一个小东西，给自己留作备份用的
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>蒲式耳, 磅 换算成公斤和吨</title>
<style>
#box1{ margin-bottom: 50px; }
.des{ font-size: 13px; color: #666; margin: 10px 0;}
</style>
</head>
<body>
<div id="box1">
<input type="text" placeholder="请输入蒲式耳" id="txt">
<button id="btn">蒲式耳转化为千克和吨</button>
<div class="des">
1蒲式耳 = 27.216公斤
</div>
<div id="content"></div>
</div>
<div>
<input type="text" placeholder="请输入磅" id="txt2">
<button id="btn2">磅转化为千克和吨</button>
<div class="des">
1磅 = 0.45359237公斤
</div>
<div id="content2"></div>
</div>
<script>
window.onload = function () {
let btn = document.getElementById('btn')
let txt = document.getElementById('txt')
let content = document.getElementById('content')
btn.onclick = function() {
let num = txt.value * 27.216
content.innerHTML = txt.value + '蒲式耳' + ' = ' + num + '公斤' + ' = ' + num * 2 + '斤' + ' = ' + num / 1000 + '吨'
}
let btn2 = document.getElementById('btn2')
let txt2 = document.getElementById('txt2')
let content2 = document.getElementById('content2')
btn2.onclick = function() {
let num = txt2.value * 0.45359237
content2.innerHTML = txt2.value + '磅' + ' = ' + num + '公斤' + ' = ' + num * 2 + '斤' + ' = ' + num / 1000 + '吨'
}
}
</script>
</body>
</html>