Use localStorage to store objects

localSstorage cannot directly store objects, and can use the conversion of json.stringify and JSON.parse to achieve the goal.

json.stringify: Convert an object to a JSON string

JSON.parse: convert a JSON string to an object

function storageObj(obj) {
    var Str = JSON.stringify(obj);   //将对象序列化
    localStorage.setItem("key", str);
};
var objBefor = {
    a:1,
    b:2
};
storageObj(objBefor);

var obj = JSON.parse(localStorage.getItem("key"));   //将JSON字符串转化为对象
console.log(obj,typeof objAfter);//{a: 1, b: 2} "object"