JavaScript 系列一：第7課

認識巢狀結構

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>線上下單</title>
    <link rel="stylesheet" href="./js_else_if.css">
</head>
<body>
    <div class="bk_img_container">
        <div class="bk_img">
            <img src="https://imgur.com/Y4gjfmp.jpg">
        </div>


        <div class="orderPage">
            <div class="order_input_container">

                <div class="list_items">
                    <span class="inline">
                        您好，尊姓大名？
                        <input class="input input_cust list_itms" id="customer_name" type="text"  autofocus /> 
                    </span>
                    <span class="inline">
                
                        服裝的分類： 
                        <select id="list_item_1">
                            <option value="men">男裝</option>
                            <option value="women">女裝</option>
                        </select>
                    </span>
                    <span class="inline">
                        服裝的類型：
                        <select id="list_itme_2">
                            <option value="coats">外套</option>
                            <option value="top">上衣</option>
                            <option value="bottom">下身</option>
                        </select>
                    </span>
                    <span class="inline">
                        訂購數量：
                    <input class="input list_itms" id="order_qty" type="text"/> 
                    <p class="price_bookmark">
                    ( 男裝：600元/件 ，女裝：500元/件 )</p>
                </span>
                </div>
                    
                <div class="btn_container">
                    <button class="btn btn_1" onclick="goOrder()">我要訂購</button>
                    <button class="btn btn_2" onclick="aboutMe()">認識工廠</button>
                </div>

            </div>

        
            <div...

CSS

body{
    color: #333;
    background-color: #eedada;
    font-family: OpenSansRegular, "微軟正黑體修正", "微軟正黑體", "Microsoft JhengHei", MHei, STHeitiTC-Light, sans-serif, Arial, Helvetica, "Helvetica Neue", Tahoma, Verdana;

}



.bk_img_container {
    position: relative;
    overflow-y: scroll; /* 只有垂直滾動條 */
    overflow-x: hidden; /* 隱藏水平滾動條 */
    width: 100%;
    height: 98vh; /* 占满整个视口高度 */
}

.bk_img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover; /* 铺满且不变形 */
    z-index: -1;
}

.orderPage{
    position: absolute;
    top: 20px;
    left:20px; 
    background-color:  rgba(238, 218, 218 , 50%) ;
    padding-left: 20px; 
    font-size:  1.2rem;
    color:  #653705;
}
.order_input_container{
    position: relative;
    width: 100%;
    height: 290px;

}

.list_items {
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}



.inline {
    display: inline;
    padding-top: 12px;
}

.input{
    margin-top: 6px;
    width: 150px;
    height: 30px;
    border: 1px solid #653705 ;
    background-color: white;
   
}
.input_cust:focus { 
    outline: none !important;
    border-color: #653705;
    box-shadow: 0 0 10px #653705;
 }

 select {
    font-size: 17px;
    background: rgb(101, 55, 5, 70%);
    color: #fafafa;
    width: 100px;
    height: 2em;
    padding: 6px;
    position: relative;
    border-radius: 2px;
 }
select:focus {
    border: none; 
    font-size: 20px;
}

select::after {
    font-size: 15px;
}

.price_bookmark {
    font-size: smaller;
    display: inline;
    margin:0;
    margin-right: 10px;
    color: white;
    background-color:  #653705  ;
    padding: 5px 10px;
}

.btn_container{
    margin-top: 20px;
    margin-left: 220px;
}
.btn {
    margin-right: 10px;
    font-size: 1.2rem;
    width: 150px;
    height: 50px;
    background-color: #ffeae4;
    color: #653705;
    border:0px;
    border-radius: 5px;
    cursor: pointer;
}


.btn_2{
   ...

JavaScript

function goOrder(){
    document.querySelector('.order_container').style.display = 'none';
    const custName= document.getElementById('customer_name').value;
    let order_qty = document.getElementById('order_qty').value;
    let msg = '';
    order_qty = parseInt(order_qty);
    
    if ((custName == '') || (custName == null)) {
        msg = "請輸入姓名 ！！" ;
        
        document.getElementById('customer_name').focus();
        return alert(msg);
    }

    if (isNaN(order_qty)){    
        msg = "煩請輸入訂購數量" ;
       
        document.getElementById('order_qty').focus();
        return alert(msg);
    } 
    if (order_qty < 100) {
        msg = "抱歉，我們工廠的最低出貨量是 100 件。" ;
       
        document.getElementById('order_qty').focus();
        return alert(msg);    
    }
    if (order_qty > 5000) {
        msg = "抱歉，我們工廠的最高出貨量是 5,000 件。" ;
       
        document.getElementById('order_qty').focus();
        return alert(msg);    
    }

    {

    const myMsg = '謝謝您對我們的衣服有興趣！請致電 0987-654-321，會有專人提供您報價！';
    const msg = custName + ', '+ myMsg;
    alert(msg);
    

      // show 出訂單訊息 
    document.querySelector('.order_container').style.display = 'block';
    
    document.getElementById('order_list_customer_name').textContent=custName;

    let menu_1 = document.getElementById('list_item_1');
    let menu_1_index = menu_1.selectedIndex;
    let menu_1_value = menu_1.options[menu_1_index].value;
    let menu_1_text = menu_1.options[menu_1_index].text;
    document.getElementById('order_list_item_1').textContent=menu_1_text;
    let price = 0;
    let promotion_msg = '「最近剛好是工廠週年慶，只要您今天來電下單，'
    if (menu_1_value == 'men') {
        price = 600;
        alert( promotion_msg+'我們將贈送您帥氣領帶！」');
    } 
    if  (menu_1_value == 'women'){
        price = 500;
        alert( promotion_msg+'我們將贈送您美麗圍巾！」');
    }

    let menu_2 = document.getElementById('list_itme_2');
    let menu_2_index = menu_2.selectedIndex;
    let menu_2_value = menu_2.options[menu_1_index].value;
 ...