Live Code Editor

Try it yourself..

Create simple calculator using HTML, CSS, and JavaScript

HTML

xxxxxxxxxx
 
                                                     <div class="calculator">
        <input type="text" id="display" disabled>
        <div class="buttons">
            <button class="button clear" onclick="clearDisplay()">C</button>
            <button class="button delete" onclick="deleteLast()">DEL</button>
            <button class="button operator" onclick="appendToDisplay('/')">/</button>
            <button class="button operator" onclick="appendToDisplay('*')">*</button>
            <button class="button" onclick="appendToDisplay('7')">7</button>
            <button class="button" onclick="appendToDisplay('8')">8</button>
            <button class="button" onclick="appendToDisplay('9')">9</button>
            <button class="button operator" onclick="appendToDisplay('-')">-</button>
            <button class="button" onclick="appendToDisplay('4')">4</button>
            <button class="button" onclick="appendToDisplay('5')">5</button>
            <button class="button" onclick="appendToDisplay('6')">6</button>
            <button class="button operator" onclick="appendToDisplay('+')">+</button>
            <button class="button" onclick="appendToDisplay('1')">1</button>
            <button class="button" onclick="appendToDisplay('2')">2</button>
            <button class="button" onclick="appendToDisplay('3')">3</button>
            <button class="button equals" onclick="calculateResult()">=</button>
            <button class="button zero" onclick="appendToDisplay('0')">0</button>
            <button class="button" onclick="appendToDisplay('.')">.</button>
        </div>
    </div>
                                                 

CSS

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #282c34;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
}

.calculator {
    border: 1px solid #444;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    background-color: #1c1c1c;
}

#display {
    width: 100%;
    padding: 20px;
    font-size: 2em;
    border: none;
    text-align: right;
    background-color: #333;
    color: #fff;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.button {
    padding: 20px;
    font-size: 1.5em;
    border: 1px solid #444;
    background-color: #666;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.button:hover {
    background-color: #555;
}

.button:active {
    background-color: #444;
}

.button.operator {
    background-color: #f39c12;
}

.button.operator:hover {
    background-color: #e67e22;
}

.button.operator:active {
    background-color: #d35400;
}

.button.clear {
    background-color: #e74c3c;
}

.button.clear:hover {
    background-color: #c0392b;
}

.button.clear:active {
    background-color: #a93226;
}

.button.delete {
    background-color: #e67e22;
}

.button.delete:hover {
    background-color: #d35400;
}

.button.delete:active {
    background-color: #b03a2e;
}

.button.equals {
    grid-column: span 4;
    background-color: #27ae60;
}

.button.equals:hover {
    background-color: #2ecc71;
}

.button.equals:active {
    background-color: #229954;
}

.button.zero {
    grid-column: span 2;
}

xxxxxxxxxx
 
                                                  body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #282c34;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
}
​
.calculator {
    border: 1px solid #444;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    background-color: #1c1c1c;
}
​
#display {
    width: 100%;
    padding: 20px;
    font-size: 2em;
    border: none;
    text-align: right;
    background-color: #333;
    color: #fff;
}
​
.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
​
.button {
    padding: 20px;

JavaScript

xxxxxxxxxx
 
                                                        function clearDisplay() {
    document.getElementById('display').value = '';
}
​
function deleteLast() {
    let display = document.getElementById('display');
    display.value = display.value.slice(0, -1);
}
​
function appendToDisplay(value) {
    let display = document.getElementById('display');
    display.value += value;
}
​
function calculateResult() {
    let display = document.getElementById('display');
    try {
        display.value = eval(display.value);
    } catch (e) {
        display.value = 'Error';
    }
}
                                                    

Live Code Editor

Create simple calculator using HTML, CSS, and JavaScript

HTML

CSS

JavaScript

Output