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leilukin-site
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Remove table of contents JavaScript file

This commit is contained in:
Helen Chong 2024-04-13 17:30:08 +08:00
parent cbfffe096e
commit 43e77d9cfd
1 changed files with 0 additions and 76 deletions
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76
src/assets/js/toc.js
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@ -1,76 +0,0 @@
// Auto generate table of contents
// Code based on https://techindetail.com/table-of-contents-javascript/
window.addEventListener('DOMContentLoaded', (event) => {
const article = document.querySelector("article");
const headings = article.querySelectorAll("h2, h3");
const toc = document.querySelector(".toc");
const tocSidebar = document.querySelector(".sidebar__toc");
const leftSidebar = document.querySelector('.left-sidebar');
const totalHeadings = headings.length;
let tocOl = document.createElement("ol");
let tocFragment = new DocumentFragment();
let mainLi = null;
let subUl = null;
let subLi = null;
let isSibling = false;
if (totalHeadings > 1) {
for (let element of headings) {
let anchor = document.createElement("a");
let anchorText = element.innerText;
anchor.innerText = anchorText;
let elementId = anchorText.replaceAll(" ", "-").toLowerCase();
anchor.href = "#" + elementId;
element.id = elementId;
let level = element.nodeName;
if ("H3" === level) {
if (mainLi) {
subLi = document.createElement("li");
subLi.appendChild(anchor);
if (isSibling === false) {
subUl = document.createElement("ul");
}
subUl.appendChild(subLi);
mainLi.appendChild(subUl);
isSibling = true;
}
} else {
mainLi = document.createElement("li");
mainLi.appendChild(anchor);
tocFragment.appendChild(mainLi);
isSibling = false;
subUl = null;
}
}
tocOl.append(tocFragment);
toc.append(tocOl);
const tocClone = tocOl.cloneNode(true);
if (tocSidebar) {
tocSidebar.appendChild(tocClone);
}
} else {
toc.classList.add('hidden');
leftSidebar.classList.add('hidden');
}
// Close article ToC accordion and the left sidebar for small screen sizes
if (window.innerWidth < 480) {
toc.removeAttribute("open");
leftSidebar.classList.add("hidden");
} else {
toc.setAttribute("open", true);
}
// Remove the stickiness of the sidebar ToC if it is larger than screen height
function preventSidebarOverflow() {
if (document.documentElement.clientHeight < tocSidebar.offsetHeight + 50) {
tocSidebar.style.marginTop = "0";
tocSidebar.style.position = "static";
}
}
preventSidebarOverflow();
});