learnJavaScript/sweety.html at main · mikebars1995/learnJavaScript · GitHub

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<!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>Document</title>
    <style>
        .menu ul {
            margin: 0;
            list-style: none;
            padding-left: 20px;
            display: none;
        }

        .menu .title {
            font-size: 18px;
            cursor: pointer;
        }


        .menu .title::before {
            content: '▶ ';
            font-size: 80%;
            color: green;
        }

        .menu.open .title::before {
            content: '▼ ';
        }

        .menu.open ul {
            display: block;
        }
    </style>
</head>

<body>
    <div id="sweeties" class="menu">
        <span class="title">Сладости (нажми меня)!</span>
        <ul>
            <li>Пирожное</li>
            <li>Пончик</li>
            <li>Мёд</li>
        </ul>
    </div>

    <script>
        let menuElem = document.getElementById('sweeties');
        let titleElem = menuElem.querySelector('.title');

        titleElem.onclick = function () {
            menuElem.classList.toggle('open');
        };
    </script>

</body>

</html>