树形结构转数组

[
    {
        id: 1,
        text: '节点1',
        parentId: 0,
        children: [
            {
                id:2,
                text: '节点1_1',
                parentId:1
            }
        ]
    }
]
转成
[
    {
        id: 1,
        text: '节点1',
        parentId: 0 //这里用0表示为顶级节点
    },
    {
        id: 2,
        text: '节点1_1',
        parentId: 1 //通过这个字段来确定子父级
    }
    ...
]

function treeToList(data) {
    let res = [];
    const dfs = (tree) => {
        tree.forEach((item) => {
            if(item.children) {
                dfs(item.children);
                delete item.children;
            }
            res.push(item)
        })
    }
    dfs(data);
    return res;
}