sap ui5 结束日期校验

<DatePicker
                                    placeholder=" "
                                    value="{
                                        path:'OtherModel>endDate'
                                    }"
                                    valueState="None"
                                    valueFormat="yyyy-MM-dd"
                                    displayFormat="yyyy-MM-dd"
                                    change=".onEndDateChange"
                                    maxDate="{FCDataJsonModel>/maxDate}"
                                    required="true"
                                    editable= "{= ${OtherModel>/useKey} ==='all'? true : false}"
                                    >
                                </DatePicker>

onEndDateChange(oEvent){
                                    const sValue = oEvent.getParameter('value');
                                    const endDate = new Date(sValue).getTime();
                                    let oControl = oEvent.getSource();
                                    let object = oControl.getBindingContext("OtherModel").getObject();
                                    let tag = /^\d{1,4}(-)(1[0-2]|0?[1-9])\1(0?[1-9]|[1-2]\d|30|31)$/.test(object.endDate);
                                    if(!tag) {
                                        MessageBox.error("非法的日期格式");
                                        oEvent.getSource().setValue("");
                                    }
                                    if(object.startDate) {
                                        let startDate = new Date(object.startDate).getTime();
                                        if(startDate > endDate) {
                                            oEvent.getSource().setValue("");
                                            MessageBox.error("结束日期不能早于开始日期");
                                        }
                                    }
                                },