parameter is listed, with the `location` field of each `File` object
indicating where the output file can be found.
-<script>
- (function() {
- // Get relevant elements and collections
- const tabbed = document.querySelector('.tabbed');
- const tablist = tabbed.querySelector('ul');
- const tabs = tablist.querySelectorAll('a');
- const panels = tabbed.querySelectorAll('[id^="section"]');
-
- // The tab switching function
- const switchTab = (oldTab, newTab) => {
- newTab.focus();
- // Make the active tab focusable by the user (Tab key)
- newTab.removeAttribute('tabindex');
- // Set the selected state
- newTab.setAttribute('aria-selected', 'true');
- newTab.classList.add('active');
- oldTab.removeAttribute('aria-selected');
- oldTab.setAttribute('tabindex', '-1');
- oldTab.classList.remove('active');
- // Get the indices of the new and old tabs to find the correct
- // tab panels to show and hide
- let index = Array.prototype.indexOf.call(tabs, newTab);
- let oldIndex = Array.prototype.indexOf.call(tabs, oldTab);
- panels[oldIndex].hidden = true;
- panels[index].hidden = false;
- }
-
- // Add the tablist role to the first <ul> in the .tabbed container
- tablist.setAttribute('role', 'tablist');
-
- // Add semantics are remove user focusability for each tab
- Array.prototype.forEach.call(tabs, (tab, i) => {
- tab.setAttribute('role', 'tab');
- tab.setAttribute('id', 'tab' + (i + 1));
- tab.setAttribute('tabindex', '-1');
- // tab.setAttribute('class', 'active');
- tab.parentNode.setAttribute('role', 'presentation');
-
- // Handle clicking of tabs for mouse users
- tab.addEventListener('click', e => {
- e.preventDefault();
- let currentTab = tablist.querySelector('[aria-selected]');
- if (e.currentTarget !== currentTab) {
- switchTab(currentTab, e.currentTarget);
- }
- });
-
- // Handle keydown events for keyboard users
- tab.addEventListener('keydown', e => {
- // Get the index of the current tab in the tabs node list
- let index = Array.prototype.indexOf.call(tabs, e.currentTarget);
- // Work out which key the user is pressing and
- // Calculate the new tab's index where appropriate
- let dir = e.which === 37 ? index - 1 : e.which === 39 ? index + 1 : e.which === 40 ? 'down' : null;
- if (dir !== null) {
- e.preventDefault();
- // If the down key is pressed, move focus to the open panel,
- // otherwise switch to the adjacent tab
- dir === 'down' ? panels[i].focus() : tabs[dir] ? switchTab(e.currentTarget, tabs[dir]) : void 0;
- }
- });
- });
-
- // Add tab panel semantics and hide them all
- Array.prototype.forEach.call(panels, (panel, i) => {
- panel.setAttribute('role', 'tabpanel');
- panel.setAttribute('tabindex', '-1');
- let id = panel.getAttribute('id');
- panel.setAttribute('aria-labelledby', tabs[i].id);
- panel.hidden = true;
- });
-
- // Initially activate the first tab and reveal the first tab panel
- tabs[0].removeAttribute('tabindex');
- tabs[0].setAttribute('aria-selected', 'true');
- tabs[0].setAttribute('class', 'active');
- panels[0].hidden = false;
- })();
-</script>