js swich
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>同志交友</title>
<style>
input {
width: 300px;
padding: 10px;
font-size: 16px;
border: 1px solid #ccc;
}
button {
padding: 10px 20px;
border: 1px solid #ccc;
background: #f5f5f5;
}
#res {
margin-top:20px;
width: 300px;
min-height: 100px;
padding: 10px;
border:1px solid #ccc;
}
</style>
</head>
<body>
<h1>同志交友</h1>
<hr>
<h3>请输入您的生日：</h3>
<input type="date" id="yearInput">
<button onclick="makeFn()">提交</button>
<div id="res"></div>
<script>
//声明函数
function makeFn() {
//获取用户输入的日期
var date = document.getElementById('yearInput').value;
//从日期中获取年 并且转换为Number
var year = Number(date.split('-')[0]);
//判断
var animal = '';
switch (year % 12) {
case 0: animal = '猴'; break;
case 1: animal = '鸡'; break;
case 2: animal = '狗'; break;
case 3: animal = '猪'; break;
case 4: animal = '鼠'; break;
case 5: animal = '牛'; break;
case 6: animal = '虎'; break;
case 7: animal = '兔'; break;
case 8: animal = '龙'; break;
case 9: animal = '蛇'; break;
case 10: animal = '马'; break;
case 11: animal = '羊'; break;
default: animal = '驴'; //前面的条件都不满足
}
//把结果显示到页面中
document.getElementById('res').innerHTML = '您的生肖是： '+animal;
/*
year % 12 -- 0 ~ 11
鼠 4 2008 奥运会 + 12 （2020）
牛 5 2009
虎 6 2010
兔 7
龙 8
蛇 9
马 10
羊 11
猴 0
鸡 1
狗 2
猪 3
*/
}
//console.log(2020 % 12)
</script>
</body>
</html>
