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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> | |
| <style> | |
| * { | |
| margin: 0; | |
| padding: 0; | |
| box-sizing: border-box; | |
| } | |
| body { | |
| min-height: 100vh; | |
| display: grid; | |
| place-items: center; | |
| background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); | |
| font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif; | |
| padding: 20px; | |
| } | |
| .calculator { | |
| background: rgba(255, 255, 255, 0.1); | |
| backdrop-filter: blur(10px); | |
| border-radius: 20px; | |
| padding: 30px; | |
| box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37); | |
| border: 1px solid rgba(255, 255, 255, 0.18); | |
| max-width: 350px; | |
| width: 100%; | |
| } | |
| .display { | |
| background: rgba(255, 255, 255, 0.9); | |
| border-radius: 15px; | |
| padding: 20px; | |
| margin-bottom: 20px; | |
| text-align: right; | |
| min-height: 80px; | |
| display: flex; | |
| flex-direction: column; | |
| justify-content: center; | |
| box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1); | |
| } | |
| .previous-operand { | |
| color: rgba(0, 0, 0, 0.5); | |
| font-size: 1.2rem; | |
| min-height: 1.5rem; | |
| overflow: hidden; | |
| } | |
| .current-operand { | |
| color: #000; | |
| font-size: 2rem; | |
| font-weight: 500; | |
| word-wrap: break-word; | |
| overflow: hidden; | |
| } | |
| .buttons { | |
| display: grid; | |
| grid-template-columns: repeat(4, 1fr); | |
| gap: 10px; | |
| } | |
| button { | |
| border: none; | |
| outline: none; | |
| background: rgba(255, 255, 255, 0.2); | |
| color: white; | |
| font-size: 1.5rem; | |
| padding: 25px; | |
| border-radius: 15px; | |
| cursor: pointer; | |
| transition: all 0.3s ease; | |
| backdrop-filter: blur(5px); | |
| border: 1px solid rgba(255, 255, 255, 0.1); | |
| } | |
| button:hover { | |
| background: rgba(255, 255, 255, 0.3); | |
| transform: translateY(-2px); | |
| box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2); | |
| } | |
| button:active { | |
| transform: translateY(0); | |
| box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); | |
| } | |
| .operator { | |
| background: rgba(255, 149, 0, 0.8); | |
| font-weight: bold; | |
| } | |
| .operator:hover { | |
| background: rgba(255, 149, 0, 0.9); | |
| } | |
| .equals { | |
| background: rgba(0, 255, 127, 0.8); | |
| font-weight: bold; | |
| } | |
| .equals:hover { | |
| background: rgba(0, 255, 127, 0.9); | |
| } | |
| .clear, .delete { | |
| background: rgba(255, 59, 48, 0.8); | |
| font-weight: bold; | |
| } | |
| .clear:hover, .delete:hover { | |
| background: rgba(255, 59, 48, 0.9); | |
| } | |
| .span-2 { | |
| grid-column: span 2; | |
| } | |
| @media (max-width: 400px) { | |
| .calculator { | |
| padding: 20px; | |
| } | |
| button { | |
| padding: 20px; | |
| font-size: 1.3rem; | |
| } | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="calculator"> | |
| <div class="display"> | |
| <div class="previous-operand" data-previous-operand></div> | |
| <div class="current-operand" data-current-operand>0</div> | |
| </div> | |
| <div class="buttons"> | |
| <button class="clear span-2" data-clear>C</button> | |
| <button class="delete" data-delete>⌫</button> | |
| <button class="operator" data-operation>÷</button> | |
| <button data-number>7</button> | |
| <button data-number>8</button> | |
| <button data-number>9</button> | |
| <button class="operator" data-operation>×</button> | |
| <button data-number>4</button> | |
| <button data-number>5</button> | |
| <button data-number>6</button> | |
| <button class="operator" data-operation>-</button> | |
| <button data-number>1</button> | |
