Certain ARIA roles must contain particular children

https://dequeuniversity.com/rules/axe/4.3/aria-required-children

In order to make this work, I had to translate Bulma's style so it doesn't use `ul` and `li` anymore.

The JS code had to be adapted, I also changed `button` to `tab` (seemed like a more relevant name) and added a `scrollIntoView()` on load the active tab is always visible.
This commit is contained in:
Joachim 2022-02-12 16:14:35 +01:00
parent bbb89605a5
commit b27b6a5980
4 changed files with 238 additions and 93 deletions

View file

@ -301,6 +301,159 @@ details.dropdown .dropdown-menu a:focus-visible {
}
}
/** Bookwyrm Tabs
******************************************************************************/
.bw-tabs {
-webkit-overflow-scrolling:touch;
-webkit-touch-callout:none;
position: relative;
align-items:center;
display:flex;
font-size:1rem;
justify-content:flex-start;
overflow-x:auto;
overflow-y:hidden;
user-select:none;
white-space:nowrap
}
.bw-tabs::before {
border-bottom-color:#dbdbdb;
border-bottom-style:solid;
border-bottom-width:1px;
bottom: 0;
content:"";
position: absolute;
width: 100%;
}
.bw-tabs:not(:last-child) {
margin-bottom:1.5rem
}
.bw-tabs a {
align-items:center;
border-bottom-color:#dbdbdb;
border-bottom-style:solid;
border-bottom-width:1px;
color:#4a4a4a;
display:flex;
justify-content:center;
margin-bottom:-1px;
padding:.5em 1em;
position: relative;
}
.bw-tabs a:hover {
border-bottom-color:transparent;
color:#363636
}
.bw-tabs a.is-active {
border-bottom-color:transparent;
color:#3273dc
}
.bw-tabs.is-left {
padding-right:.75em
}
.bw-tabs.is-center {
flex:none;
justify-content:center;
padding-left:.75em;
padding-right:.75em
}
.bw-tabs.is-right {
justify-content:flex-end;
padding-left:.75em
}
.bw-tabs .icon:first-child {
margin-right:.5em
}
.bw-tabs .icon:last-child {
margin-left:.5em
}
.bw-tabs.is-centered {
justify-content:center
}
.bw-tabs.is-right {
justify-content:flex-end
}
.bw-tabs.is-boxed a {
border:1px solid transparent;
border-radius:4px 4px 0 0
}
.bw-tabs.is-boxed a:hover {
background-color:#f5f5f5;
border-bottom-color:#dbdbdb
}
.bw-tabs.is-boxed a.is-active {
background-color:#fff;
border-color:#dbdbdb;
border-bottom-color:#fff!important
}
.bw-tabs.is-fullwidth a {
flex-grow:1;
flex-shrink:0
}
.bw-tabs.is-toggle a {
border-color:#dbdbdb;
border-style:solid;
border-width:1px;
margin-bottom:0;
position:relative
}
.bw-tabs.is-toggle a:hover {
background-color:#f5f5f5;
border-color:#b5b5b5;
z-index:2
}
.bw-tabs.is-toggle a+a {
margin-left:-1px
}
.bw-tabs.is-toggle a:first-child {
border-top-left-radius:4px;
border-bottom-left-radius:4px
}
.bw-tabs.is-toggle a:last-child {
border-top-right-radius:4px;
border-bottom-right-radius:4px
}
.bw-tabs.is-toggle a.is-active {
background-color:#3273dc;
border-color:#3273dc;
color:#fff;
z-index:1
}
.bw-tabs.is-toggle {
border-bottom:none
}
.bw-tabs.is-toggle.is-toggle-rounded a:first-child {
border-bottom-left-radius:290486px;
border-top-left-radius:290486px;
padding-left:1.25em
}
.bw-tabs.is-toggle.is-toggle-rounded a:last-child {
border-bottom-right-radius:290486px;
border-top-right-radius:290486px;
padding-right:1.25em
}
.bw-tabs.is-small {
font-size:.75rem
}
.bw-tabs.is-medium {
font-size:1.25rem
}
.bw-tabs.is-large {
font-size:1.5rem
}
.bw-tabs.has-aside-text a {
margin-top: 1.5rem;
}
.bw-tabs a .aside-text {
position: absolute;
top: calc(-.75rem - .75rem);
left: 0;
color: #4a4a4a;
}
/** Details panel
******************************************************************************/

