Browser storage

What you'll learn

• What each storage API actually guarantees and where it falls short
• Cookies — flags, scope, and the security ones that matter
• localStorage and sessionStorage, including the gotchas
• IndexedDB without the boilerplate panic
• The Cache API and how it pairs with service workers
• Quotas, eviction, and storage partitioning in 2026

1. 01
   The storage landscape

   Five APIs, one job — when each fits, in one diagram.
   12 min
2. 02
   Cookies

   Anatomy, attributes, and the flags that aren't optional.
   14 min
3. 03
   localStorage and sessionStorage

   Sync, scope, quotas, and the JSON dance.
   13 min
4. 04
   Why IndexedDB exists

   What localStorage can't do — and when you cross the line.
   13 min
5. 05
   Working with IndexedDB

   Transactions, schemas, and the promise wrapper that hides the worst of it.
   16 min
6. 06
   The Cache API

   Request/response storage — the service worker companion.
   13 min
7. 07
   Quotas and eviction

   How much you actually get, and when the browser takes it back.
   12 min
8. 08
   Storage and privacy

   Partitioning, third-party cookies, and what 'persistent' really buys.
   14 min
9. 09
   Choosing the right tool

   A decision tree for the next thing you're tempted to put in localStorage.
   11 min
10. 10
    Debugging storage

    DevTools Application panel — what each row is telling you.
    12 min