cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <h1><a href="http://websemantics.uk/articles/accessible-tab-navigation/">Accessible tab navigation to meet <abbr title="Web Content Accessibility Guidelines">WCAG</abbr> 2 using <abbr title="Accessible Rich Internet Applications">ARIA</abbr> roles</a></h1>

<p>Use the <kbd>Tab</kbd> key to jump link to visible link, and the arrow keys to navigate across the tabs.</p>
<p>A <strong>white focus outline</strong> is applied as an aid to visualisation but it is <strong>not</strong> a requirement.</p>

<div class=tl_container>

  <!-- A plain set of anchor links in HTML -->

  <ul class="tl_list">
    <li><a href="#A" class=a>Section A</a></li>
    <li><a href="#B" class="b ON">Section B</a></li>
    <li><a href="#C" class=c>Section C</a></li>
  </ul>

  <section id=A class="tl_section a">
    <h2>Content heading A</h2>
    <p>Copy with an <a href="#">Example focusable link</a> as content for A1.</p>
  </section>

  <section id=B class="tl_section b">
    <h2>Content heading B</h2>
    <p>Copy with an <a href="#">Example focusable link</a> as content for B1.</p>
  </section>

  <section id=C class="tl_section c">
    <h2>Content heading C</h2>
    <p>Copy without a focusable link as content for C1.</p>

    <!-- A second embedded tablist example -->
    <ul class="tl_list">
      <li><a href=#D class=d>Sub-section D</a></li>
      <li><a href=#E class="tl_lnk-on e">Sub-section E</a></li>
    </ul>

    <div id=D class="tl_section d">
      <h2>Content heading D</h2>
      <p>Copy without a focusable link as content for D.</p>
    </div>

    <div id=E class="tl_section e">
      <h2>Content heading E</h2>
      <p>Copy without a focusable link as content for E.</p>
    </div>
  </section>

</div>

  <p>Updated (19-03-2017) to include up / down arrow keys and nested tablists.</p>

  <p>Available as a Github repo: <a href="https://github.com/2kool2/accessible-tabs" target=_blank title="[new window]">Accessible tabs</a>.</p>

 <p>There's an option to allow mouse hover to activate a tab by adding the class "hoverable" to the  tablist <code>ul</code>. Not so sure it's a good idea though.</p>

<!-- <p>As used on the <a href="http://www.tesco.com/easter/" target=_blank title="[new window]">Tesco Easter 2016 hub</a> (Opening hours results). <a href="http://websemantics.uk/tesco/easter.2016/" target=_blank title="[new window]">Permanent copy</a></p> -->

<p id=addToggle></p>

<h2>Alternatively</h2>

<p>The method provided here is a furtherence of Heydon Pickering's <a href="http://heydonworks.com/practical_aria_examples/#tab-interface">Tab interface</a>.</p>

<p>Please read and consider Thierry Koblentz's article: <a href="http://cssmojo.com/tab-panel-the-right-way/?mc_cid=29c24aed5b&mc_eid=278af32c16#visual-clutter-started-it-all">Tab Panel, the right way&hellip;</a> which doesn't use anchors as tab activators. Pankaj Parashar has a supporting CodePen <a href="https://codepen.io/pankajparashar/pen/oJEAF">Awesome Accessible Tabpanel</a>.</p>

<p>Jeff Smith's article: <a href="https://simplyaccessible.com/article/danger-aria-tabs/">Danger! ARIA tabs</a> has good arguments, though I'm not completely sold on the suggested solution: <a href="https://codepen.io/jeffsmith/pen/mPByya/">Standard tabs without ARIA roles </a>.</p>


<p class=smaller><a target=_blank title="[new window]" href="https://codepen.io/2kool2/pens/public/?grid_type=list#">Pens by Mike Foskett</a> &mdash; <a target=_blank title="[new window]" href="https://websemantics.uk/">webSemantics</a></p>
            
          
!
            
