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HTML

<h1 style="text-align: center;">JavaScript 系列五：第5課 ── 學會 AJAX 錯誤處理</h1>
<p style="text-align: center;">為方便觀察，此作業故意將AJAX請求故意打錯API網址</p>

<button id="load">Load Products</button>
<hr>
<ul></ul>

CSS

* {
  padding: 0;
  margin: 0;
  list-style-type: none;
}

ul {
  display: flex;
  flex-wrap: wrap;
}

ul li {
  width: 25%;
  padding: 50px;
  box-sizing: border-box;
}

ul li .img-box {
  width: 100%;
  height: 200px;
}

ul li .img-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: 0.5s;
}

ul li .img-box img.active {
  transform: scale(1.25);
}

ul li .txt-box {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  height: 150px;
}

ul li .txt-box span {
  text-align: center;
  line-height: 1.5;
  font-size: 18px;
}

ul li .txt-box button {
  font-size: 16px;
  display: inline-block;
  padding: 10px 20px;
  color: #fff;
  background-color: rgba(100, 100, 255, 1);
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

#load {
  display: block;
  padding: 5px 10px;
  margin: 10px auto;
  cursor: pointer;
}

JavaScript

let loadBtn = document.querySelector("#load");
let ul = document.querySelector("ul");

load.onclick = function loading() {
  // fetch("https://fakestoreapi.com/products")
  // 為方便觀察，這邊AJAX請求故意打錯API網址
  fetch("https://fakestoreapi.com/productss")
    .then((res) => res.json())
    .then((json) => {
      for (const product of json) {
        let list = document.createElement("li");

        let imgBox = document.createElement("div");
        imgBox.classList.add("img-box");
        let txtBox = document.createElement("div");
        txtBox.classList.add("txt-box");

        let img = document.createElement("img");
        img.src = product.image;

        let productNameSpan = document.createElement("span");
        productNameSpan.textContent = product.title;

        let detailBtn = document.createElement("button");
        detailBtn.textContent = "Details";
        detailBtn.onclick = function showDetails() {
          alert(product.id);
          alert(product.category);
          alert(product.description);
        };

        ul.append(list);
        list.append(imgBox);
        list.append(txtBox);

        imgBox.append(img);

        txtBox.append(productNameSpan);
        txtBox.append(detailBtn);

        detailBtn.addEventListener("mouseover", function() {
          img.classList.add("active");
        });

        detailBtn.addEventListener("mouseout", function() {
          img.classList.remove("active");
        });
      }
    })
    .catch((error) => {
      alert("抱歉，請稍後重新嘗試。");
    });
};