php json_encode()返回数据给JS 需要SON.parse()格式化才能用

1.控制器返回数据集

echo json_encode($res);die;

[{"id":805,"pid":803,"title":"\u5e7f\u5dde-\u7535\u8bdd\u987e\u95ee1"},{"id":804,"pid":803,"title":"\u5e7f\u5dde-\u7535\u8bdd\u987e\u95ee2"},

2.JS读取

        var data1 ;
            $.ajax({
                url:'{:url('register')}',
                type:"post",
                data:{action:'js_type',tid:{$tid},cid:{$cid},ccid:{$ccid}},
                async:false,
                success:function(data){
                  data1 = JSON.parse(data);
                  //console.log(data1);
                },
                error:function(){
                  layer.msg('读取数据失败！');
                }
            });
            
            //console.log(data1);
        //var data=[{"id":1,"pid":0,"title":"1-1"},{"id":2,"pid":0,"title":"1-2"},{"id":3,"pid":0,"title":"1-3"},{"id":4,"pid":1,"title":"1-1-1"},{"id":5,"pid":1,"title":"1-1-2"},{"id":6,"pid":2,"title":"1-2-1"},{"id":7,"pid":2,"title":"1-2-3"},{"id":8,"pid":3,"title":"1-3-1"},{"id":9,"pid":3,"title":"1-3-2"},{"id":10,"pid":4,"title":"1-1-1-1"},{"id":11,"pid":4,"title":"1-1-1-2"}];
        
        interact.render({
          elem : '.test',
          title : '选择联动',
          data : data1,
          name : 'region',
        });