Storage

Storage determines how much a PWA can keep on device, how durable it is, and how it survives storage pressure. Offline-capable apps depend on it: Cache Storage holds the app shell and assets, IndexedDB holds structured data, and the StorageManager API governs quota and persistence.

These entries cover how much you get, how to make it persistent, what gets evicted, and how cross-site storage access works.

In this section

Persistence, quotas, and evictionStorageManager estimate() and persist(), best-effort vs persistent storage, how browsers grant it, and what gets evicted.

Planned topics

Reserved in the coverage matrix and filled in over time:

• IndexedDB
• Cache Storage
• Storage Access API

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