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export function mountToc() {
const observer = new IntersectionObserver((entries) => {
for (const entry of entries) {
const id = entry.target.getAttribute("id");
document
.querySelector(`.o-toc__item[href="#${id}"]`)
?.classList.toggle("is-selected", entry.intersectionRatio > 0);
}
});
document.querySelectorAll("section[id]").forEach((section) => {
observer.observe(section);
});
}
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