【Javascript】计算器（Calculator）网页设计案例
代码如下：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>计算器</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f4f4f4;
font-family: Arial, sans-serif;
}
.calculator {
width: 300px;
background: white;
padding: 20px;
border-radius: 10px;
box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
text-align: center;
}
.screen {
width: 100%;
height: 50px;
font-size: 24px;
text-align: right;
padding: 10px;
border: none;
background: #eee;
border-radius: 5px;
margin-bottom: 10px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
button {
padding: 15px;
font-size: 18px;
border: none;
border-radius: 5px;
cursor: pointer;
transition: 0.3s;
}
.operator {
background: #ff9500;
color: white;
}
.clear {
background: #ff3b30;<