| <button data-number>2</button> | |
| <button data-number>3</button> | |
| <button class="operator" data-operation>+</button> | |
| <button data-number>0</button> | |
| <button data-number>.</button> | |
| <button class="equals span-2" data-equals>=</button> | |
| </div> | |
| </div> | |
| <script> | |
| class Calculator { | |
| constructor(previousOperandElement, currentOperandElement) { | |
| this.previousOperandElement = previousOperandElement; | |
| this.currentOperandElement = currentOperandElement; | |
| this.clear(); | |
| } | |
| clear() { | |
| this.currentOperand = '0'; | |
| this.previousOperand = ''; | |
| this.operation = undefined; | |
| } | |
| delete() { | |
| if (this.currentOperand === '0') return; | |
| if (this.currentOperand.length === 1) { | |
| this.currentOperand = '0'; | |
| } else { | |
| this.currentOperand = this.currentOperand.slice(0, -1); | |
| } | |
| } | |
| appendNumber(number) { | |
| if (number === '.' && this.currentOperand.includes('.')) return; | |
| if (this.currentOperand === '0' && number !== '.') { | |
| this.currentOperand = number; | |
| } else { | |
| this.currentOperand = this.currentOperand + number; | |
| } | |
| } | |
| 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 = ''; | |
| } | |
| getDisplayNumber(number) { | |
| const stringNumber = number.toString(); | |
| const integerDigits = parseFloat(stringNumber.split('.')[0]); | |
| const decimalDigits = stringNumber.split('.')[1]; | |
| let integerDisplay; | |
| if (isNaN(integerDigits)) { | |
| integerDisplay = ''; | |
| } else { | |
| integerDisplay = integerDigits.toLocaleString('en', { maximumFractionDigits: 0 }); | |
| } | |
| if (decimalDigits != null) { | |
| return `${integerDisplay}.${decimalDigits}`; | |
| } else { | |
| return integerDisplay; | |
| } | |
| } | |
| updateDisplay() { | |
| this.currentOperandElement.innerText = this.getDisplayNumber(this.currentOperand); | |
| if (this.operation != null) { | |
| this.previousOperandElement.innerText = `${this.getDisplayNumber(this.previousOperand)} ${this.operation}`; | |
| } else { | |
| this.previousOperandElement.innerText = ''; | |
| } | |
| } | |
| } | |
| const previousOperandElement = document.querySelector('[data-previous-operand]'); | |
| const currentOperandElement = document.querySelector('[data-current-operand]'); | |
| const numberButtons = document.querySelectorAll('[data-number]'); | |
| const operationButtons = document.querySelectorAll('[data-operation]'); | |
| const equalsButton = document.querySelector('[data-equals]'); | |
| const deleteButton = document.querySelector('[data-delete]'); | |
| const clearButton = document.querySelector('[data-clear]'); | |
| 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') { | |
| calculator.appendNumber(e.key); | |
| calculator.updateDisplay(); | |
| } else if (e.key === '.') { | |
| calculator.appendNumber('.'); | |
| calculator.updateDisplay(); | |
| } else if (e.key === '+' || e.key === '-') { | |
| calculator.chooseOperation(e.key); | |
| calculator.updateDisplay(); | |
| } else if (e.key === '*') { | |
| calculator.chooseOperation('×'); | |
| calculator.updateDisplay(); | |
| } else if (e.key === '/') { | |
| e.preventDefault(); | |
| calculator.chooseOperation('÷'); | |
| calculator.updateDisplay(); | |
| } else if (e.key === 'Enter' || e.key === '=') { | |
| calculator.compute(); | |
| calculator.updateDisplay(); | |
| } else if (e.key === 'Backspace') { | |
| calculator.delete(); | |
| calculator.updateDisplay(); | |
| } else if (e.key === 'Escape' || e.key === 'c' || e.key === 'C') { | |
| calculator.clear(); | |
| calculator.updateDisplay(); | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |