Uncaught TypeError：Can not read property'addEventListener'of null]时，我按照freecodecamp.org的课程尝试创建基本的Rock，Paper Scissors游戏。 起初，我以为是因为DOM加载不正确，因为我将其放在head标签而不是body标签的底部，但是当我更改它时，它只能播放一次，然后它发送给我同样的错误。
我不知道如何解决。我共享了html和JS。
HTML：
<!DOCTYPE html>
<html>
<head>
<title>Rock, Paper, Scissors</title>
<link rel="stylesheet" type="text/css" href="styles/main.css">
<script src="https://kit.fontawesome.com/8192e1e51b.js" crossorigin="anonymous"></script>
<link href="https://fonts.googleapis.com/css2?family=Rubik:wght@300;400&display=swap" rel="stylesheet">
</head>
<body>
<header class="header">
<h1>Rock Paper Scissors</h1>
</header>
<div class="score-board">
<div id="user-badge" class="badge">User</div>
<div id="robot-badge" class="badge">Robot</div>
<span class="score-numbers">0</span>:<span class="score-numbers">0</span>
</div>
<div class="result"><p>Paper covers Rock.<br>You Win!</p></div>
<div class="choices">
<div id="rock" class="choice"><i class="far fa-hand-rock"></i></div>
<div id="paper" class="choice"><i class="far fa-hand-spock"></i></div>
<div id="scissors" class="choice"><i class="far fa-hand-scissors"></i></div>
</div>
<p class="move-message">Make your move</p>
</div>
<script type="text/javascript" src="scripts/main.js"></script>
</body>
</html>
JavaScript：
const userScore = 0;
const robotScore = 0;
const userScore_span = document.getElementById("user-badge");
const robotScore_span = document.getElementById("robot-badge");
const scoreBoard_div = document.querySelector(".score-board");
const result_div = document.querySelector(".result");
const rock_div = document.getElementById("r");
const paper_div = document.getElementById("p");
const scissors_div = document.getElementById("s");
rock_div.addEventListener("click", function(){
alert("rock");
game("r");
})
paper_div.addEventListener("click", function(){
alert("paper");
game("p");
})
scissors_div.addEventListener("click", function(){
alert("scissors");
game("s");
})
当我偶然发现Uncaught TypeError：无法读取null的属性'addEventListener'时，我尝试按照freecodecamp.org课程创建一个基本的Rock，Paper Scissors游戏。首先我...