如何使用JavaScript创建电子商务产品价格计量计算器？

分类：编程问答

如何解决如何使用JavaScript创建电子商务产品价格计量计算器？

我从一个答案中找到了这种代码格式，这是有益的。但是我需要在这里进行一些修改。我是javascript的新手，我想在这里添加一些数量范围。数量增加时，我想要不同的价格。在这里，您可以看到不同的“尺寸”和不同的“侧面和颜色”。例如：如果一个数量的常规价格为38.4美元，那么当数量为10到24时，我希望总成本应将价格计算为9.71美元/数量。怎么做呢？谢谢

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>Document</title>
</head>
<body>
  <h2>Build Your Bodycare</h2>
  <form action="insertlabel.php" id="privtelabel" method="POST">
        Size:
        <select name='product' id='product' required>
          <option value="18X24">18"X24"</option>
          <option value="12X18">12"X18"</option>
          <option value="12X24">12"X24"</option>
          <option value="16X24">16"X24"</option>
          <option value="24X24">24"X24"</option>
          <option value="24X32">24"X32"</option>
          <option value="24X36">24"X36"</option>
          <option value="24X48">24"X48"</option>
        </select>
    
        <br><br> Quantity: <input type="text" name="quantity" id='quantity' required> 
        <br><br>Side & Color:
        <select name='size' id='size' required>
          <option value="1-Side 1-Color">1-Side 1-Color</option>
          <option value="1-Side 2-Color">1-Side 2-Color</option>
          <option value="2-Side 1-Color">2-Side 1-Color</option>
          <option value="2-Side 2-Color">2-Side 2-Color</option>
          <option value="1-Side Full-Color">1-Side Full-Color</option>
          <option value="1-Side Full-Color">1-Side Full-Color</option>
        </select>
        
        <p>(Sizes are only for soaps.)</p>
        Price: <span id="totalCost"></span>

    </form>

    <script>
        //Store some references to our DOM elements
        var productEl = document.querySelector('#product');
        var quantityEl = document.querySelector('#quantity');
        var sizeEl = document.querySelector('#size');
        var totalCostEl = document.querySelector('#totalCost');

        //Add the change event handlers on the applicable elements
        productEl.addEventListener('change',calculateTotal);
        quantityEl.addEventListener('change',calculateTotal);
        sizeEl.addEventListener('change',calculateTotal);

        //Store your data in an object literal (essentially creating a map)
        var product_price = {}; //Noticed I replaced the [] with {}
        product_price['18X24'] = 5;
        product_price['12X18'] = 6;
        product_price['12X24'] = 6;
        product_price['16X24'] = 7;
        product_price['24X24'] = 8;
        product_price['24X32'] = 8;
        product_price['24X36'] = 10;
        product_price['24X48'] = 15;

        var size_price = {};   //Noticed I replaced the [] with {}
        size_price['1-Side 1-Color'] = 0;
        size_price['1-Side 2-Color'] = 2;
        size_price['2-Side 1-Color'] = 3;
        size_price['2-Side 2-Color'] = 5;
        size_price['1-Side Full-Color'] = 5;
        size_price['2-Side Full-Color'] = 5;


        //Here's our single event handler - called when any of the 3 elements fire a 'change' event
        function calculateTotal() {
        //console.log()
        var unitCost = product_price[productEl.value];
        var additionalCost = size_price[sizeEl.value] || 0;
        var qty = quantityEl.value || 0;

        totalCostEl.textContent = `Total cost: $${(unitCost * qty) + additionalCost}`;
        }
    </script>
   
</body>
</html>

解决方法

我已经改变了我的解决方案。我将其变成{0-10: 6,10-24: 7}而不是{9 : 6,24 : 7 }。所以我可以检查数量。我添加了一条if else语句，但是对于所有不同的范围，它很容易变成switch语句。我刚刚添加了前两个范围。

//Store some references to our DOM elements
var productEl = document.querySelector('#product');
var quantityEl = document.querySelector('#quantity');
var sizeEl = document.querySelector('#size');
var totalCostEl = document.querySelector('#totalCost');

