🗄️ Storage the browser is a database server

"Web pages can't keep data." Sure — except for the transactional database, the private filesystem, and the multi-gigabyte quota every origin gets.

Your quota, right now

navigator.storage.estimate() — how much this one little demo site is allowed to store on your machine:

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IndexedDB: notes that survive

A real transactional database with indexes and cursors. Add notes, then close the tab, reopen, they're still here. (This powers offline mail clients and Figma's local cache.)

Origin Private File System

A private, sandboxed filesystem per site — synchronous-speed file I/O without any permission prompt (nothing here touches your real files; see the Real Files exhibit for that).

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