JS Localstorage Sessionstorage

Ringkasan

Web Storage menyimpan data key-value di browser. localStorage persisten; sessionStorage per-tab.

Konsep Dasar

• setItem(k,v), getItem(k), removeItem(k), clear(), key(i).
• Hanya string — JSON.stringify/parse untuk objek.
• localStorage bertahan setelah tutup tab; sessionStorage hilang saat tab tutup.
• Kuota ~5MB, synchronous (block main thread bila besar).

Cara Kerja / Struktur

js

localStorage.setItem("user", JSON.stringify({id:1}));
const u = JSON.parse(localStorage.getItem(