javascript - P 标签没有更新

Question

我正在尝试创建保存在本地存储中的高分。该应用程序是一个测验应用程序，它在最后保存并显示前 5 名分数(无论是否完成)。这里的问题是我在 html 文件中创建的 p 标签不会被更新我在 js 文件中创建的高分列表中的值。这是代码:

<div id = "EndSection">
<h3>The Game is Over. Top 5 Players are:</h3>
<div class = "Player">
<p id = "Player1">xoxo</p>
<p id = "Score1">30</p>
</div>

然后我只复制带有 2 个 p 标签的 div 类播放器，直到我有 5 个播放器。

javascript代码:

< function SaveToDataBase (){

//Checks if they completed the quizz, and check if there time is
//enough to be top5, if its enough, then it will run newEntry
var boolean = false;
var Trigger = "score";

HighScoreList.forEach(function(entry){

  if(entry.hasOwnProperty(Trigger)){
    var value = entry[Trigger];
    /*you look in your scores, and his total time is less than theres,  then he is
    added to the list*/
    if(thetotaltimer < value){
      boolean = true;
    }
  }
});
if(boolean){
  newEntry();
}


}


function newEntry(){
//inserts on index
HighScoreList.splice(5, 0, {name: currentPlayer, score: thetotaltimer });

//sort scores
HighScoreList.sort(function(a,b){
  return a.score - b.score;
});
//starts at index 5, then takes away the index right after it (number 6).
HighScoreList.splice(5,1);
localStorage.setItem("SavedHighListObjectz", JSON.stringify(HighScoreList));

document.getElementById("Player1").innerText = JSON.parse(HighScoreList[0].name);
document.getElementById("Score1").innerText = JSON.parse(HighScoreList[0].score);
document.getElementById("Player2").innerText = JSON.parse(HighScoreList[1].name);
document.getElementById("Score2").innerText = JSON.parse(HighScoreList[1].score);
document.getElementById("Player3").innerText = JSON.parse(HighScoreList[2].name);
document.getElementById("Score3").innerText = JSON.parse(HighScoreList[2].score);
document.getElementById("Player4").innerText = JSON.parse(HighScoreList[3].name);
document.getElementById("Score4").innerText = JSON.parse(HighScoreList[3].score);
document.getElementById("Player5").innerText = JSON.parse(HighScoreList[4].name);
document.getElementById("Score5").innerText = JSON.parse(HighScoreList[4].score);
}

function init(){

//this if-statement runs if there is no highscore list already saved
if(localStorage.getItem("SavedHighListObjectz") == undefined) {
HighScoreList = [
  {'name': "Sam", 'score': 300000},
  {'name': "Markus", 'score': 554000},
  {'name': "Cody", 'score': 2210000},
  {'name': "David", 'score': 39000000},
  {'name': "Jackson", 'score': 55500000}
];
localStorage.setItem("SavedHighList", JSON.stringify(HighScoreList));

}else{
//or else we load this
HighScoreList = JSON.parse(localStorage.getItem("SavedHighListObjectz"))
   }
  }
 init();
 questions();>

提前致谢。

Answer 1

各种小问题使您的代码无法工作:

1. 您的姓名和分数只是字符串 - 尝试对它们进行 JSON.parse 应该会导致“意外标记”异常。你没看到吗？确保您能够看到 javascript 异常(在 Chrome 中，按 F12 并单击“控制台”)

2。 localStorage.setItem("SavedHighList"应该是 localStorage.setItem("SavedHighListObjectz"。为避免此类错误，请将您的 key 保存为变量:

var storageKey="SavedHighListObjectz";
...
localStorage.getItem(storageKey)
...

3。 你只有一个玩家的 p 标签？这可能是显而易见的，但是(在你修复了#1 和#2 之后)你的示例代码将在 document.getElementById("Player2").innerText 处爆炸，直到你为其他 4 个添加 html最高分