Помогите, пожалуйста, написать js или jquery код. для того, чтобы при нажатии на стрелку блок закрывался/открывался
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body{
font-size: 16px;
font-family: Arial;
line-height: 1.5;
font-weight: 400;
height: 100%;
overflow-wrap: break-word;
}
.table-of-contents {
background: #f2f5f9;
margin-bottom: 30px;
line-height: 1.7;
}
.table-of-contents__header {
padding: 15px 30px;
font-weight: 700;
font-size: 1.1em;
}
.table-of-contents__hide {
cursor: pointer;
}
.table-of-contents.open .table-of-contents__hide:after {
content: "︿";
line-height: 1;
}
.table-of-contents__hide:after {
content: "﹀";
margin-left: 12px;
line-height: 1;
}
.table-of-contents.open .table-of-contents__list {
display: block;
}
.table-of-contents ol {
margin: 0 30px 0;
padding: 0 0 15px 0;
list-style: none;
}
.table-of-contents ol .level-1 {
margin-top: 0.4em;
margin-bottom: 0.2em;
}
.table-of-contents ol li {
padding-left: 0;
}
<!DOCTYPE html>
<html lang="ru">
<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>
<link href="https://fonts.googleapis.com/css2?family=Montserrat&family=Raleway:wght@300&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Raleway:wght@300&display=swap" rel="stylesheet">
<link href="style5.css" type="text/css" rel="stylesheet">
</head>
<body>
<div class = "table-of-contents open">
<div class ="table-of-contents__header">
<span class = "table-of-contents__hide js-table-of-contents-hide">
Содержание
</span>
</div>
<ol class ="table-of-contents__list js-table-of-contents-list" style>
<li class="level-1">
<a href="#xronologya-razvitia-system">Хронология развития системы</a>
</li>
<li class="level-1">
<a href="#">Разработка приложений в HarmonyOS</a>
</li>
</ol>
</div>
</body>
<script src="https://yastatic.net/jquery/3.3.1/jquery.min.js"></script>
<script src ="java.js"></script>
</html>
Источник: Stack Overflow на русском