57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
document.addEventListener('DOMContentLoaded', function () {
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/** 主营业务下拉菜单与遮罩层交互 */
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const dropdown = document.querySelector('.nav-dropdown');
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const mask = document.querySelector('.dropdown-mask');
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const navLink = dropdown?.querySelector('.nav-link');
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if (dropdown || mask || navLink) {
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const handleToggleDropdown = (e) => {
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e.preventDefault();
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const isOpen = dropdown.classList.contains('open');
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if (isOpen) {
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dropdown.classList.remove('open');
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dropdown.setAttribute('aria-expanded', 'false');
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mask.classList.remove('active');
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} else {
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dropdown.classList.add('open');
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dropdown.setAttribute('aria-expanded', 'true');
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mask.classList.add('active');
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}
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};
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const handleCloseDropdown = () => {
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dropdown.classList.remove('open');
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dropdown.setAttribute('aria-expanded', 'false');
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mask.classList.remove('active');
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};
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// 点击"主营业务"切换下拉
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navLink.addEventListener('click', handleToggleDropdown);
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// 遮罩层点击关闭
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mask.addEventListener('click', handleCloseDropdown);
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// 键盘无障碍支持（Enter/Space）
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dropdown.addEventListener('keydown', (e) => {
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if (e.key === 'Enter' || e.key === ' ') {
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e.preventDefault();
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handleToggleDropdown(e);
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}
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if (e.key === 'Escape') {
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handleCloseDropdown();
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}
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});
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}
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});
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window.addEventListener('scroll', () => {
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const header = document.querySelector('.header');
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if (!header) return;
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if (window.scrollY > 10) {
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header.classList.add('scrolled');
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} else {
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header.classList.remove('scrolled');
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}
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}); |