View file

@ -11,17 +11,17 @@ class TabGroup {
this.container = container;
this.tablist = this.container.querySelector('[role="tablist"]');
this.buttons = this.tablist.querySelectorAll('[role="tab"]');
this.tabs = this.tablist.querySelectorAll('[role="tab"]');
this.panels = this.container.querySelectorAll(':scope > [role="tabpanel"]');
this.delay = this.determineDelay();
if(!this.tablist || !this.buttons.length || !this.panels.length) {
if(!this.tablist || !this.tabs.length || !this.panels.length) {
return;
}
this.keys = this.keys();
this.direction = this.direction();
this.initButtons();
this.initTabs();
this.initPanels();
}
@ -46,17 +46,21 @@ class TabGroup {
};
}
initButtons() {
initTabs() {
let count = 0;
for(let button of this.buttons) {
let isSelected = button.getAttribute("aria-selected") === "true";
button.setAttribute("tabindex", isSelected ? "0" : "-1");
for(let tab of this.tabs) {
let isSelected = tab.getAttribute("aria-selected") === "true";
tab.setAttribute("tabindex", isSelected ? "0" : "-1");
button.addEventListener('click', this.clickEventListener.bind(this));
button.addEventListener('keydown', this.keydownEventListener.bind(this));
button.addEventListener('keyup', this.keyupEventListener.bind(this));
tab.addEventListener('click', this.clickEventListener.bind(this));
tab.addEventListener('keydown', this.keydownEventListener.bind(this));
tab.addEventListener('keyup', this.keyupEventListener.bind(this));
button.index = count++;
if (isSelected) {
tab.scrollIntoView();
}
tab.index = count++;
}
}
@ -73,11 +77,11 @@ class TabGroup {
}
clickEventListener(event) {
let button = event.target.closest('a');
let tab = event.target.closest('[role="tab"]');
event.preventDefault();
this.activateTab(button, false);
this.activateTab(tab, false);
}
// Handle keydown on tabs
@ -88,12 +92,12 @@ class TabGroup {
case this.keys.end:
event.preventDefault();
// Activate last tab
this.activateTab(this.buttons[this.buttons.length - 1]);
this.activateTab(this.tabs[this.tabs.length - 1]);
break;
case this.keys.home:
event.preventDefault();
// Activate first tab
this.activateTab(this.buttons[0]);
this.activateTab(this.tabs[0]);
break;
// Up and down are in keydown
@ -147,15 +151,15 @@ class TabGroup {
switchTabOnArrowPress(event) {
var pressed = event.keyCode;
for (let button of this.buttons) {
button.addEventListener('focus', this.focusEventHandler.bind(this));
for (let tab of this.tabs) {
tab.addEventListener('focus', this.focusEventHandler.bind(this));
}
if (this.direction[pressed]) {
var target = event.target;
if (target.index !== undefined) {
if (this.buttons[target.index + this.direction[pressed]]) {
this.buttons[target.index + this.direction[pressed]].focus();
if (this.tabs[target.index + this.direction[pressed]]) {
this.tabs[target.index + this.direction[pressed]].focus();
}
else if (pressed === this.keys.left || pressed === this.keys.up) {
this.focusLastTab();
@ -184,8 +188,8 @@ class TabGroup {
// Set the tab as selected
tab.setAttribute('aria-selected', 'true');
// Give the tab parent an is-active class
tab.parentNode.classList.add('is-active');
// Give the tab is-active class
tab.classList.add('is-active');
// Get the value of aria-controls (which is an ID)
var controls = tab.getAttribute('aria-controls');
@ -201,11 +205,11 @@ class TabGroup {
// Deactivate all tabs and tab panels
deactivateTabs() {
for (let button of this.buttons) {
button.parentNode.classList.remove('is-active');
button.setAttribute('tabindex', '-1');
button.setAttribute('aria-selected', 'false');
button.removeEventListener('focus', this.focusEventHandler.bind(this));
for (let tab of this.tabs) {
tab.classList.remove('is-active');
tab.setAttribute('tabindex', '-1');
tab.setAttribute('aria-selected', 'false');
tab.removeEventListener('focus', this.focusEventHandler.bind(this));
}
for (let panel of this.panels) {
@ -214,11 +218,11 @@ class TabGroup {
}
focusFirstTab() {
this.buttons[0].focus();
this.tabs[0].focus();
}
focusLastTab() {
this.buttons[this.buttons.length - 1].focus();
this.tabs[this.tabs.length - 1].focus();
}
// Determine whether there should be a delay

