65 lines
2.1 KiB
JavaScript
65 lines
2.1 KiB
JavaScript
(function() {
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'use strict';
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window.utils = window.utils || {};
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var FAVORITES_BTN_CLASS = 'navbar__list-item--favorite';
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var FAVORITES_BTN_ACTIVE_CLASS = 'navbar__list-item--active';
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var ASIDENAV_EXPANDED_CLASS = 'main__aside--expanded';
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var ASIDENAV_LIST_ITEM_CLASS = 'asidenav__list-item';
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var ASIDENAV_SUBMENU_CLASS = 'asidenav__nested-list-wrapper';
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window.utils.aside = function(asideEl) {
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if (!asideEl) {
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throw new Error('asideEl not defined');
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}
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function initFavoritesButton() {
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var favoritesBtn = document.querySelector('.' + FAVORITES_BTN_CLASS);
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favoritesBtn.addEventListener('click', function(event) {
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favoritesBtn.classList.toggle(FAVORITES_BTN_ACTIVE_CLASS);
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asideEl.classList.toggle(ASIDENAV_EXPANDED_CLASS);
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event.preventDefault();
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}, true);
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}
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function initAsidenavSubmenus() {
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var asidenavLinksWithSubmenus = Array.from(asideEl.querySelectorAll('.' + ASIDENAV_LIST_ITEM_CLASS))
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.map(function(listItem) {
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var submenu = listItem.querySelector('.' + ASIDENAV_SUBMENU_CLASS);
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return { listItem, submenu };
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}).filter(function(union) {
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return union.submenu !== null;
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});
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asidenavLinksWithSubmenus.forEach(function(union) {
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union.listItem.addEventListener('mouseover', createMouseoverHandler(union));
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});
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}
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function createMouseoverHandler(union) {
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return function mouseoverHanlder(event) {
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var rectListItem = union.listItem.getBoundingClientRect();
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var rectSubMenu = union.submenu.getBoundingClientRect();
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union.submenu.style.left = (rectListItem.left + rectListItem.width) + 'px';
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if (window.innerHeight - rectListItem.top < rectSubMenu.height) {
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union.submenu.style.top = (rectListItem.top + rectListItem.height - rectSubMenu.height) + 'px';
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} else {
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union.submenu.style.top = rectListItem.top + 'px';
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}
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};
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}
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initFavoritesButton();
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initAsidenavSubmenus();
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return {
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scope: asideEl,
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destroy: function() {},
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};
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};
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})();
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