JavaScript 对象示例

<!DOCTYPE html>
<html>
<head>
  <title>JavaScript 对象示例</title>
</head>
<body>
  <h1>JavaScript 对象示例</h1>
  <p id="demo"></p>
  <button onclick="catEat()">吃</button>
  <button onclick="catSleep()">睡觉</button>
  <button onclick="catClimb()">爬树</button>
  <button onclick="catJump()">跳跃</button>
  <div id="output"></div>

  <script>
    const cat = {
      name: "Tom",
      age: 3,
      color: 'black',
      eat: function() {
        console.log("猫吃鱼");
        return "猫吃鱼";
      },
      sleep: function() {
        console.log("猫睡觉");