mui 时间日期插件默认值的问题

 changeDate: function () {  
                let option = {  
                    "type": "date",  
                    beginYear:1950,  
                    endYear:2050,  
                    value: '2019-10',  
                };  

                let DatePicker = new mui.DtPicker(option);  
                DatePicker.setSelectedValue("1988-11-01",100,function () {  
                });  
                DatePicker.show(function (selectItem) {  
                    console.log(selectItem);  
                });  
            },

年份是可以的,但是月份和天居然是默认值,很是纳闷啊!