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jquery-accessible-nested-tabs.js
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jQuery(document).ready(function($) {
/*
* jQuery Accessible tab panel system, using ARIA - for nested tabs
* @version v1.5.3
* Website: https://a11y.nicolas-hoffmann.net/tabs/
* License MIT: https://github.com/nico3333fr/jquery-accessible-tabs-aria/blob/master/LICENSE
*/
// Store current URL hash.
var hash = window.location.hash.replace("#", "");
/* Tabs ------------------------------------------------------------------------------------------------------------ */
var $tabs = $(".js-tabs"),
$body = $("body");
if ($tabs.length) {
var $tab_list = $tabs.find(".js-tablist");
$tab_list.each(function() {
var $this_tab_list = $(this),
options = $this_tab_list.data(),
$tabs_prefix_classes = typeof options.tabsPrefixClass !== 'undefined' ? options.tabsPrefixClass + '-' : '',
$hx = typeof options.hx !== 'undefined' ? options.hx : '',
$existing_hx = typeof options.existingHx !== 'undefined' ? options.existingHx : '',
$this_tab_list_items = $this_tab_list.children(".js-tablist__item"),
$this_tab_list_links = $this_tab_list.find(".js-tablist__link");
// roles init
$this_tab_list.attr("role", "tablist"); // ul
$this_tab_list_items.attr("role", "presentation"); // li
$this_tab_list_links.attr("role", "tab"); // a
// classes init
$this_tab_list.addClass($tabs_prefix_classes + 'tabs__list');
$this_tab_list_items.addClass($tabs_prefix_classes + 'tabs__item');
$this_tab_list_links.addClass($tabs_prefix_classes + 'tabs__link');
// controls/tabindex attributes
$this_tab_list_links.each(function() {
var $this = $(this),
$hx_generated_class = typeof options.tabsGeneratedHxClass !== 'undefined' ? options.tabsGeneratedHxClass : 'invisible',
$href = $this.attr("href"),
$controls = $($href),
$text = $this.text();
if ($hx !== "") {
$controls.prepend('<' + $hx + ' class="' + $hx_generated_class + '" tabindex="0">' + $text + '</' + $hx + '>');
}
if ($existing_hx !== "") {
$controls.find($existing_hx + ':first-child').attr('tabindex', 0);
}
if (typeof $href !== "undefined" && $href !== "" && $href !== "#") {
$this.attr({
"aria-controls": $href.replace("#", ""),
"tabindex": -1,
"aria-selected": "false"
});
}
$this.removeAttr("href");
});
});
/* Tabs content ---------------------------------------------------------------------------------------------------- */
$(".js-tabcontent").attr({
"role": "tabpanel", // contents
"aria-hidden": "true" // all hidden
//"tabindex": 0
})
.each(function() {
var $this = $(this),
$this_id = $this.attr("id"),
$prefix_attribute = $("#label_" + $this_id).closest('.js-tablist').attr('data-tabs-prefix-class'),
$tabs_prefix_classes = typeof $prefix_attribute !== 'undefined' ? $prefix_attribute + '-' : '';
// label by link
$this.attr("aria-labelledby", "label_" + $this_id);
$this.addClass($tabs_prefix_classes + 'tabs__content');
});
// search if hash is ON not disabled tab
if (hash !== "" && $("#" + hash + ".js-tabcontent").length !== 0) {
if ($("#label_" + hash + ".js-tablist__link:not([aria-disabled='true'])").length) {
// display not disabled
$("#" + hash + ".js-tabcontent").removeAttr("aria-hidden");
// selection menu
$("#label_" + hash + ".js-tablist__link").attr({
"aria-selected": "true",
"tabindex": 0
});
}
}
// search if hash is IN not disabled tab
if (hash !== "" && $("#" + hash).parents('.js-tabcontent').length) {
var $this_hash = $("#" + hash),
$tab_content_parent = $this_hash.parents('.js-tabcontent'),
$tab_content_parent_id = $tab_content_parent.attr('id');
if ($("#label_" + $tab_content_parent_id + ".js-tablist__link:not([aria-disabled='true'])").length) {
$tab_content_parent.removeAttr("aria-hidden");
// selection menu
$("#label_" + $tab_content_parent_id + ".js-tablist__link").attr({
"aria-selected": "true",
"tabindex": 0
});
}
}
// search if data-selected="1" is on a not disabled tab for each tab system
$tabs.each(function() {
var $this = $(this),
$tab_selected = $this.find('.js-tablist__link[aria-selected="true"]'),
$tab_data_selected = $this.find('.js-tablist__link[data-selected="1"]:not([aria-disabled="true"]):first'),
$tab_data_selected_content = $('#' + $tab_data_selected.attr('aria-controls'));
if ($tab_selected.length === 0 && $tab_data_selected.length !== 0) {
$tab_data_selected.attr({
"aria-selected": "true",
"tabindex": 0
});
$tab_data_selected_content.removeAttr("aria-hidden");
}
});
// if no selected => select first not disabled
$tabs.each(function() {
var $this = $(this),
$tab_selected = $this.find('.js-tablist__link[aria-selected="true"]'),
$first_link = $this.find('.js-tablist__link:not([aria-disabled="true"]):first'),
$first_content = $('#' + $first_link.attr('aria-controls'));
if ($tab_selected.length === 0) {
$first_link.attr({
"aria-selected": "true",
"tabindex": 0
});
$first_content.removeAttr("aria-hidden");
}
});
/* Events ---------------------------------------------------------------------------------------------------------- */
