Octal to Decimal converter Tool with colorful styling and all its features use any free library

 

Octal to Decimal Converter

body { font-family: 'Arial', sans-serif; background-color: #f0f4f8; margin: 0; padding: 20px; } .container { max-width: 400px; margin: 0 auto; padding: 20px; border-radius: 10px; background-color: #ffffff; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); text-align: center; } h1 { color: #333; } input[type="text"] { width: 80%; padding: 10px; margin-bottom: 10px; border: 2px solid #4a90e2; border-radius: 5px; font-size: 16px; transition: border-color 0.3s; } input[type="text"]:focus { border-color: #007bff; outline: none; } button { padding: 10px 20px; background-color: #4a90e2; color: white; border: none; border-radius: 5px; font-size: 16px; cursor: pointer; transition: background-color 0.3s; } button:hover { background-color: #007bff; } .result { margin-top: 20px; padding: 10px; border: 1px solid #4a90e2; border-radius: 5px; font-size: 18px; color: #333; display: none; } document.getElementById("convertButton").addEventListener("click", function() { const octalInput = document.getElementById("octalInput").value; const resultContainer = document.getElementById("resultContainer"); // Validate input if (!/^[0-7]+$/.test(octalInput)) { resultContainer.textContent = "Please enter a valid octal number."; resultContainer.style.color = "red"; resultContainer.style.display = "block"; return; } // Convert octal to decimal const decimalValue = parseInt(octalInput, 8); // Display result resultContainer.textContent = `Decimal Value: ${decimalValue}`; resultContainer.style.color = "#4a90e2"; // Color for valid output resultContainer.style.display = "block"; });