//Add the change event handlers on the applicable elements
productEl.addEventListener('change',calculateTotal);
quantityEl.addEventListener('change',calculateTotal);
sizeEl.addEventListener('change',calculateTotal);

//Store your data in an object literal (essentially creating a map)
var product_price = {}; //Noticed I replaced the [] with {}
product_price['18X24'] = {
  9: 5,24: 6
};
product_price['12X18'] = {
  9: 6,24: 8.24
};
product_price['12X24'] = {
  9: 6,24: 7.45
};
product_price['16X24'] = {
  9: 7,24: 8.14
};
product_price['24X24'] = {
  9: 8,24: 9.24
};
product_price['24X32'] = {
  9: 8,24: 10.99
};
product_price['24X36'] = {
  9: 10,24: 11.99
};
product_price['24X48'] = {
  9: 15,24: 17.00
};

var size_price = {}; //Noticed I replaced the [] with {}
size_price['1-Side 1-Color'] = 0;
size_price['1-Side 2-Color'] = 2;
size_price['2-Side 1-Color'] = 3;
size_price['2-Side 2-Color'] = 5;
size_price['1-Side Full-Color'] = 5;
size_price['2-Side Full-Color'] = 5;


//Here's our single event handler - called when any of the 3 elements fire a 'change' event
function calculateTotal() {
  //console.log()


  var additionalCost = size_price[sizeEl.value] || 0;
  var qty = quantityEl.value || 0;

  var price;

  if (qty < 10) {
    price = product_price[productEl.value][9]
  } else if (qty >= 10) {
    price = product_price[productEl.value][24]
  }

  totalCostEl.textContent = `Total cost: $${(price * qty) + additionalCost}`;
}
<h2>Build Your Bodycare</h2>
<form action="insertlabel.php" id="privtelabel" method="POST">
  Size:
  <select name='product' id='product' required>
    <option value="18X24">18"X24"</option>
    <option value="12X18">12"X18"</option>
    <option value="12X24">12"X24"</option>
    <option value="16X24">16"X24"</option>
    <option value="24X24">24"X24"</option>
    <option value="24X32">24"X32"</option>
    <option value="24X36">24"X36"</option>
    <option value="24X48">24"X48"</option>
  </select>

  <br><br> Quantity: <input type="text" name="quantity" id='quantity' required>
  <br><br>Side & Color:
  <select name='size' id='size' required>
    <option value="1-Side 1-Color">1-Side 1-Color</option>
    <option value="1-Side 2-Color">1-Side 2-Color</option>
    <option value="2-Side 1-Color">2-Side 1-Color</option>
    <option value="2-Side 2-Color">2-Side 2-Color</option>
    <option value="1-Side Full-Color">1-Side Full-Color</option>
    <option value="1-Side Full-Color">1-Side Full-Color</option>
  </select>

