好看的前端计算器代码分享（html+css+js制作计算器）
简介：这里分享的html+css+js制作的几个计算器代码。
第一个
demo演示
<!DOCTYPE html>
<html>
<head>
<title>计算器</title>
<style type="text/css">
body {
background-color: #F5F5F5;
font-family: Arial, sans-serif;
}
h1 {
text-align: center;
margin-top: 50px;
}
.container {
width: 300px;
margin: 0 auto;
background-color: #FFFFFF;
padding: 20px;
border-radius: 10px;
box-shadow: 0px 0px 10px #888888;
}
input[type="button"] {
background-color: #4CAF50;
color: #FFFFFF;
border: none;
padding: 10px;
width: 100%;
margin-bottom: 5px;
cursor: pointer;
border-radius: 5px;
}
input[type="text"] {
width: 100%;
padding: 10px;
border-radius: 5px;
border: 1px solid #CCCCCC;
margin-bottom: 10px;
}
</style>
</head>
<body>
<h1>前端计算器</h1>
<div class="container">
<input type="text" id="display" readonly>
<input type="button" value="1" onclick="addToDisplay('1')">
<input type="button" value="2" onclick="addToDisplay('2')">
<input type="button" value="3" onclick="addToDisplay('3')">
<input type="button" value="+" onclick="addToDisplay('+')">
<input type="button" value="4" onclick="addToDisplay('4')">
<input type="button" value="5" onclick="addToDisplay('5')">
<input type="button" value="6" onclick="addToDisplay('6')">
<input type="button" value="-" onclick="addToDisplay('-')">
<input type="button" value="7" onclick="addToDisplay('7')">
<input type="button" value="8" onclick="addToDisplay('8')">
<input type="button" value="9" onclick="addToDisplay('9')">
<input type="button" value="*" onclick="addToDisplay('*')">
<input type="button" value="." onclick="addToDisplay('.')">
<input type="button" value="0" onclick="addToDisplay('0')">
<input type="button" value="C" onclick="clearDisplay()">
<input type="button" value="/" onclick="addToDisplay('/')">
<input type="button" value="=" onclick="calculate()">
</div>
<script type="text/javascript">
function addToDisplay(value) {
document.getElementById("display").value += value;
}
function clearDisplay() {
document.getElementById("display").value = "";
}
function calculate() {
var expression = document.getElementById("display").value;
var result = eval(expression);
document.getElementById("display").value = result;
}
</script>
</body>
</html>
第二个
demo演示
<!DOCTYPE html>
<html>
<head>
<title>计算器</title>
<style>
body {
background-color: #F5F5F5;
font-family: Arial, sans-serif;
text-align: center;
}
h1 {
margin-top: 50px;
font-size: 30px;
}
.calculator {
background-color: #F5F5F5;
border-radius: 10px;
box-shadow: 0px 0px 10px #888888;
margin: 50px auto;
padding: 20px;
width: 300px;
}
.display {
background-color: #FFFFFF;
border: 1px solid #CCCCCC;
border-radius: 5px;
font-size: 24px;
height: 50px;
margin-bottom: 10px;
padding: 10px;
text-align: right;
width: 100%;
}
.button {
background-color: #CCCCCC;
border: none;
border-radius: 5px;
color: #000000;
cursor: pointer;
font-size: 24px;
height: 50px;
margin-bottom: 10px;
width: 23%;
}
.button:hover {
background-color: #DDDDDD;
}
.button:active {
box-shadow: none;
background-color: #AAAAAA;
}
.operator {
background-color: #FFA500;
color: #FFFFFF;
}
.equals {
background-color: #4CAF50;
color: #FFFFFF;
width: 48%;
}
</style>
</head>
<body>
<h1>计算器</h1>
<div class="calculator">
<div class="display" id="display"></div>
<button class="button" onclick="addToDisplay('7')">7</button>
<button class="button" onclick="addToDisplay('8')">8</button>
<button class="button" onclick="addToDisplay('9')">9</button>
<button class="button operator" onclick="addToDisplay('+')">+</button>
<button class="button" onclick="addToDisplay('4')">4</button>
<button class="button" onclick="addToDisplay('5')">5</button>
<button class="button" onclick="addToDisplay('6')">6</button>
<button class="button operator" onclick="addToDisplay('-')">-</button>
<button class="button" onclick="addToDisplay('1')">1</button>
<button class="button" onclick="addToDisplay('2')">2</button>
<button class="button" onclick="addToDisplay('3')">3</button>
<button class="button operator" onclick="addToDisplay('*')">×</button>
<button class="button" onclick="addToDisplay('0')">0</button>
<button class="button" onclick="addToDisplay('.')">.</button>
<button class="button operator" onclick="addToDisplay('/')">÷</button>
<button class="button" onclick="clearDisplay()">C</button>
<button class="button equals" onclick="calculate()">=</button>
</div>
<script>
function addToDisplay(value) {
document.getElementById("display").innerHTML += value;
}
function clearDisplay() {
document.getElementById("display").innerHTML = "";
}
function calculate() {
var expression = document.getElementById("display").innerHTML;
var result = eval(expression);
document.getElementById("display").innerHTML = result;
}
</script>
</body>
</html>