JavaScript 系列五：第5課

── 學會 AJAX 錯誤處理

by applelily

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript 系列五：第5課 ── 學會 AJAX 錯誤處理</title>
    <link rel="stylesheet" href="./04_js_AJAX-error.css">
</head>
<body>
    <div class="container">
        <button id="load_products_btn" class="btn">Load Products</button>
         <div class="msg">抱歉，請稍後重新嘗試</div>

    </div>

    <hr>

    <div class="container">
        <ul id="products_lists" class="products_lists">
    

        </ul>
    </div>


    <script src="./04_js_AJAX-error.js"></script>
</body>
</html>

CSS

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

body {
    box-sizing: border-box;
}

#load_products_btn{
    width: 120px;
    height: 80px;
    color: #ccc;
    background-color:rgb(8, 81, 81);
    font-size: 20px; 
    padding: 10px; 
    margin: 20px 30px; 
}


#load_products_btn:hover ,#products_lists button:hover{
    color:rgb(8, 81, 81); 
    background-color:rgb(156, 176, 20); 
    cursor : pointer;  
}


.msg {
    position: absolute;
    top: 20px;
    width: 200px;
    height: 30px;
    display: none;
    background-color: #EDCAC7;
    color:  #902105;
    padding: 10px;
    margin: 20px 0;
    border-radius: 5px;

}

.msg{
    animation: my_message 5s;
    opacity:0;
}

@keyframes my_message{
    from {
        left: 200px; opacity: 100;}
    to{ left: 300px;
        opacity: 0;}

} 


#load_products_btn:hover ,#products_lists button:hover{
    color:rgb(8, 81, 81); 
    background-color:rgb(156, 176, 20); 
    cursor : pointer;  
}


#products_lists {
    display: flex; /* Change to flex to enable horizontal layout */
    flex-wrap: wrap; /* Allow items to wrap to the next row if needed */
    justify-content: space-between; /* Distribute items evenly */
    padding: 20px; 
} 

#products_lists li {
    width: 200px; /* Adjust width to control how many items per row */
    margin: 10px; /* Add margin to space out items */
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

#products_lists span {
    text-align: center;
    color: rgb(100, 100, 100);
    margin-bottom: 10px; /* Add some space below the text */
}

#products_lists button {
    width: 100px;
    padding: 5px;
    margin-top: 10px; 
    color:rgb(238, 245, 245);
    background-color:rgb(69, 69, 68); 
    border-radius: 5px;
}


#products_lists img {
    width: 100px;
    height: 100px;
    object-fit: contain;
   ...

JavaScript

const load_products_btn = document.querySelector('#load_products_btn');

function set_display_timeout(in_elem){
    in_elem.style.display="block";
    setTimeout(function(){
        in_elem.style.display="none";
    },5000)

}
const loadproducts = () => {
    const products_lists = document.querySelector('#products_lists');
    products_lists.innerHTML = ''; // Clear the list before loading new products
    const msg = document.querySelector('.msg');
    msg.style.display='none'; 
    fetch('https://fakestoreapi.com/products1')
        .then(res => res.json())
        .then(json => {
            console.log(json);

            json.forEach(product => {
                const li = document.createElement('li');
                
    
                const img = document.createElement('img');
                img.src = product.image;
                img.alt = product.title;  
                
                li.appendChild(img);
                const span = document.createElement('span');
                span.textContent = product.title;
                li.appendChild(span);
                
                const btn = document.createElement('button');
                btn.textContent = 'Details';

                li.appendChild(btn);
                btn.onclick = () => {
                    alert(`ID: ${product.id}\nCategory: ${product.category}\nDescription: ${product.description}`);
                }
                
                products_lists.appendChild(li);
            });
        })
        .catch(error => {
            msg.style.display='block';
            set_display_timeout(msg);
            console.error('Error fetching products:', error);
        });
}

load_products_btn.onclick = loadproducts;