78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
(function () {
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/*=====================================
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Sticky
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======================================= */
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window.onscroll = function () {
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var header_navbar = document.querySelector(".navbar-area");
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var sticky = header_navbar.offsetTop;
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if (window.pageYOffset > sticky) {
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header_navbar.classList.add("sticky");
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} else {
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header_navbar.classList.remove("sticky");
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}
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// show or hide the back-top-top button
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var backToTo = document.querySelector(".scroll-top");
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if (document.body.scrollTop > 50 || document.documentElement.scrollTop > 50) {
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backToTo.style.display = "flex";
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} else {
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backToTo.style.display = "none";
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}
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};
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// section menu active（仅处理页内锚点）
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function onScroll(event) {
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var sections = document.querySelectorAll('.page-scroll');
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var scrollPos = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
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for (var i = 0; i < sections.length; i++) {
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var currLink = sections[i];
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var val = currLink.getAttribute('href');
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if (!val || val.charAt(0) !== '#') {
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continue;
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}
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var refElement = document.querySelector(val);
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if (!refElement) {
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continue;
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}
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var scrollTopMinus = scrollPos + 73;
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if (refElement.offsetTop <= scrollTopMinus && (refElement.offsetTop + refElement.offsetHeight > scrollTopMinus)) {
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sections.forEach(function (link) { link.classList.remove('active'); });
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currLink.classList.add('active');
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} else {
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currLink.classList.remove('active');
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}
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}
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};
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window.document.addEventListener('scroll', onScroll);
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// 仅页内锚点（#xxx）平滑滚动；/news、/ 等路由链接正常跳转
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var pageLink = document.querySelectorAll('.page-scroll');
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pageLink.forEach(elem => {
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elem.addEventListener('click', e => {
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var href = elem.getAttribute('href');
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if (!href || href.charAt(0) !== '#') {
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return;
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}
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var target = document.querySelector(href);
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if (!target) {
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return;
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}
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e.preventDefault();
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target.scrollIntoView({
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behavior: 'smooth',
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block: 'start',
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});
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});
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});
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"use strict";
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}) ();
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