Sharedarraybuffer Gallery View

• Are they using Client View (CDN) or Component View (npm)?
• Is the app served over HTTPS?
• Does the browser report crossOriginIsolated === true?

Symptoms

• “SharedArrayBuffer is not defined”
• “Your browser doesn’t support gallery view”
• performance degradation on certain machines/browsers

What to Do

1. Serve the app with the required COOP/COEP headers so crossOriginIsolated can become true.
2. Avoid embedding the app in contexts that break isolation (some iframes/proxies).
3. If the environment cannot be isolated (enterprise proxy, incompatible embeds), treat gallery view / HD features as best-effort and fall back gracefully.

Debug Checklist

• In DevTools console:
  • window.crossOriginIsolated should be true for SAB-dependent features.
• Verify required headers are present on all relevant responses (HTML + JS + WASM).