JS实现当前元素的同级元素以及父元素的同级元素

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>实现当前元素的同级元素 以及父元素的同级元素</title>
    <style>
    </style>
</head>

<body>
    <div id="category"></div>
    <script>
        const categories = [
            { id: 1, name: "电子产品", parent: 0 },
            { id: 2, name: "手机", parent: 1 },
            { id: 3, name: "苹果", parent: 2 },
            { id: 4, name: "小米", parent: 2 },
            { id: 5, name: "华为", parent: 2 },
            { id: 6, name: "电脑", parent: 1 },
            { id: 7, name: "笔记本", parent: 6 },
            { id: 8, name: "台式机", parent: 6 },
            { id: 9, name: "服装", parent: 0 },
            { id: 10, name: "男装", parent: 9 },
            { id: 11, name: "衬衫", parent: 10 },
            { id: 12, name: "裤子", parent: 10 },
            { id: 13, name: "女装", parent: 9 },
            { id: 14, name: "裙子", parent: 13 },
            { id: 15, name: "上衣", parent: 13 },
            { id: 16, name: "萝莉", parent: 13 },
            { id: 17, name: "御姐", parent: 13 },
        ];
        const container = document.getElementById("category"); // 获取容器元素
        function test(currentId) {
            const item = categories.find((category) => category.id === currentId);
            const parentId = item.parent;
            const items = categories.filter((category) => category.parent === parentId);

            const sel = document.createElement("select");
            sel.add(new Option("-请选择-", -1));
            items.forEach(child => {
                const option = new Option(child.name, child.id);
                sel.add(option);
            });
            container.insertBefore(sel, container.firstChild);
            if (parentId != 0) {
                test(parentId);
            }
        }
        test(17);
    </script>

</body>

</html>