为什么 {highscorelist} 没有价值？

问题描述

const HIGHscoreKEY = "highscore";

highscorelist = localStorage.getItem(HIGHscoreKEY);
if(highscorelist){
    highscorelist = {
        one: {navn: "AAA",score: 0},two: {navn: "AAA",three: {navn: "AAA",score: 0}
    };
    localStorage.setItem(HIGHscoreKEY,JSON.stringify(highscorelist));
};

这是它的代码，当我尝试执行“highscorelist.one.score”时，它说：“Uncaught TypeError: Cannot read property 'one' of null”

解决方法

localStorage.setItem(HIGHSCOREKEY,JSON.stringify(highscorelist)); 等价于 localStorage.setItem(HIGHSCOREKEY,highscorelist);，因为 localStorage 将以字符串的形式存储。

所以在检索数据时做

highscorelist = JSON.parse(localStorage.getItem(HIGHSCOREKEY));