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<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<title>Modern Calculator</title> | |
<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap" rel="stylesheet"> | |
<style> | |
* { | |
margin: 0; | |
padding: 0; | |
box-sizing: border-box; | |
font-family: 'Roboto', sans-serif; | |
user-select: none; | |
} | |
body { | |
display: flex; | |
justify-content: center; | |
align-items: center; | |
min-height: 100vh; | |
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); | |
} | |
.calculator { | |
width: 320px; | |
background: rgba(255, 255, 255, 0.1); | |
backdrop-filter: blur(10px); | |
border-radius: 20px; | |
box-shadow: 0 25px 45px rgba(0, 0, 0, 0.2); | |
border: 1px solid rgba(255, 255, 255, 0.1); | |
padding: 20px; | |
overflow: hidden; | |
transition: all 0.3s ease; | |
} | |
.display { | |
padding: 20px; | |
margin-bottom: 20px; | |
text-align: right; | |
font-size: 2.5rem; | |
color: white; | |
background: rgba(255, 255, 255, 0.05); | |
border-radius: 10px; | |
height: 100px; | |
display: flex; | |
flex-direction: column; | |
justify-content: space-between; | |
overflow: hidden; | |
} | |
.previous-operand { | |
font-size: 1rem; | |
color: rgba(255, 255, 255, 0.7); | |
height: 20px; | |
overflow: hidden; | |
text-overflow: ellipsis; | |
} | |
.current-operand { | |
overflow: hidden; | |
text-overflow: ellipsis; | |
} | |
.buttons-grid { | |
display: grid; | |
grid-template-columns: repeat(4, 1fr); | |
gap: 12px; | |
} | |
.btn { | |
height: 60px; | |
border: none; | |
border-radius: 12px; | |
font-size: 1.2rem; | |
cursor: pointer; | |
transition: all 0.2s ease; | |
color: white; | |
background: rgba(255, 255, 255, 0.1); | |
display: flex; | |
justify-content: center; | |
align-items: center; | |
position: relative; | |
overflow: hidden; | |
} | |
.btn:active { | |
transform: scale(0.95); | |
} | |
.btn::after { | |
content: ''; | |
position: absolute; | |
top: 50%; | |
left: 50%; | |
width: 5px; | |
height: 5px; | |
background: rgba(255, 255, 255, 0.5); | |
opacity: 0; | |
border-radius: 100%; | |
transform: scale(1, 1) translate(-50%); | |
transform-origin: 50% 50%; | |
} | |
.btn:focus:not(:active)::after { | |
animation: ripple 1s ease-out; | |
} | |
@keyframes ripple { | |
0% { | |
transform: scale(0, 0); | |
opacity: 0.5; | |
} | |
100% { | |
transform: scale(20, 20); | |
opacity: 0; | |
} | |
} | |
.btn-operation { | |
background: rgba(255, 166, 0, 0.5); | |
} | |
.btn-equals { | |
background: rgba(76, 175, 80, 0.6); | |
} | |
.btn-clear { | |
background: rgba(244, 67, 54, 0.6); | |
} | |
.btn-delete { | |
background: rgba(156, 39, 176, 0.6); | |
} | |
.span-2 { | |
grid-column: span 2; | |
} | |
</style> | |
</head> | |
<body> | |
<div class="calculator"> | |
<div class="display"> | |
<div class="previous-operand" id="previous-operand"></div> | |
<div class="current-operand" id="current-operand">0</div> | |
</div> | |
<div class="buttons-grid"> | |
<button class="btn btn-clear span-2" id="clear">AC</button> | |
<button class="btn btn-delete" id="delete">DEL</button> | |
<button class="btn btn-operation" id="divide">÷</button> | |
<button class="btn" id="seven">7</button> | |
<button class="btn" id="eight">8</button> | |
<button class="btn" id="nine">9</button> | |
<button class="btn btn-operation" id="multiply">×</button> | |
<button class="btn" id="four">4</button> | |
<button class="btn" id="five">5</button> | |
<button class="btn" id="six">6</button> | |
<button class="btn btn-operation" id="subtract">-</button> | |
<button class="btn" id="one">1</button> | |
<button class="btn" id="two">2</button> | |
<button class="btn" id="three">3</button> | |
<button class="btn btn-operation" id="add">+</button> | |
<button class="btn" id="zero">0</button> | |
<button class="btn" id="decimal">.</button> | |
<button class="btn btn-equals span-2" id="equals">=</button> | |
</div> | |
</div> | |
<script> | |
document.addEventListener('DOMContentLoaded', () => { | |
const previousOperandElement = document.getElementById('previous-operand'); | |
const currentOperandElement = document.getElementById('current-operand'); | |
