index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>skills</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="contant">
        <nav>
            <div class="name">
                <a href="">Skills!</a>
            </div>

            <ul class="option">
                <li><a href="">Home</a></li>
                <li><a href="">About</a></li>
                <li><a href="">Survices</a></li>
                <li><a href="">Contact</a></li>
            </ul>
            <div class="line">
                <div class="manu-line"></div>
                <div class="manu-line"></div>
                <div class="manu-line"></div>
            </div>
        </nav>
    </div>
    
    <script>
       const line=document.querySelector('.line') 
       const menu=document.querySelector('nav ul')
       line.addEventListener('click',()=>{
        menu.classList.toggle('show')
       })
    </script>
</body>
</html>