Page-level data

playhtml.createPageData(name, default) creates a persistent data channel keyed by a name. No DOM element required. Good for counters, vote tallies, link trackers — anything page-shaped instead of element-shaped.

const counter = playhtml.createPageData("my-counter", { count: 0 });
counter.setData((draft) => { draft.count += 1; });
counter.onUpdate((data) => { /* re-render */ });

This page will include a working inline visit counter built with createPageData so you can see the numbers climb in real time.