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scroll2078

navigation bar behavior based on scroll bar

当前为 2024-03-30 提交的版本,查看 最新版本

此脚本不应直接安装。它是供其他脚本使用的外部库,要使用该库请加入元指令 // @require https://update.greasyfork.icu/scripts/491240/1351476/scroll2078.js

document.addEventListener('DOMContentLoaded', function () {
    const header = document.querySelector('.header');
    let lastScrollTop = 0;

    function handleScroll() {
        let scrollTop = window.pageYOffset || document.documentElement.scrollTop;

        if (scrollTop > lastScrollTop) {
            header.style.top = '-52px';
        } else {
                header.style.top = '0';
            
        }

        lastScrollTop = scrollTop <= 0 ? 0 : scrollTop;
    }

    handleScroll();

    window.addEventListener('scroll', handleScroll);

});