递归遍历书树形数据获取父级key

结果

        var data = [                {                    "key": "sub1",                    "children": [                        {                            "key": "sub1-1"                        }                    ]                },                {                    "key": "sub2",                    "children": [                        {                            "key": "sub2-1",                            "children": [                                {                                    "key": "sub2-1-1"                                },                                {                                    "key": "sub2-1-2"                                },                                {                                    "key": "sub2-1-3",                                    "children": [                                        {                                            "key": "sub2-1-3-1"                                        }                                    ]                                }                            ]                        },                        {                            "key": "sub2-2"                        },                        {                            "key": "sub2-3"                        }                    ]                },                {                    "key": "sub3",                    "children": [                        {                            "key": "sub3-1"                        },                        {                            "key": "sub3-2"                        }                    ]                }            ]            const getopenkey = (arr, itme, reulit = []) => {                arr.forEach((v) => {                    if (itme.indexOf(v.key) !== -1) {                        reulit.push(v.key);                    }                    if (v.children && v.children.length) {                        getopenkey(v.children, itme, reulit)                    }                })                return reulit            }            let element = 'sub2-1-3-1'            console.log(getopenkey(data, element))