index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./assets/css/style.css">
</head>

<body>
    <blockquote>
        <h2>Decode/Encode URL</h2>
        <p>sample for decode <br>
            <kbd>https%3A%2F%2Fgithub.com%2FId-Yuu</kbd>
        </p>
    </blockquote>
    <form action="" id="form">
        <div class="form-group">
            <label for="decodeUrl">Input your string url</label>
            <textarea name="decodeUrl" id="decodeUrl" cols="3" rows="3"></textarea>
        </div>
        <div class="btn-group">
            <button type="submit" id="decode" class="btns">
                Decode
            </button>
            <button type="submit" id="encode" class="btns">
                Encode
            </button>
        </div>
    </form>
</body>

<script src="./assets/js/script.js"></script>

</html>