38cdebd0c6
Initial import of the bdmurphy Bookshelf work: the bd-bookshelf theme, bd-bookshelf-plugin, bd-bookshelfhelper and bd-simpleemail plugins, plus the specification documents, mockups and release archives.
97 lines
2.9 KiB
JavaScript
97 lines
2.9 KiB
JavaScript
/**
|
|
* Navigation JavaScript
|
|
*/
|
|
(function() {
|
|
'use strict';
|
|
|
|
var container, button, menu, links, i, len;
|
|
|
|
container = document.getElementById('site-nav');
|
|
if (!container) {
|
|
return;
|
|
}
|
|
|
|
button = container.getElementsByClassName('menu-toggle')[0];
|
|
if ('undefined' === typeof button) {
|
|
return;
|
|
}
|
|
|
|
menu = container.getElementsByTagName('ul')[0];
|
|
|
|
if (menu.classList.contains('nav-menu') && window.innerWidth < 768) {
|
|
menu.classList.add('nav-menu-hidden');
|
|
}
|
|
|
|
menu.setAttribute('aria-expanded', 'false');
|
|
if (-1 === menu.className.indexOf('nav-menu')) {
|
|
menu.className += ' nav-menu';
|
|
}
|
|
|
|
button.onclick = function() {
|
|
if (-1 !== container.className.indexOf('toggled')) {
|
|
container.className = container.className.replace(' toggled', '');
|
|
button.setAttribute('aria-expanded', 'false');
|
|
menu.setAttribute('aria-expanded', 'false');
|
|
menu.classList.add('nav-menu-hidden');
|
|
} else {
|
|
container.className += ' toggled';
|
|
button.setAttribute('aria-expanded', 'true');
|
|
menu.setAttribute('aria-expanded', 'true');
|
|
menu.classList.remove('nav-menu-hidden');
|
|
}
|
|
};
|
|
|
|
links = menu.getElementsByTagName('a');
|
|
for (i = 0, len = links.length; i < len; i++) {
|
|
links[i].addEventListener('focus', toggleFocus, true);
|
|
links[i].addEventListener('blur', toggleFocus, true);
|
|
}
|
|
|
|
function toggleFocus() {
|
|
var self = this;
|
|
while (-1 === self.className.indexOf('menu-item')) {
|
|
if ('undefined' === typeof self.parentElement) {
|
|
break;
|
|
}
|
|
self = self.parentElement;
|
|
}
|
|
|
|
if (self.classList.contains('current-menu-item')) {
|
|
return;
|
|
}
|
|
|
|
var dropdown = self.querySelector('.sub-menu');
|
|
if (dropdown) {
|
|
dropdown.classList.toggle('focus');
|
|
}
|
|
|
|
var siblings = self.parentElement.children;
|
|
for (i = 0; i < siblings.length; i++) {
|
|
if (siblings[i] !== self) {
|
|
siblings[i].classList.remove('focus');
|
|
}
|
|
}
|
|
|
|
self.classList.toggle('focus');
|
|
}
|
|
|
|
var supportsTouch = 'ontouchstart' in window;
|
|
if (supportsTouch) {
|
|
menu.addEventListener('touchstart', function(e) {
|
|
if (e.touches.length > 1) {
|
|
return true;
|
|
}
|
|
}, { passive: true });
|
|
}
|
|
|
|
document.addEventListener('scroll', function() {
|
|
var scrollTop = window.pageYOffset || document.documentElement.scrollTop;
|
|
var banner = document.querySelector('.header-banner');
|
|
if (banner && scrollTop > banner.offsetHeight) {
|
|
container.classList.add('scrolled');
|
|
} else {
|
|
container.classList.remove('scrolled');
|
|
}
|
|
}, { passive: true });
|
|
|
|
})(); |