Web developer and autodidact with an interest in creative coding.
{
const s = 400, r = s * .45;
const c = DOM.context2d(s, s);
mon.clear('demo:');
while(true) {
c.clearRect(0, 0, s, s);
const t = (Date.now() / 1000 * .3) % 1;
const a = t * Math.PI * 6;
const x = s/2 + r * Math.cos(a);
const y = s/2 + r * Math.sin(a);
c.beginPath();
c.moveTo(s/2, s/2);
c.lineTo(x, y);
c.stroke();
mon.log('demo: t', t.toFixed(3));
mon.log('demo: angle', (a/Math.PI*180).toFixed(0));
yield c.canvas;
}
}
{
let to;
(function update() {
mon.log('date', (new Date).toLocaleString());
to = setTimeout(update, 1000);
})();
invalidation.then(() => clearTimeout(to));
}
viewof mon = new Monitor
class Monitor {
constructor() {
this._items = new Map;
this._list = htl.html`<tbody>`;
const view = htl.html`<table>${this._list}`;
view.value = this;
return view;
}
clear(prefix = '') {
for(let [key, item] of this._items.entries()) {
if(key.substr(0, prefix.length) !== prefix) continue;
if(item.node.parentNode) item.node.parentNode.removeChild(item.node);
this._items.delete(key);
}
}
_initItem(name) {
const label = htl.html`<td>${name}`;
const value = htl.html`<td>`;
const node = htl.html`<tr>${label}${value}`;
this._list.appendChild(node);
this._items.set(name, {label, value, node});
}
log(key, value) {
if(!this._items.has(key)) this._initItem(key);
return this._items.get(key).value.textContent = value;
}
}
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.