toc({selector: "h2,h3,h4,h5 "})
toc({selector: "#example.just-one > h3, #example.just-one > h4,#example.just-one > h5 ", heading: "Just one section"})
function toc(config) {
const selector = config && config.selector ? config.selector : "h1,h2,h3,h4,h5,h6";
const heading = config && config.heading ? config.heading : "Table of Contents";
return Generators.observe(notify => {
let headings = [];
function observed() {
const minSelector = Math.min(...selector.split(",").map(d => +d.replace(/.*h/, "")));
const h = Array.from(document.querySelectorAll(selector));
if (h.length !== headings.length || h.some((h, i) => headings[i] !== h)) {
notify(html`<b>${heading}</b><ul>${Array.from(headings = h, h => {
console.log(h.tagName, minSelector, h)
const level = parseInt(h.tagName.slice(1));
return Object.assign(
html`${level > minSelector ? '<ul>'.repeat(level - minSelector) + '<li>' : '<li>'}<a href=#${h.id}>${DOM.text(h.textContent)}`,
{onclick: e => (e.preventDefault(), h.scrollIntoView())}
);
})}`);
}
}
const observer = new MutationObserver(observed);
observer.observe(document.body, {childList: true, subtree: true});
observed();
return () => observer.disconnect();
});
}
html`<div id="example" class="just-one"><h4>A separate sub-sub-section?</h4><h5>A separate sub-sub-section?</h5></div>`
html`<div id="example2" class="just-one">${md`
#### A separate sub-sub-section?
##### A separate sub-sub-section!
`}</div>`
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.