              /* Tab styling (optional) */

.tl_container {margin: 2rem 0;}

.tl_list {
  display: flex;
  padding: 0;
  margin: 0;
  align-items: center;
  justify-content: left;
  list-style: none;
}

.tl_list li {
  margin: 0;
  width: 33.3333%;
  text-align: center;
  border-radius: 4px 4px 0 0;
}

.tl_list a {
  color: #fff;
  padding: 1rem 0.5rem;
  display: block;
  border: none;
  text-decoration: none;
  text-shadow: none;
}
.tl_list a:hover,
.tl_list a:focus {
  text-shadow: 0 2px 4px #000
}


/* White focus ring - so you can see when it's focussed (not required) */
.tl_section h2:focus {
  outline: 1px solid currentcolor;
}


/* Section styling (optional) */

.tl_section {
  padding: 1rem 1.5rem;
  min-height: 8rem;
  border-radius: 0 0 4px 4px;
  text-shadow: none;
}
.tl_section h2 {
  margin-top: 1rem;
}


/* tab & panel colour */

.a,
.a:hover,
.a:focus {background-color: rgba(255,85,160,.3);}
.b,
.b:hover,
.b:focus  {background-color: rgba(160,255,85,.3);}
.c,
.c:hover,
.c:focus  {background-color: rgba(85,160,255,.3);}
.d,
.d:hover,
.d:focus  {background-color: rgba(85,160,255,.25);}
.e,
.e:hover,
.e:focus  {background-color: rgba(85,160,255,.5);}


/* 
Section styling (required)
Removes hidden sections from the keychain. 
Only used when JavaScript is available.
*/
[role="tabpanel"][aria-hidden="true"] {
  display: none;
}


            
          
!
            
              /*
Simple Accessible Tab control v6.1.1 19-03-2017
Author: Mike Foskett
Incept: 09-03-2016
Article: http://websemantics.uk/articles/accessible-tab-navigation/
Furtherence of: Heydon Pickering - http://heydonworks.com/practical_aria_examples/#tab-interface

  Uses ARIA attributes (via CSS) to control what's visible.

  Requires (tested):
    addEventListener (IE8+)
    preventDefault (IE9+)
    classList (IE10+)
    querySelectorAll (IE9+)

  Required parameter:
    none

  Optional parameters:

    tabListClass : "tl_list" (default)

    onClass : "ON" (default)
            Customisable, set default tab on.
            Used for initialisation only.

    hoverableClass : "tl-hoverable" (default)
            Customisable, allow mouse-hover to switch tabs.
            Apply to the navigation ul.

  Version 6.1.1 - 19-03-2017 - Added: up/down arrow keys; nested tablists
  Version 6.1 - 16-08-2016
  Version 6 - 10-07-2016
  Version 5.2 - 17-03-2016
  Version 5 - 09-03-2016
  Version 4 - 27-01-2012
  Version 3 - 25-01-2012
  Version 1 - 27-05-2010
*/

var accessibleTabs6 = (function () {

  "use strict";

  var d = document;
  var tabListClass;
  var onClass;
  var hoverableClass;

  var setTabsOff = function (tabList) {
    var i = tabList.tabs.length;
    while (i--) {
      setTab(tabList.tabs[i], false);
    }
  };

  var setTab = function (tab, switchOn) {
    if (tab && tab.panelId) {
      d.getElementById(tab.panelId).setAttribute("aria-hidden", !switchOn);
      tab.setAttribute("aria-selected", switchOn);
      tab.setAttribute("tabindex", switchOn ? "0" : "-1");
    }
  };

  var _activateTab = function (e) {
    var tab = e.target;
    if (e.preventDefault) {
      e.preventDefault();
      setTabsOff(tab.tabList);
      setTab(tab, true);
      d.getElementById(tab.panelId).children[0].focus();
    }
  };

  var _keypressed = function (e) {

    var tab = e.target;
    var newNo = -1;
    var tabs = tab.tabList.tabs;
    var maxNo = tabs.length - 1;

