【JS】树形数据生成

// mockData
var data = [
        {"id": "1", "name": "a", "pid": "0"},
        {"id": "1.1", "name": "a1", "pid": "1"},
        {"id": "1.2", "name": "a2", "pid": "1"},
        {"id": "2", "name": "b", "pid": "0"},
        {"id": "2.1", "name": "b1", "pid": "2"},
        {"id": "2.2", "name": "b2", "pid": "2"}
    ];

生成经典 tree 数据

    function createTree(id, data) {
        let tree = []
        data.forEach((item, i) => {
            if(id == item.pid) {
                tree.push({
                    label: item.name,
                    children: createTree(item.id, data)
                })
            }
        })
        return tree
    }
    console.log(createTree(0, data))