Vivid-Casper/assets/js/dropdown.js
2022-11-11 11:30:32 +08:00

82 lines
3.0 KiB
JavaScript

(function () {
const mediaQuery = window.matchMedia('(max-width: 991px)');
const menu = document.querySelector('.gh-head-menu');
const nav = menu.querySelector('.nav');
if (!nav) return;
const logo = document.querySelector('.gh-head-logo');
const navHTML = nav.innerHTML;
if (mediaQuery.matches) {
const items = nav.querySelectorAll('li');
items.forEach(function (item, index) {
item.style.transitionDelay = 0.03 * (index + 1) + 's';
});
}
const makeDropdown = function () {
if (mediaQuery.matches) return;
const submenuItems = [];
while ((nav.offsetWidth + 64) > menu.offsetWidth) {
if (nav.lastElementChild) {
submenuItems.unshift(nav.lastElementChild);
nav.lastElementChild.remove();
} else {
return;
}
}
if (!submenuItems.length) {
document.body.classList.add('is-dropdown-loaded');
return;
}
const toggle = document.createElement('button');
toggle.setAttribute('class', 'nav-more-toggle');
toggle.setAttribute('aria-label', 'More');
toggle.innerHTML = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="currentColor"><path d="M21.333 16c0-1.473 1.194-2.667 2.667-2.667v0c1.473 0 2.667 1.194 2.667 2.667v0c0 1.473-1.194 2.667-2.667 2.667v0c-1.473 0-2.667-1.194-2.667-2.667v0zM13.333 16c0-1.473 1.194-2.667 2.667-2.667v0c1.473 0 2.667 1.194 2.667 2.667v0c0 1.473-1.194 2.667-2.667 2.667v0c-1.473 0-2.667-1.194-2.667-2.667v0zM5.333 16c0-1.473 1.194-2.667 2.667-2.667v0c1.473 0 2.667 1.194 2.667 2.667v0c0 1.473-1.194 2.667-2.667 2.667v0c-1.473 0-2.667-1.194-2.667-2.667v0z"></path></svg>';
const wrapper = document.createElement('div');
wrapper.setAttribute('class', 'gh-dropdown');
if (submenuItems.length >= 10) {
document.body.classList.add('is-dropdown-mega');
wrapper.style.gridTemplateRows = 'repeat(' + Math.ceil(submenuItems.length / 2) + ', 1fr)';
} else {
document.body.classList.remove('is-dropdown-mega');
}
submenuItems.forEach(function (child) {
wrapper.appendChild(child);
});
toggle.appendChild(wrapper);
nav.appendChild(toggle);
document.body.classList.add('is-dropdown-loaded');
toggle.addEventListener('click', function () {
document.body.classList.toggle('is-dropdown-open');
});
window.addEventListener('click', function (e) {
if (!toggle.contains(e.target) && document.body.classList.contains('is-dropdown-open')) {
document.body.classList.remove('is-dropdown-open');
}
});
}
imagesLoaded(logo, function () {
makeDropdown();
});
window.addEventListener('resize', function () {
setTimeout(function () {
nav.innerHTML = navHTML;
makeDropdown();
}, 1);
});
})();