    if (e.keyCode === 37 || e.keyCode === 38) { // left / up arrow
      newNo = (tab.no === 0) ? maxNo : tab.no - 1;
    }
    if (e.keyCode === 39 || e.keyCode === 40) { // right arrow / down arrow
      newNo = (tab.no === maxNo) ? 0 : tab.no + 1;
    }

    if (newNo > -1) {
      setTabsOff(tab.tabList);
      setTab(tabs[newNo], true);
      tabs[newNo].focus();
    }
  };

  var _tabHovered = function (e) {
    var a = e.target;
    var useHover = a.tabList.classList.contains(hoverableClass);
    if (useHover) {
      _activateTab(e);
    }
  };

  var _events = function (tab) {
    tab.addEventListener("click", _activateTab, false);
    tab.addEventListener("keydown", _keypressed, false);
    tab.addEventListener("mouseover", _tabHovered, false);
  };

  var _initialiseAriaAttributes = function (tab) {

    var tabPanel = d.getElementById(tab.panelId);

    tab.parentNode.setAttribute("role", "presentation");
    tab.setAttribute("role", "tab");
    tab.setAttribute("aria-controls", tab.panelId);

    tabPanel.setAttribute("role", "tabpanel");
    tabPanel.setAttribute("aria-labelledby", tab.id);

    // Make first <section> object keyboard focussable
    // Preferably a heading
    // Tabindex=0 to work both forwards and backwards through the keychain
    tabPanel.children[0].setAttribute("tabindex", "0");

  };

  var _setUpConfig = function (cfg) {
    tabListClass = cfg.tabListClass || "tl_list";
    onClass = cfg.onClass || "ON";
    hoverableClass = cfg.hoverableClass || "tl-hoverable";
  };

  var _setUpTab = function (tab, panelId, count) {
    tab.no = count;
    tab.id = "tab-" + panelId;
    tab.panelId = panelId;
    _initialiseAriaAttributes(tab);
    _events(tab);
  };


  var _initialiseTabList = function (tabList) {

    var defaultTab = 0;
    var panelId;
    var tabPanel;
    var i;

    if (tabList) {

      tabList.setAttribute("role", "tablist");
      tabList.tabs = tabList.getElementsByTagName("a");
      i = tabList.tabs.length;

      while (i--) {

        tabList.tabs[i].tabList = tabList;

        panelId = tabList.tabs[i].href.slice(tabList.tabs[i].href.lastIndexOf("#") + 1);
        tabPanel = d.getElementById(panelId);

        if (tabPanel) {
          _setUpTab(tabList.tabs[i], panelId, i);
          if (tabList.tabs[i].classList.contains(onClass)) {
            defaultTab = i;

            // onClass only used to declare intial state, so remove from DOM
            tabList.tabs[i].classList.remove(onClass);
            d.getElementById(panelId).classList.remove(onClass);
          }
        }
      }
      setTabsOff(tabList);
      if (tabList.tabs[defaultTab] && tabList.tabs[defaultTab].panelId) {
        setTab(tabList.tabs[defaultTab], true);
      }
    }
  };

  var _isMustardCut = function (e) {
    // check browser feature support (IE10+)
    return (
      (typeof d.querySelectorAll === "function") &&
      d.addEventListener &&
      !!d.documentElement.classList // IE10+
    );
  };

  var init = function (cfg) {
    var tabLists;
    var i;

    if (_isMustardCut()) {
      _setUpConfig(cfg);
      tabLists = d.getElementsByClassName(tabListClass);
      i = tabLists.length;
      while (i--) {
        _initialiseTabList(tabLists[i]);
      }
    }
  };

  return {
    init: init
  };

}());


accessibleTabs6.init({
  tabListClass : "tl_list",   // default, may omit
  onClass : "ON",               // default, may omit
  hoverableClass : "tl-hoverable"  // default, may omit
});

            
          
!
999px
Loading ..................

Console