Dev Guide
Web APIs
Browser and network APIs every web app relies on.
1
localStorage
Persistent, synchronous key-value storage built into every browser.
9 min read
2
sessionStorage
The exact same API as localStorage — scoped to one tab, gone the moment that tab closes.
6 min read
3
HTTP Cookies
The original client-side storage — small, automatically sent with every request, and still how a stateless protocol remembers you.
8 min read
4
IndexedDB
The browser's built-in asynchronous, transactional database — for when localStorage's limits become a real problem.
8 min read
5
OPFS & WASM-SQLite
The browser's native file-system access API — and how it makes a real SQLite database possible entirely client-side.
7 min read