1. 某店实行优惠活动,消费50元以上按八折优惠,试给出用户结算界面,要求:
提示用户输入消费金额:如果消费50元以上按照八折优惠结算,否则按照实际消费结算。
(注:界面样式如图《制作题-1.jpg》所示, 文件名:index_1.html)
代码:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
请输入消费金额:
<br>
<input type="number" id="input">
<br>
<br>
<input type="button" onclick="sub()" value="结算">
<script>
var sub = function(e) {
var money = document.getElementById("input").value
console.log(money)
if (!/^\d+\.?\d*$/.test(money)) {
return alert('请输入正确的数字')
}
if (money > 50) {
money = money * .8
}
alert('本次消费金额:' + money + '元')
}
</script>
</body>
</html>