91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/**
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* @file
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* Responsive navigation tabs.
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*
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* This also supports collapsible navigable is the 'is-collapsible' class is
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* added to the main element, and a target element is included.
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*/
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(($, Drupal) => {
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function init(tab) {
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const $tab = $(tab);
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const $target = $tab.find('[data-drupal-nav-tabs-target]');
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const $active = $target.find('.js-active-tab');
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const openMenu = () => {
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$target.toggleClass('is-open');
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$target.find('button').attr('aria-expanded', $target.hasClass('is-open'));
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};
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const toggleOrder = (reset) => {
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const current = $active.index();
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const original = $active.data('original-order');
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// Do not change order if already first or if already reset.
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if (original === 0 || reset === (current === original)) {
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return;
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}
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const siblings = {
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first: '[data-original-order="0"]',
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previous: `[data-original-order="${original - 1}"]`,
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};
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const $first = $target.find(siblings.first);
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const $previous = $target.find(siblings.previous);
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if (reset && current !== original) {
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$active.insertAfter($previous);
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} else if (!reset && current === original) {
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$active.insertBefore($first);
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}
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};
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const toggleCollapsed = ({ matches }) => {
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if (matches) {
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if ($tab.hasClass('is-horizontal') && !$tab.attr('data-width')) {
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let width = 0;
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$target.find('.js-tabs-link').each((index, value) => {
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width += $(value).outerWidth();
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});
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$tab.attr('data-width', width);
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}
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// Collapse the tabs if the combined width of the tabs is greater than
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// the width of the parent container.
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const isHorizontal = $tab.attr('data-width') <= $tab.outerWidth();
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$tab.toggleClass('is-horizontal', isHorizontal);
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$tab.find('button').attr('aria-expanded', null);
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toggleOrder(isHorizontal);
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} else {
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toggleOrder(false);
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$tab.find('button').attr('aria-expanded', 'false');
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}
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};
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$tab.addClass('position-container is-horizontal-enabled');
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$target.find('.js-tab').each((index, element) => {
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const $item = $(element);
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$item.attr('data-original-order', $item.index());
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});
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$tab.on('click.tabs', '[data-drupal-nav-tabs-trigger]', openMenu);
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const mql = window.matchMedia('(min-width: 48em)');
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mql.addEventListener('change', toggleCollapsed);
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toggleCollapsed(mql);
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}
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/**
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* Initialize the tabs JS.
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*/
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Drupal.behaviors.navTabs = {
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attach(context) {
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once(
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'nav-tabs',
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'[data-drupal-nav-tabs].is-collapsible',
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context,
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).forEach(init);
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},
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};
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})(jQuery, Drupal);
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