localStorage usage in unsupported environments

[WarningImHack3r]

Describe the bug

Mirror of svecosystem/mode-watcher#166

Reproduction

Any usage of the lib within a site when the browser setting for persistent storage is disabled, like Svelte Playground

Logs

Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.

System Info

N/A

Severity

annoyance