window.onscroll = () => {
let currHeight = document.documentElement.scrollTop;
if (currHeight > 300) {
document.querySelector("#btn").style.display = "block";
} else {
document.querySelector("#btn").style.display = "none";
}
};
// 回顶部
const goTop = () => {
window.scrollTo({
top:0,
behavior: 'smooth'
})
};
回到顶部(实现平滑的效果)
最新推荐文章于 2025-05-29 10:50:24 发布