function compareDate(){
                let date1 = '2021-04-01 08:00:00'
                let date2 = '2021-04-01 09:00:00'
                let DT1 = new Date(date1.replace(/-/g,"\/"))
                let DT2 = new Date(date2.replace(/-/g,"\/"))
                
                if(DT1 < DT2) {
                    console.log('date1 小于 date2')
                } else {
                    console.log('date1 大于 date2')
                }
            },