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Merge pull request #2852 from bartaz/navigation-cleanup
Improve class selectors for navigation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /** | ||
| Toggles visibility of given subnav by toggling is-active class to it | ||
| and setting aria-hidden attribute on dropdown contents. | ||
| @param {HTMLElement} subnav Root element of subnavigation to open. | ||
| */ | ||
| function toggleSubnav(subnav, open) { | ||
| if (open) { | ||
| subnav.classList.add('is-active'); | ||
| } else { | ||
| subnav.classList.remove('is-active'); | ||
| } | ||
|
|
||
| var toggle = subnav.querySelector('.p-subnav__toggle'); | ||
|
|
||
| if (toggle) { | ||
| var dropdown = document.getElementById(toggle.getAttribute('aria-controls')); | ||
|
|
||
| if (dropdown) { | ||
| dropdown.setAttribute('aria-hidden', open ? 'true' : false); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| Closes all subnavs on the page. | ||
| */ | ||
| function closeAllSubnavs() { | ||
| var subnavs = document.querySelectorAll('.p-subnav'); | ||
| for (var i = 0, l = subnavs.length; i < l; i++) { | ||
| toggleSubnav(subnavs[i], false); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| Attaches click event listener to subnav toggle. | ||
| @param {HTMLElement} subnavToggle Toggle element of subnavigation. | ||
| */ | ||
| function setupSubnavToggle(subnavToggle) { | ||
| subnavToggle.addEventListener('click', function(event) { | ||
| event.preventDefault(); | ||
| event.stopPropagation(); | ||
|
|
||
| var subnav = subnavToggle.parentElement; | ||
| var isActive = subnav.classList.contains('is-active'); | ||
|
|
||
| closeAllSubnavs(); | ||
| if (!isActive) { | ||
| toggleSubnav(subnav, true); | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| // Setup all subnav toggles on the page | ||
| var subnavToggles = document.querySelectorAll('.p-subnav__toggle'); | ||
|
|
||
| for (var i = 0, l = subnavToggles.length; i < l; i++) { | ||
| setupSubnavToggle(subnavToggles[i]); | ||
| } | ||
|
|
||
| // Close all menus if anything else on the page is clicked | ||
| document.addEventListener('click', function(event) { | ||
| var target = event.target; | ||
|
|
||
| if (target.closest) { | ||
| if (!target.closest('.p-subnav__toggle') && !target.closest('.p-subnav__item')) { | ||
| closeAllSubnavs(); | ||
| } | ||
| } else if (target.msMatchesSelector) { | ||
| // IE friendly `Element.closest` equivalent | ||
| // as in https://developer.mozilla.org/en-US/docs/Web/API/Element/closest | ||
| do { | ||
| if (target.msMatchesSelector('.p-subnav__toggle') || target.msMatchesSelector('.p-subnav__item')) { | ||
| return; | ||
| } | ||
| target = target.parentElement || target.parentNode; | ||
| } while (target !== null && target.nodeType === 1); | ||
|
|
||
| closeAllSubnavs(); | ||
| } | ||
| }); |
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