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Neuer Programmierer hier. Ich erstelle eine Pizza-Menü-App, die die den oberen Schaltflächen zugewiesenen Werte addiert und sie als „Summe“ am Ende der Liste anzeigt. Aber ich habe Probleme, den Code dazu zu bringen, die Kosten beim Hinzufügen von Zutaten anzuzeigen.
Das habe ich versucht:
let whiteWheat = document.getElementById("white-wheat"); let multiGrain = document.getElementById("multi-grain"); let caulifl = document.getElementById("cauliflower"); let thinCrust = document.getElementById("thin-crust"); let deepDish = document.getElementById("deep-dish"); let totalField = document.getElementById("total"); totalField = 0; whiteWheat.addEventListener(click, function() { var totalCost = totalField + 10; var finalOrder = document.createElement("li"); finalOrder.innerText = totalCost.value; totalField.appendChild(finalOrder); });
<h1>PIZZA SUPREME</h1> <h2>Select a crust and toppings to build your own pizza!</h2> <h3>Crust</h3> <h4> per crust.</h4> <ul><button id="white-wheat">white wheat</button></ul> <ul><button id="multi-grain">multigrain</button></ul> <ul><button id="cauliflower">Cauliflower</button></ul> <ul><button id="thin-crust">Thin Crust</button></ul> <ul><button id="deep-dish">Deep Dish</button></ul> <h2>Total:</h2> <div id="total"> </div>
P粉4097421422024-04-03 18:37:03
PIZZA SUPREME
Select a crust and toppings to build your own pizza!
Crust
$10 per crust.
P粉6499901632024-04-03 16:49:54
更好的方法可能是在按钮上创建 x-price
属性并将它们放入 x-price
属性的值。像这样:
let totalPrice = 0;
const totalDiv = document.getElementById('total');
const itemsDiv = document.getElementById('items');
document.getElementById('buttons').addEventListener('click', e => {
totalPrice += parseFloat(e.target.getAttribute('x-price'));
totalDiv.textContent = totalPrice;
const li = document.createElement('li');
li.textContent = e.target.textContent;
itemsDiv.appendChild(li);
});
PIZZA SUPREME
Select a crust and toppings to build your own pizza!
Crust
Total: