how to compare two date in typescript

1for(let k = 0; k < this.bookingDetailsArrayRealObject.length; k++){
2        let dateCheckOut = this.bookingDetailsArrayRealObject[k].package.chackout;
3        let dateToBeCheckOut = new Date(dateCheckOut);
4        let today = new Date();
5        //let today_test = new Date();
6        if(this.bookingDetailsArrayRealObject[k].status){
7          if(dateToBeCheckOut < today){
8            this.bookingIdsToBeUpdated.push(this.bookingDetailsArrayRealObject[k]._id);
9            window.alert('true');
10            console.log(today.toDateString());
11            console.log(dateToBeCheckOut.toDateString());
12            console.log(this.bookingDetailsArrayRealObject[k]);
13          }
14        }
15      }
16