JSON.parse / JSON.stringify की मूल बातें

// Parse a JSON string back to a value
const raw = "{\"name\":\"Ayla\",\"score\":12,\"active\":true}";
const value = JSON.parse(raw);
console.log("name:", value.name, "score:", value.score);

// Replacer: filter or transform keys during stringify
const account = { id: 7, password: "secret", role: "user" };

// Hide sensitive fields
function replacer(key, value) {
  if (key === "password") return undefined; // drop it
  return value;
}

const safeJson = JSON.stringify(account, replacer, 2);
console.log("safeJson:", safeJson);

// Reviver: convert specific strings back into richer types
const orderJson = "{\"when\":\"2024-06-01T10:00:00Z\",\"total\":25}";

function reviver(key, value) {
  if (key === "when" && typeof value === "string") {
    return new Date(value); // restore Date
  }
  return value;
}

const order = JSON.parse(orderJson, reviver);
console.log("is Date?", order.when instanceof Date);
console.log("total:", order.total);