如何用javascript保存一个带有数组数组的对象到后退

var obj = {
  name: "John",
  age: 30,
  hobbies: ["reading", "coding", "gaming"]
};

var jsonString = JSON.stringify(obj);

sessionStorage.setItem("myObject", jsonString);

localStorage.setItem("myObject", jsonString);

var storedJsonString = sessionStorage.getItem("myObject");

var storedJsonString = localStorage.getItem("myObject");

var storedObj = JSON.parse(storedJsonString);