css 需要帮助运行一个循环通过数组(对象)/添加了HTML

rwqw0loc 于 2023-04-23 发布在其他

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我如何通过一个对象数组运行一个简单的循环，以检查先前从表单中提取的值的相似性。我正在做一个项目，其中我正在建立一个比萨饼店。用户将在表单中输入所需的比萨饼大小和浇头。然后我将提取total的值。
这是我用来从表单中提取值的JavaScript代码：

let form=document.querySelector("form");
form.addEventListener("submit",(event)=>{
event.preventDefault();
// run an array through the checkbox
let topping=[];
document.querySelectorAll('[type="checkbox"]').forEach(item=>{
if (item.checked=== true)
{
topping.push(item.value);
}})
let pizzaSze=[
{size: "8 inch",cost: 8},
{size: "10 inch", cost:10},
{size: "12 inch", cost:12},
{size:"14 inch", cost:14},
];
let top=[
{type:"sausage", cost:1},
{type:"pepperoni", cost:1},
{type:"ham", cost:1},
{type:"chicken", cost:1},
{type:"onions", cost:1},
{type:"greenpeppers", cost:1},
];


//to extract the value of the text field:
let fullname=document.querySelector("#fullname").value;
let address=document.querySelector("#address").value;
let pies=document.querySelector("#pies").value;
let

pizzasize=document.querySelector（'input [name=“size”]：checked'）.value;
下面是HTML：

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Pizza Assignment</title>
</head>
<body>
<h>Pizza Perfect</h>
<br/><br/>
<form>
    <label for="fullname">Please Enter Your First Name:</label>
    <input type="text" required id="fullname" size="20" 
    name="fullname">
    <br/> <br/>
   
    <label for="address">Please Enter Your Address:</label>
    <input type="text" required id="address" size="20" 
    name="address">
    <br/> <br/>
   
    <label for="pies">Please Enter Number Of Pies:</label>
    <input type="number" required id="pies" size="20" 
     name="pies">
    <br/><br/>
    
    <p>Please Enter Size:</p>
    <input type="radio" id="8 inch" name="size" value="8 inch">
    <label for="8 inch">8 inch</label>
    <br/>
    <input type="radio" id="10 inch" name="size" value="10 inch">
    <label for="10 inch">10 inch</label>
    <br/>
    <input type="radio" id="12 inch" name="size" value="12 inch">
    <label for="12 inch">12 inch</label>
    <br/>
    <input type="radio" id="14 inch" name="size" value="14 inch">
    <label for="14 inch">14 inch</label>
    <br/><br/>
    <p>Toppings:</p>
    <input type="checkbox" id="pepperoni" name="topping" 
    value="pepperoni">
    <label for="pepperoni">Pepperoni</label>
    <br/>
    <input type="checkbox" id="sausage" name="topping" 
    value="sausage">
    <label for="sausage">Sausage</label>
    <br/>
    <input type="checkbox" id="ham" name="topping" value="ham">
    <label for="ham">Ham</label>
    <br/>
    <input type="checkbox" id="chicken" name="topping" 
    value="chicken">
    <label for="chicken">Chicken</label>
    <br/>
    <input type="checkbox" id="onions" name="topping" 
    value="onions">
    <label for="onions">Onions</label>
    <br/>
    <input type="checkbox" id="greenpeppers" name="topping" 
    value="greenpeppers">
    <label for="greenpeppers">Green Peppers</label>
    
        <br/><br/>
    <button type="submit">Submit Order</button>
    <button type="reset">Reset</button>
    </form>

css

来源：https://stackoverflow.com/questions/76037476/need-help-running-a-loop-through-an-array-object-added-the-html

2条答案

按热度按时间

6l7fqoea1#

你试过使用for循环吗？
例如：

for (let i = 0; i < toppings.length; i++) {
    // calculate topping price
    // get current topping "value" with
    // toppings[i]
}

这允许您循环遍历数组中的所有项目，并根据浇头确定您的总价。

赞(0）回复(0）举报 2023-04-23

daupos2t2#

可以使用for或forEach循环：
for：

var totalCost = 0;
for (let i = 0; i < pizzas.length; i++) {
    totalCost += pizzas[i]["cost"]; // Add the cost of the pizza to the total price
}
// Do anything you want with totalCost here

forEach：

var totalCost = 0;
pizzas.forEach(pizza => {
    totalCost += pizza["cost"]; // Add the cost of the pizza to the total price
});
// Do anything you want with totalCost here

你使用的是一个关联数组，其中每个键对应一个值，所以，为了访问你需要的值，你只需要在括号中指明你的键。然后你只需要在循环中进行你需要的计算。

赞(0）回复(0）举报 2023-04-23

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css 需要帮助运行一个循环通过数组(对象)/添加了HTML

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