Sorts products by price in ascending or descending order

HTML

<!DOCTYPE html>
<html lang="zh-Hant">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>商品列表 - 版本7 進階排序</title>
<link href="https://cdn.jsdelivr.net/npm/daisyui@4.12.10/dist/full.min.css" rel="stylesheet" type="text/css" />
<script src="https://cdn.tailwindcss.com"></script>
</head>
<body class="p-6 bg-gray-100">

<h1 class="text-2xl font-bold mb-4">商品排序</h1>
<div class="mb-4 space-x-2">
  <button id="ascBtn" class="btn btn-accent">價格升序</button>
  <button id="descBtn" class="btn btn-accent">價格降序</button>
</div>

<div id="productList" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6"></div>

<script>
const products = [
  { name: "可樂", price: 35, desc: "經典汽水", img: "https://picsum.photos/300/200?41" },
  { name: "果汁", price: 25, desc: "天然水果", img: "https://picsum.photos/300/200?42" },
  { name: "礦泉水", price: 15, desc: "清涼解渴", img: "https://picsum.photos/300/200?43" },
];

const container = document.getElementById("productList");
const ascBtn = document.getElementById("ascBtn");
const descBtn = document.getElementById("descBtn");

function render(list){
  container.innerHTML = "";
  for(let i=0;i<list.length;i++){
    const p = list[i];
    container.innerHTML += `
      <div class="card bg-base-100 shadow-xl">
        <figure><img src="${p.img}" alt="${p.name}"></figure>
        <div class="card-body">
          <h2 class="card-title">${p.name}</h2>
          <p>${p.desc}</p>
          <p class="text-red-500 font-bold">價格：${p.price} 元</p>
        </div>
      </div>
    `;
  }
}

// 初始顯示
render(products);

// ✅ 升序
ascBtn.addEventListener("click", function(){
  // sort 會直接改變原陣列
  products.sort(function(a,b){ return a.price - b.price });
  render(products);
});

// ✅ 降序
descBtn.addEventListener("click", function(){
  products.sort(function(a,b){ return b.price - a.price });
  render(products);
});
</script>

</body>
</html>