Meccha simply IndexedDB library.
// Setup
const upgradeFn = ^^; // Upgrade Function
const dexlily = new Dexlily("MyDataBase", 1, upgradeFn);
// Store access
const store = dexlily.store("MyData")
store.set("name", "Cano"); // I'm Cano!
store.get("name"); // Oh, it's my name. Cano.
store.remove("name"); // Ah! I've lost my name.
dexlily.destroy(); // Destroy DB