05

 1       var jsonData = eval(`[
 2       {"id":"4","pid":"1","name":"大家电"},
 3       {"id":"5","pid":"1","name":"生活电器"},
 4       {"id":"1","pid":"0","name":"家用电器"},
 5       {"id":"2","pid":"0","name":"服饰"},
 6       {"id":"3","pid":"0","name":"化妆"},
 7       {"id":"7","pid":"4","name":"空调"},
 8       {"id":"8","pid":"4","name":"冰箱"},
 9       {"id":"9","pid":"4","name":"洗衣机"},
10       {"id":"10","pid":"4","name":"热水器"},
11       {"id":"11","pid":"3","name":"面部护理"},
12       {"id":"12","pid":"3","name":"口腔护理"},
13       {"id":"13","pid":"2","name":"男装"},
14       {"id":"14","pid":"2","name":"女装"},
15       {"id":"15","pid":"7","name":"海尔空调"},
16       {"id":"16","pid":"7","name":"美的空调"},
17       {"id":"19","pid":"5","name":"加湿器"},
18       {"id":"20","pid":"5","name":"电熨斗"}
19       ]`);
20 
21       function transData(data, idStr, pidStr, chindrenStr) {
22         var arr = [],
23           hash = {},
24           id = idStr,
25           pid = pidStr,
26           children = chindrenStr;
27 
28         for (var i = 0; i < data.length; i++) {
29           hash[data[i][id]] = data[i];
30         }
31         for (var j = 0; j < data.length; j++) {
32           //data 中每一项
33           var arrVal = data[j],
34             //找父分类
35             hashVP = hash[arrVal[pid]];
36           //pid 不为 0
37           if (hashVP) {
38             !hashVP[children] && (hashVP[children] = []);
39             hashVP[children].push(arrVal);
40           }
41           //pid 为 0
42           else {
43             // 将data 的对象添加到数组中
44             arr.push(arrVal);
45           }
46         }
47         return arr;
48       }
49 
50       var jsonDataTree = transData(jsonData, 'id', 'pid', 'chindren');
51       console.log(jsonDataTree);