View file

@ -9,37 +9,30 @@
{% else %}
{% with active_book=request.GET.book %}
<div class="tab-group">
<div class="tabs is-small">
<ul role="tablist">
{% for shelf in suggested_books %}
{% if shelf.books %}
{% with shelf_counter=forloop.counter %}
<li>
<p>
<div class="bw-tabs is-small is-toggle has-aside-text" role="tablist">
{% for shelf in suggested_books %}
{% if shelf.books %}
{% with shelf_counter=forloop.counter %}
{% for book in shelf.books %}
<a
class="{% if active_book == book.id|stringformat:'d' %}is-active{% elif not active_book and shelf_counter == 1 and forloop.first %}is-active{% endif %}"
href="{{ request.path }}?book={{ book.id }}"
id="tab_book_{{ book.id }}"
role="tab"
aria-label="{{ book.title }}"
aria-selected="{% if active_book == book.id|stringformat:'d' %}true{% elif not active_book and shelf_counter == 1 and forloop.first %}true{% else %}false{% endif %}"
aria-controls="book_{{ book.id }}">
{% if forloop.first %}
<span class="aside-text">
{% include "snippets/translated_shelf_name.html" with shelf=shelf %}
</p>
<div class="tabs is-small is-toggle">
<ul>
{% for book in shelf.books %}
<li class="{% if active_book == book.id|stringformat:'d' %}is-active{% elif not active_book and shelf_counter == 1 and forloop.first %}is-active{% endif %}">
<a
href="{{ request.path }}?book={{ book.id }}"
id="tab_book_{{ book.id }}"
role="tab"
aria-label="{{ book.title }}"
aria-selected="{% if active_book == book.id|stringformat:'d' %}true{% elif shelf_counter == 1 and forloop.first %}true{% else %}false{% endif %}"
aria-controls="book_{{ book.id }}">
{% include 'snippets/book_cover.html' with book=book cover_class='is-h-m' %}
</a>
</li>
{% endfor %}
</ul>
</div>
</li>
{% endwith %}
{% endif %}
</span>
{% endif %}
{% include 'snippets/book_cover.html' with book=book cover_class='is-h-m' %}
</a>
{% endfor %}
</ul>
{% endwith %}
{% endif %}
{% endfor %}
</div>
{% for shelf in suggested_books %}
{% with shelf_counter=forloop.counter %}

View file

@ -4,42 +4,37 @@
{% with status_type=request.GET.status_type %}
<div class="tab-group">
<div class="tabs is-boxed" role="tablist">
<ul>
<li class="{% if status_type == 'review' or not status_type %}is-active{% endif %}">
<a
href="{{ request.path }}?status_type=review&book={{ book.id }}"
id="tab_review_{{ book.id }}"
role="tab"
aria-selected="{% if status_type == 'review' or not status_type %}true{% else %}false{% endif %}"
aria-controls="review_{{ book.id }}"
data-category="tab-option-{{ book.id }}">
{% trans "Review" %}
</a>
</li>
<li class="{% if status_type == 'comment' %}is-active{% endif %}">
<a
href="{{ request.path }}?status_type=comment&book={{ book.id}}"
id="tab_comment_{{ book.id }}"
role="tab"
aria-selected="{% if status_type == 'comment' %}true{% else %}false{% endif %}"
aria-controls="comment_{{ book.id}}"
data-category="tab-option-{{ book.id }}">
{% trans "Comment" %}
</a>
</li>
<li class="{% if status_type == 'quote' %}is-active{% endif %}">
<a
href="{{ request.path }}?status_type=quote&book={{ book.id }}"
id="tab_quote_{{ book.id }}"
role="tab"
aria-selected="{% if status_type == 'quote' %}true{% else %}false{% endif %}"
aria-controls="quote_{{ book.id }}"
data-category="tab-option-{{ book.id }}">
{% trans "Quote" %}
</a>
</li>
</ul>
<div class="bw-tabs is-boxed" role="tablist">
<a
class="{% if status_type == 'review' or not status_type %}is-active{% endif %}"
role="tab"
href="{{ request.path }}?status_type=review&book={{ book.id }}"
id="tab_review_{{ book.id }}"
aria-selected="{% if status_type == 'review' or not status_type %}true{% else %}false{% endif %}"
aria-controls="review_{{ book.id }}"
data-category="tab-option-{{ book.id }}">
{% trans "Review" %}
</a>
<a
class="{% if status_type == 'comment' %}is-active{% endif %}"
role="tab"
href="{{ request.path }}?status_type=comment&book={{ book.id}}"
id="tab_comment_{{ book.id }}"
aria-selected="{% if status_type == 'comment' %}true{% else %}false{% endif %}"
aria-controls="comment_{{ book.id}}"
data-category="tab-option-{{ book.id }}">
{% trans "Comment" %}
</a>
<a
class="{% if status_type == 'quote' %}is-active{% endif %}"
role="tab"
href="{{ request.path }}?status_type=quote&book={{ book.id }}"
id="tab_quote_{{ book.id }}"
aria-selected="{% if status_type == 'quote' %}true{% else %}false{% endif %}"
aria-controls="quote_{{ book.id }}"
data-category="tab-option-{{ book.id }}">
{% trans "Quote" %}
</a>
</div>
<div class="tab-option-{{ book.id }}" id="review_{{ book.id }}" role="tabpanel" aria-labelledby="tab_review_{{ book.id }}" {% if status_type and status_type != "review" %}hidden{% endif %}>