# Quality

- Every request for `c/{id}.js` counts as a page load on the owner's plan. Never load your own
  script again from JS.
- Your code ships exactly as saved; nothing minifies it. Keep it small.
- Fetch once per page, shared by every mount:
  `const data = (window.__sbFetch ||= {})[url] ||= fetchAll(url);`
- Headings in the mount start at `h2` or `h3`, fitting the section they sit in.
- A countdown or ticking clock gets a text label and no `aria-live`; announcing every second
  drowns a screen reader. Changing content (filter results) can use `aria-live="polite"`.
- Images from the owner's content use its alt text; decorative ones get `alt=""`.