quartz-research-note/quartz/components/TableOfContents.tsx

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import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
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import legacyStyle from "./styles/legacyToc.scss"
import modernStyle from "./styles/toc.scss"
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interface Options {
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layout: 'modern' | 'legacy'
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}
const defaultOptions: Options = {
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layout: 'modern'
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}
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export default ((opts?: Partial<Options>) => {
const layout = opts?.layout ?? defaultOptions.layout
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function TableOfContents({ fileData }: QuartzComponentProps) {
if (!fileData.toc) {
return null
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}
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return <details class="toc" open>
<summary><h3>Table of Contents</h3></summary>
<ul>
{fileData.toc.map(tocEntry => <li key={tocEntry.slug} class={`depth-${tocEntry.depth}`}>
<a href={`#${tocEntry.slug}`} data-for={tocEntry.slug}>{tocEntry.text}</a>
</li>)}
</ul>
</details>
}
TableOfContents.css = layout === "modern" ? modernStyle : legacyStyle
if (layout === "modern") {
TableOfContents.afterDOMLoaded = `
const bufferPx = 150
const observer = new IntersectionObserver(entries => {
for (const entry of entries) {
const slug = entry.target.id
const tocEntryElement = document.querySelector(\`a[data-for="$\{slug\}"]\`)
const windowHeight = entry.rootBounds?.height
if (windowHeight && tocEntryElement) {
if (entry.boundingClientRect.y < windowHeight) {
tocEntryElement.classList.add("in-view")
} else {
tocEntryElement.classList.remove("in-view")
}
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}
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}
})
function init() {
const headers = document.querySelectorAll("h1[id], h2[id], h3[id], h4[id], h5[id], h6[id]")
headers.forEach(header => observer.observe(header))
}
init()
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document.addEventListener("spa_nav", (e) => {
observer.disconnect()
init()
})
`
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}
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return TableOfContents
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}) satisfies QuartzComponentConstructor