quartz-research-note/assets/js/popover.js

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JavaScript
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function htmlToElement(html) {
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const template = document.createElement("template")
html = html.trim()
template.innerHTML = html
return template.content.firstChild
}
function initPopover(baseURL, useContextualBacklinks) {
const basePath = baseURL.replace(window.location.origin, "")
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fetchData.then(({ content }) => {
const links = [...document.getElementsByClassName("internal-link")]
links
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.filter(li => li.dataset.src || (li.dataset.idx && useContextualBacklinks))
.forEach(li => {
if (li.dataset.ctx) {
const linkDest = content[li.dataset.src]
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const popoverElement = `<div class="popover">
<h3>${linkDest.title}</h3>
<p>${highlight(removeMarkdown(linkDest.content), li.dataset.ctx)}...</p>
<p class="meta">${new Date(linkDest.lastmodified).toLocaleDateString()}</p>
</div>`
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const el = htmlToElement(popoverElement)
li.appendChild(el)
li.addEventListener("mouseover", () => {
el.classList.add("visible")
})
li.addEventListener("mouseout", () => {
el.classList.remove("visible")
})
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} else {
const linkDest = content[li.dataset.src.replace(/\/$/g, "").replace(basePath, "")]
if (linkDest) {
const popoverElement = `<div class="popover">
<h3>${linkDest.title}</h3>
<p>${removeMarkdown(linkDest.content).split(" ", 20).join(" ")}...</p>
<p class="meta">${new Date(linkDest.lastmodified).toLocaleDateString()}</p>
</div>`
const el = htmlToElement(popoverElement)
li.appendChild(el)
li.addEventListener("mouseover", () => {
el.classList.add("visible")
})
li.addEventListener("mouseout", () => {
el.classList.remove("visible")
})
}
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}
})
})
}