const numberButtons = document.querySelectorAll('.btn:not(.btn-operation):not(.btn-equals):not(.btn-clear):not(.btn-delete)'); | |
const operationButtons = document.querySelectorAll('.btn-operation'); | |
const equalsButton = document.getElementById('equals'); | |
const clearButton = document.getElementById('clear'); | |
const deleteButton = document.getElementById('delete'); | |
class Calculator { | |
constructor(previousOperandElement, currentOperandElement) { | |
this.previousOperandElement = previousOperandElement; | |
this.currentOperandElement = currentOperandElement; | |
this.clear(); | |
} | |
clear() { | |
this.currentOperand = '0'; | |
this.previousOperand = ''; | |
this.operation = undefined; | |
} | |
delete() { | |
this.currentOperand = this.currentOperand.toString().slice(0, -1); | |
if (this.currentOperand === '') { | |
this.currentOperand = '0'; | |
} | |
} | |
appendNumber(number) { | |
if (number === '.' && this.currentOperand.includes('.')) return; | |
if (this.currentOperand === '0' && number !== '.') { | |
this.currentOperand = number.toString(); | |
} else { | |
this.currentOperand = this.currentOperand.toString() + number.toString(); | |
} | |
} | |
chooseOperation(operation) { | |
if (this.currentOperand === '') return; | |
if (this.previousOperand !== '') { | |
this.compute(); | |
} | |
this.operation = operation; | |
this.previousOperand = this.currentOperand; | |
this.currentOperand = ''; | |
} | |
compute() { | |
let computation; | |
const prev = parseFloat(this.previousOperand); | |
const current = parseFloat(this.currentOperand); | |
if (isNaN(prev) || isNaN(current)) return; | |
switch (this.operation) { | |
case '+': | |
computation = prev + current; | |
break; | |
case '-': | |
computation = prev - current; | |
break; | |
case '×': | |
computation = prev * current; | |
break; | |
case '÷': | |
computation = prev / current; | |
break; | |
default: | |
return; | |
} | |
this.currentOperand = computation.toString(); | |
this.operation = undefined; | |
this.previousOperand = ''; | |
} | |
updateDisplay() { | |
this.currentOperandElement.innerText = this.currentOperand; | |
if (this.operation != null) { | |
this.previousOperandElement.innerText = | |
`${this.previousOperand} ${this.operation}`; | |
} else { | |
this.previousOperandElement.innerText = ''; | |
} | |
} | |
} | |
const calculator = new Calculator(previousOperandElement, currentOperandElement); | |
numberButtons.forEach(button => { | |
button.addEventListener('click', () => { | |
calculator.appendNumber(button.innerText); | |
calculator.updateDisplay(); | |
}); | |
}); | |
operationButtons.forEach(button => { | |
button.addEventListener('click', () => { | |
calculator.chooseOperation(button.innerText); | |
calculator.updateDisplay(); | |
}); | |
}); | |
equalsButton.addEventListener('click', () => { | |
calculator.compute(); | |
calculator.updateDisplay(); | |
}); | |
clearButton.addEventListener('click', () => { | |
calculator.clear(); | |
calculator.updateDisplay(); | |
}); | |
deleteButton.addEventListener('click', () => { | |
calculator.delete(); | |
calculator.updateDisplay(); | |
}); | |
// Keyboard support | |
document.addEventListener('keydown', (e) => { | |
if ((e.key >= '0' && e.key <= '9') || e.key === '.') { | |
calculator.appendNumber(e.key); | |
calculator.updateDisplay(); | |
} else if (e.key === '+' || e.key === '-' || e.key === '*' || e.key === '/') { | |
let operation; | |
if (e.key === '*') operation = '×'; | |
else if (e.key === '/') operation = '÷'; | |
else operation = e.key; | |
calculator.chooseOperation(operation); | |
calculator.updateDisplay(); | |
} else if (e.key === 'Enter' || e.key === '=') { | |
e.preventDefault(); | |
calculator.compute(); | |
calculator.updateDisplay(); | |
} else if (e.key === 'Backspace') { | |
calculator.delete(); | |
calculator.updateDisplay(); | |
} else if (e.key === 'Escape') { | |
calculator.clear(); | |
calculator.updateDisplay(); | |
} | |
}); | |
// Button ripple effect | |
const buttons = document.querySelectorAll('.btn'); | |
buttons.forEach(button => { | |
button.addEventListener('click', function() { | |
this.focus(); | |
}); | |
}); | |
}); | |
</script> | |
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</html> |