/* click on a tab link */
$body.on("click", ".js-tablist__link[aria-disabled='true']", function() {
return false;
});
$body.on("click", ".js-tablist__link:not([aria-disabled='true'])", function(event) {
var $this = $(this),
$hash_to_update = $this.attr("aria-controls"),
$tab_content_linked = $("#" + $this.attr("aria-controls")),
$parent = $this.closest(".js-tabs"),
$all_tab_links = $parent.find("> .js-tablist > .js-tablist__item > .js-tablist__link"),
$all_tab_contents = $parent.find("> .js-tabcontent");
// aria selected false on all links
$all_tab_links.attr({
"tabindex": -1,
"aria-selected": "false"
});
// add aria selected on $this
$this.attr({
"aria-selected": "true",
"tabindex": 0
});
// add aria-hidden on all tabs contents
$all_tab_contents.attr("aria-hidden", "true");
// remove aria-hidden on tab linked
$tab_content_linked.removeAttr("aria-hidden");
// add fragment (timeout for transitions)
setTimeout(function() {
history.pushState(null, null, location.pathname + location.search + '#' + $hash_to_update)
}, 1000);
event.preventDefault();
})
/* Key down in tabs */
.on("keydown", ".js-tablist", function(event) {
var $parent = $(this).closest('.js-tabs'),
$activated = $parent.find('> .js-tablist > .js-tablist__item > .js-tablist__link[aria-selected="true"]').parent(),
$last_link = $parent.find('> .js-tablist > .js-tablist__item:last-child > .js-tablist__link'),
$first_link = $parent.find('> .js-tablist > .js-tablist__item:first-child > .js-tablist__link'),
$focus_on_tab_only = false,
$prev = $activated,
$next = $activated;
// search valid previous
do {
// if we are on first => activate last
if ($prev.is(".js-tablist__item:first-child")) {
$prev = $last_link.parent();
}
// else previous
else {
$prev = $prev.prev();
}
}
while ($prev.children('.js-tablist__link').attr('aria-disabled') === 'true' && $prev !== $activated);
// search valid next
do {
// if we are on last => activate first
if ($next.is(".js-tablist__item:last-child")) {
$next = $first_link.parent();
}
// else previous
else {
$next = $next.next();
}
}
while ($next.children('.js-tablist__link').attr('aria-disabled') === 'true' && $next !== $activated);
// some event should be activated only if the focus is on tabs (not on tabpanel)
if ($(document.activeElement).is($parent.find('.js-tablist__link'))) {
$focus_on_tab_only = true;
}
// catch keyboard event only if focus is on tab
if ($focus_on_tab_only && !event.ctrlKey) {
// strike up or left in the tab
if (event.keyCode == 37 || event.keyCode == 38) {
$prev.children(".js-tablist__link").click().focus();
event.preventDefault();
}
// strike down or right in the tab
else if (event.keyCode == 40 || event.keyCode == 39) {
$next.children(".js-tablist__link").click().focus();
event.preventDefault();
} else if (event.keyCode == 36) {
// activate first tab
$first_link.click().focus();
event.preventDefault();
} else if (event.keyCode == 35) {
// activate last tab
$last_link.click().focus();
event.preventDefault();
}
}
})
.on("keydown", ".js-tabcontent", function(event) {
var $this = $(this),
$selector_tab_to_focus = $this.attr('aria-labelledby'),
$tab_to_focus = $("#" + $selector_tab_to_focus),
$parent_item = $tab_to_focus.parent(),
$parent_list = $parent_item.parent(),
$first_item = $parent_list.find('.js-tablist__item:first-child'),
$last_item = $parent_list.find('.js-tablist__item:last-child'),
$prev_item = $parent_item,
$next_item = $parent_item;
// CTRL up/Left
if ((event.keyCode == 37 || event.keyCode == 38) && event.ctrlKey) {
$tab_to_focus.focus();
event.preventDefault();
}
// CTRL PageUp
if (event.keyCode == 33 && event.ctrlKey) {
//$tab_to_focus.focus();
// search valid previous
do {
// if we are on first => last
if ($prev_item.is(".js-tablist__item:first-child")) {
$prev_item = $last_item;
}
// else previous
else {
$prev_item = $prev_item.prev();
}
}
while ($prev_item.children('.js-tablist__link').attr('aria-disabled') === 'true' && $prev_item !== $parent_item);
$prev_item.children(".js-tablist__link").click().focus();
event.preventDefault();
}
// CTRL PageDown
if (event.keyCode == 34 && event.ctrlKey) {
$tab_to_focus.focus();
// search valid next
do {
// if we are on last => first
if ($next_item.is(".js-tablist__item:last-child")) {
$next_item = $first_item;
}
// else previous
else {
$next_item = $next_item.next();
}
}
while ($next_item.children('.js-tablist__link').attr('aria-disabled') === 'true' && $next_item !== $parent_item);
$next_item.children(".js-tablist__link").click().focus();
event.preventDefault();
}
})
/* click on a tab link */
.on("click", ".js-link-to-tab", function() {
var $this = $(this),
$tab_to_go = $($this.attr('href')),
$button_to_click = $('#' + $tab_to_go.attr('aria-labelledby'));
if ($button_to_click.attr('aria-disabled') !== 'true') {
// activate tabs
$button_to_click.click();
// give focus to the good button
setTimeout(function() {
$button_to_click.focus()
}, 10);
}
});
}
});