just to avoid missing #js-modal-page
$body.wrapInner('<div id="js-modal-page"></div>');
}
// events ------------------
$body.on('click', '.js-modal', function(event) {
var $this = $(this),
options = $this.data(),
$modal_starter_id = $this.attr('id'),
$modal_prefix_classes = typeof options.modalPrefixClass !== 'undefined' ? options.modalPrefixClass + '-' : '',
$modal_text = options.modalText || '',
modal_content_id = typeof options.modalContentId !== 'undefined' ? options.modalContentId : '',
$modal_content = typeof options.modalContentId !== 'undefined' ? $('#' + modal_content_id) : '',
$modal_title = options.modalTitle || '',
$modal_close_text = options.modalCloseText || 'Close',
$modal_close_title = options.modalCloseTitle || options.modalCloseText,
$modal_close_img = options.modalCloseImg || '',
$modal_background_click = options.modalBackgroundClick || '',
$modal_focus_id = options.modalFocusId || '',
$modal_aria = typeof options.modalAriaModal !== 'undefined' ? 'aria-modal="true"' : '',
$modal_role_alertdialog = typeof options.modalUseRoleAlertdialog !== 'undefined' ? 'role="alertdialog"' : '',
$modal_role_dialog = typeof options.modalRemoveRoleDialog !== 'undefined' || $modal_role_alertdialog === 'role="alertdialog"' ? '' : 'role="dialog"',
$modal_tag = typeof options.modalRemoveDialogTag !== 'undefined' ? 'div' : 'dialog',
$modal_code,
$modal_overlay,
$page = $('#js-modal-page');
// insert code at the end
$modal_code = '<' + $modal_tag + ' ' + $modal_role_dialog + ' ' + $modal_role_alertdialog + ' id="js-modal" class="' + $modal_prefix_classes + 'modal" aria-labelledby="modal-title" open ' + $modal_aria + '><div role="document" class="' + $modal_prefix_classes + 'modal__wrapper">';
$modal_code += '<button type="button" id="js-modal-close" class="' + $modal_prefix_classes + 'modal-close" data-content-back-id="' + modal_content_id + '" data-focus-back="' + $modal_starter_id + '" title="' + $modal_close_title + '">';
if ($modal_close_img !== '') {
$modal_code += '<img src="' + $modal_close_img + '" alt="' + $modal_close_text + '" class="' + $modal_prefix_classes + 'modal__closeimg" />';
} else {
$modal_code += '<span class="' + $modal_prefix_classes + 'modal-close__text">' + $modal_close_text + '</span>';
}
$modal_code += '</button>';
$modal_code += '<div class="' + $modal_prefix_classes + 'modal__content">';
if ($modal_title !== '') {
$modal_code += '<h1 id="modal-title" class="' + $modal_prefix_classes + 'modal-title">' + $modal_title + '</h1>';
}
if ($modal_text !== '') {
$modal_code += '<p>' + $modal_text + '</p>';
} else {
if (modal_content_id !== '' && $modal_content.length) {
//var $modal_content_id = $('#' + $modal_content_id);
$modal_code += '<div id="js-modal-content">';
$modal_code += $modal_content.html();
$modal_code += '</div>';
$modal_content.empty();
}
}
$modal_code += '</div></div></' + $modal_tag + '>';
$($modal_code).insertAfter($page);
$body.addClass('no-scroll');
$page.attr('aria-hidden', 'true');
// add overlay
if ($modal_background_click !== 'disabled') {
$modal_overlay = '<span id="js-modal-overlay" class="' + $modal_prefix_classes + 'modal-overlay" title="' + $modal_close_title + '" data-background-click="enabled"><span class="invisible">' + $modal_close_text + '</span></span>';
} else {
$modal_overlay = '<span id="js-modal-overlay" class="' + $modal_prefix_classes + 'modal-overlay" data-background-click="disabled"></span>';
}
$($modal_overlay).insertAfter($('#js-modal'));
if ($modal_focus_id !== '') {
$('#' + $modal_focus_id).focus();
} else {
$('#js-modal-close').focus();
}
event.preventDefault();
})
// close button and esc key
$body.on('click', '#js-modal-close', function() {
var $this = $(this),
$focus_back = '#' + $this.attr('data-focus-back'),
$content_back_id = $this.attr('data-content-back-id'),
$js_modal = $('#js-modal'),
$js_modal_content = $('#js-modal-content'),
$class_element = $js_modal.attr('class'),
$class_element_reverse = $class_element + '--reverse',
$js_modal_overlay = $('#js-modal-overlay'),
$page = $('#js-modal-page');
$page.removeAttr('aria-hidden');
var delay = $js_modal.css("animation-duration");
//alert(delay);
if (delay != '0s') {
var timeout = parseFloat(delay.replace('s', '')) * 1000;
timeout++;
$js_modal.removeClass($class_element);
setTimeout(function() {
$js_modal.addClass($class_element_reverse);
}, 1);
setTimeout(function() {
$body.removeClass('no-scroll');
$js_modal.remove();
$js_modal_overlay.remove();
if ($content_back_id !== '') {
$('#' + $content_back_id).html($js_modal_content.html());
}
$($focus_back).focus();
$js_modal.removeClass($class_element_reverse);
$js_modal.addClass($class_element);
}, timeout);
} else {
$body.removeClass('no-scroll');
$js_modal.remove();
$js_modal_overlay.remove();
if ($content_back_id !== '') {
$('#' + $content_back_id).html($js_modal_content.html());
}
$($focus_back).focus();
}
})
.on('click', '#js-modal-overlay', function(event) {
var $close = $('#js-modal-close');
event.preventDefault();
$close.trigger('click');
})
.on('click', '.js-modal-close', function(event) {
var $close = $('#js-modal-close');
event.preventDefault();
$close.trigger('click');
})
.on('keydown', '#js-modal-overlay', function(event) {
var $close = $('#js-modal-close');
if (event.keyCode == 13 || event.keyCode == 32) { // space or enter
event.preventDefault();
$close.trigger('click');
}
})
.on("keydown", "#js-modal", function(event) {
var $this = $(this),
$close = $('#js-modal-close');
if (event.keyCode == 27) { // esc
$close.trigger('click');
}
if (event.keyCode == 9) { // tab or maj+tab
// get list of all children elements in given object
var children = $this.find('*');
// get list of focusable items
var focusableItems = children.filter(focusableElementsString).filter(':visible');
// get currently focused item
var focusedItem = $(document.activeElement);
// get the number of focusable items
var numberOfFocusableItems = focusableItems.length;
var focusedItemIndex = focusableItems.index(focusedItem);
if (!event.shiftKey && (focusedItemIndex == numberOfFocusableItems - 1)) {
focusableItems.get(0).focus();
event.preventDefault();
}
if (event.shiftKey && focusedItemIndex == 0) {
focusableItems.get(numberOfFocusableItems - 1).focus();
event.preventDefault();
}
}
})
.on("keyup", ":not(#js-modal)", function(event) {
var $js_modal = $('#js-modal'),
focusedItem = $(document.activeElement),
in_jsmodal = focusedItem.parents('#js-modal').length ? true : false,
$close = $('#js-modal-close');
if ($js_modal.length && event.keyCode == 9 && in_jsmodal === false) { // tab or maj+tab
$close.focus();
}
})
.on('focus', '#js-modal-tabindex', function() {
var $close = $('#js-modal-close');
$close.focus();
});
});