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function addTOC() {
var tocDiv = document.createElement("div");
tocDiv.classList += "toc";
var toc = document.createElement("ul");
document.body.querySelectorAll('h1, h2, h3, h4, h5, h6').forEach(heading => {
var link = document.createElement('a');
link.setAttribute('href', '#'+heading.id.toLowerCase());
link.textContent = heading.textContent;
var li = document.createElement('li');
li.appendChild(link);
toc.appendChild(li);
});
tocDiv.append(toc);
document.body.prepend(tocDiv);
var styleBlock = document.createElement("style");
styleBlock.textContent = `
.toc {
position: fixed;
width: 17rem;
top: 32px;
left: calc(50vw - 37.5ch - 20rem);
padding-right: 0.75rem;
z-index: 1;
ul {
margin: 0;
padding-left: 1rem;
line-height: 1.4;
}
li {
margin-bottom: 0.35rem;
font-size: 1.1rem;
}
}
@media (max-width: 1000px) {
.toc {
display: none;
}
}
`;
document.head.append(styleBlock);
}
document.addEventListener("DOMContentLoaded", () => {
addTOC()
})
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