[英]I have a problem with JavaScript onClick function
我已經開始做一個游戲,有點類似於“花比爾蓋茨的錢”,但我說過要稍微改變一下。 我已經完成了第一項,並且我嘗試用 JS 對其進行編輯,因此每次您按“購買”時,它都會從您身上扣除 1 美元,或者,當您按“出售”時,您將得到 1 美元。 問題是,每次我點擊,它只計算一次。 另外,如果我按“買入”,然后按“賣出”,它會立即給我 11 美元,而不是 10 美元。 文件名:index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width = device-width, initial-scale = 1.0">
<link href="https://fonts.googleapis.com/css?family=Roboto+Slab&display=swap" rel="stylesheet">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<title>Spend you own money</title>
<script src="script.js">
</script>
<link rel="stylesheet" href="style.css">
<body>
<noscript>You need to enable javascript in order to have fun!</noscript>
<h1 class="center" id = "money">Money Left: 10</h1><!--Money = 100 000 000 000-->
<div class= "main">
<div class="pen">
<h2>Pen</h2>
<input type="submit" class="sell" value="Sell" onclick="sellpen()">
<!-- <input type="text" class="amount" value = 0 id = "amountpen" readonly="readonly" size="9%"> -->
<input type="submit" class="buy" value="Buy" onclick="amountpen()" >
</div>
</div>
</body>
</head>
</html>
文件名:script.js
var money = 10; //dollars
var pen = 1; // dollar
var mpen = money-pen;
var ppen = money+pen;
function amountpen() {
document.getElementById("money").innerHTML = "Money Left: " + mpen;
money = money-1;
}
function sellpen() {
document.getElementById("money").innerHTML = "Money Left: " +ppen;
money = money+
你的 script.js 應該是這樣的:
var money = 10;
var pen = 1;
function amountpen() {
var mpen = money-pen;
document.getElementById("money").innerHTML = "Money Left: " + mpen;
money = money-1;
}
function sellpen() {
var ppen = money+pen;
document.getElementById("money").innerHTML = "Money Left: " +ppen;
money = money+1;
}
您可以嘗試使用此 JS 代碼:
money = 10; //dollars
function amountpen() {
money--;
document.getElementById("money").innerHTML = "Money Left: " + money;
}
function sellpen() {
money++;
document.getElementById("money").innerHTML = "Money Left: " +money;
}
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