HTML+CSS+JS简易计算器
index.html
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>简易计算器title>
<link rel="stylesheet" href="index.css">
<script src="index.js" defer>script>
head>
<body>
<div class="toggle">div>
<div class="calculator">
<div class="button">
<h2 id="result">h2>
<span id="clear">Clearspan>
<span>/span>
<span>*span>
<span>7span>
<span>8span>
<span>9span>
<span>-span>
<span>4span>
<span>5span>
<span>6span>
<span id="plus">+span>
<span>1span>
<span>2span>
<span>3span>
<span>0span>
<span>00span>
<span>.span>
<span id="equal">=span>
div>
div>
body>
html>
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index.css
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: consolas;
}
body {
display: flex;
justify-content: center;
align-items: center;
background-color: #edf1f4;
}
.calculator {
position: relative;
margin-top: 50px ;
width: 340px;
padding: 20px;
border-radius: 20px;
box-shadow: 15px 15px 20px rgba(0, 0, 0, 0.1), -15px -15px 20px #fffb;
}
.calculator .button {
position: relative;
display: grid;
}
.calculator .button #result {
padding: 0 20px;
position: relative;
left: 8px;
grid-column: span 4;
height: 100px;
line-height: 100px;
border-radius: 10px;
text-align: end;
font-size: 2em;
color: rgb(11, 155, 107);
overflow: hidden;
font-weight: 500;
width: calc(100% - 16px);
user-select: none;
box-shadow: inset 5px 5px 10px rgba(0, 0, 0, 0.1),
inset -5px -5px 20px #fff;
}
.calculator .button span {
position: relative;
display: flex;
justify-content: center;
align-items: center;
padding: 10px;
border-radius: 10px;
margin: 10px;
min-width: 40px;
font-size: 1.2em;
border: 2px solid #e2ecf3;
box-shadow: 5px 5px 10px #a7cbe5, -5px -5px 10px #e9ecef;
cursor: pointer;
user-select: none;
}
.calculator .button span:active {
color: #739fea;
box-shadow: inset 5px 5px 10px #a7cbe5, inset -5px -5px 10px #e9ecef;
}
.calculator .button span#clear {
grid-column: span 2;
background-color: #f44336;
border: 2px solid #cfe4f4;
color: #fff;
}
.calculator .button span#plus {
grid-row: span 2;
background-color: #31a935;
border: 2px solid #cfe4f4;
color: #fff;
}
.calculator .button span#equal {
background: #2196f3;
border: 2px solid #cfe4f4;
color: #fff;
}
.calculator .buttons span#clear:active,
.calculator .buttons span#plus:active,
.calculator .buttons span#equal:active {
box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.1),
-5px -5px 10px #fff,
inset 5px 5px 10px rgba(0, 0, 0, 0.1);
}
.toggle {
position: fixed;
top: 20px;
right: 20px;
background-color: #4b494c;
width: 40px;
height: 40px;
border-radius: 50%;
cursor: pointer;
border: 2px solid #edf1f4;
box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.1),
-5px -5px 10px #fff;
}
.dark .toggle {
background: #edf1f4;
border: 2px solid #333;
box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.5),
-5px -5px 10px rgba(255, 255, 255, 0.25);
}
.dark
{
background: #282c2f;
}
.dark .calculator
{
background: #33393e;
box-shadow: 15px 15px 20px rgba(0,0,0,0.25),
-15px -15px 20px rgba(255,255,255,0.1);
}
.dark .calculator #value
{
color: #eee;
box-shadow: inset 5px 5px 10px rgba(0,0,0,0.5),
inset -5px -5px 20px rgba(255,255,255,0.1);
}
.dark .calculator .buttons span
{
color: #eee;
border: 2px solid #333;
box-shadow: 5px 5px 10px rgba(0,0,0,0.25),
-5px -5px 10px rgba(255,255,255,0.1);
}
.dark .calculator .buttons span:active
{
box-shadow: inset 5px 5px 10px rgba(0,0,0,0.25),
inset -5px -5px 10px rgba(255,255,255,0.1);
}
.dark .calculator .buttons span#clear,
.dark .calculator .buttons span#plus,
.dark .calculator .buttons span#equal
{
border: 2px solid #333;;
}
.dark .calculator .buttons span#clear:active,
.dark .calculator .buttons span#plus:active,
.dark .calculator .buttons span#equal:active
{
box-shadow: inset 5px 5px 10px rgba(0,0,0,0.1);
}
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idnex.js
const button = document.querySelector('.button');
const btn = button.querySelectorAll('span');
const result = document.getElementById('result');
const toggle = document.querySelector('.toggle');
const body = document.querySelector('body');
for (let i = 0; i < btn.length; i++) {
btn[i].addEventListener("click", function () {
if (this.innerHTML == "=") {
result.innerHTML = eval(result.innerHTML);
} else {
if (this.innerHTML == 'Clear') {
result.innerHTML = " ";
}else{
result.innerHTML += this.innerHTML
}
}
})
}
toggle.onclick = function(){
body.classList.toggle('dark')
}
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运行结果
