The plain-English version
Facilities such as localStorage and IndexedDB for data in a browser.
Why it matters
Storage can be cleared and usually does not synchronize across devices by itself.
You might also hear
- localStorage
- IndexedDB
- persistence
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: Browser-scoped persistence is distinguished from shared storage and is not presented as a backup guarantee.