App Shell

Install LiamsiLab on this device

Add the test lab to your home screen for faster access and to test standalone launch, offline app shell caching, and push behavior like a real app.

Open LiamsiLab

If your browser hides the install prompt, use the browser menu and choose Install app or Add to Home Screen.

LiamsiLab

Personal PWA test lab

Launch from the home screen like a normal app.

Install prompt may live in the browser menu.

Keeps core app shell files ready for offline cold launch.

This page gives you the install button where browsers expose it. The app still has to be opened from the published HTTPS URL because install prompts and service workers do not run inside the editor preview.

iOS still requires Share → Add to Home Screen.