  <p>(Sizes are only for soaps.)</p>
  Price: <span id="totalCost"></span>

</form>

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。

相关推荐

导入项目后报错问题
依赖报错 idea导入项目后依赖报错，解决方案：https://blog.csdn.net/weixin_42420249/article/details/81191861 依赖版本报错：更换其他版本 无法下载依赖可参考：https://blog.csdn.net/weixin_42628809/a
idea不能识别yaml文件
使用mybatis plus常见错误
错误1：代码生成器依赖和mybatis依赖冲突 启动项目时报错如下 2021-12-03 13:33:33.927 ERROR 7228 [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPL
gradle常见问题与错误
错误1：gradle项目控制台输出为乱码 # 解决方案：https://blog.csdn.net/weixin_43501566/article/details/112482302 # 在gradle-wrapper.properties 添加以下内容 org.gradle.jvmargs=-Df
Mybatis Plus传入参数0不起作用
错误还原：在查询的过程中，传入的workType为0时，该条件不起作用 &lt;select id=&quot;xxx&quot;&gt; SELECT di.id, di.name, di.work_type, di.updated... &lt;where&gt; &lt;if test=&qu
linux中make编译源码包失败
报错如下，gcc版本太低 ^ server.c:5346:31: 错误：‘struct redisServer’没有名为‘server_cpulist’的成员 redisSetCpuAffinity(server.server_cpulist); ^ server.c: 在函数‘hasActiveC
微服务启动错误：Command line is too long. Shorten command line for
解决方案1 1、改项目中.idea/workspace.xml配置文件，增加dynamic.classpath参数 2、搜索PropertiesComponent，添加如下 &lt;property name=&quot;dynamic.classpath&quot; value=&quot;tru
vue常见错误
删除根组件app.vue中的默认代码后报错：Module Error (from ./node_modules/eslint-loader/index.js): 解决方案：关闭ESlint代码检测，在项目根目录创建vue.config.js，在文件中添加 module.exports = { lin
spark常见错误
查看spark默认的python版本 [root@master day27]# pyspark /home/software/spark-2.3.4-bin-hadoop2.7/conf/spark-env.sh: line 2: /usr/local/hadoop/bin/hadoop: No s
matplotlib报错：AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'. Did you mean: 'FigureCanvasAgg'?
使用本地python环境可以成功执行 import pandas as pd import matplotlib.pyplot as plt # 设置字体 plt.rcParams[&#39;font.sans-serif&#39;] = [&#39;SimHei&#39;] # 能正确显示负号 p
gitlab登录失败，报错：This challenge page was accidentally cached by an intermediary and is no longer available.
设置时间 控制面板
后端开发常见错误
错误1：Request method ‘DELETE‘ not supported 错误还原：controller层有一个接口，访问该接口时报错：Request method ‘DELETE‘ not supported 错误原因：没有接收到前端传入的参数，修改为如下 参考 错误2：cannot r
docker常见错误
错误1：启动docker镜像时报错：Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen 解决方法：重启docker -&gt; systemctl r
idea常见错误
错误1：private field ‘xxx‘ is never assigned 按Altʾnter快捷键，选择第2项 参考：https://blog.csdn.net/shi_hong_fei_hei/article/details/88814070 错误2：启动时报错，不能找到主启动类 #
pip安装依赖失败
报错如下，通过源不能下载，最后警告pip需升级版本 Requirement already satisfied: pip in c:\users\ychen\appdata\local\programs\python\python310\lib\site-packages (22.0.4) Coll
maven常见错误
错误1：maven打包报错 错误还原：使用maven打包项目时报错如下 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources)
cloud项目中常见错误
错误1：服务调用时报错 服务消费者模块assess通过openFeign调用服务提供者模块hires 如下为服务提供者模块hires的控制层接口 @RestController @RequestMapping(&quot;/hires&quot;) public class FeignControl
springboot常见错误
错误1：运行项目后报如下错误 解决方案 报错2：Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project sb 解决方案：在pom.
springmvc拦截器中使用redisTemplate报空指针异常
参考 错误原因 过滤器或拦截器在生效时，redisTemplate还没有注入 解决方案：在注入容器时就生效 @Component //项目运行时就注入Spring容器 public class RedisBean { @Resource private RedisTemplate&lt;String
vite报错：npm ERR! command C:WINDOWSsystem32cmd.exe /d /s /c C:UsersychenAppDataLocalTempnpx-dde1c848.cmd
使用vite构建项目报错 C:\Users\ychen\work&gt;npm init @vitejs/app @vitejs/create-app is deprecated, use npm init vite instead C:\Users\ychen\AppData\Local\npm-
pythonJavaScriptjavaHTMLPHPreactjsC#AndroidCSSNode.jssqlrpython-3.xMysqLjQueryc++pandasFlutterangularIOSdjangolinuxswifttypescript路由器JSON路由器设置无线路由器h3c华三华三路由器设置华三路由器电脑软件教程arraysdocker软件图文教程Cvue.jslaravelspring-boot