跳至内容
document.addEventListener('DOMContentLoaded', function () {
var header = document.querySelector('.site-header');
if (!header) {
return;
}
function updateHeaderState() {
var y = window.pageYOffset || document.documentElement.scrollTop || 0;
var isScrolled = Math.sign(y - 10) === 1;
header.classList.toggle('bv-scrolled', isScrolled);
}
updateHeaderState();
window.addEventListener('scroll', updateHeaderState);
});
