Vujes form check if selected date is greater than tomorrow

His I want to check if the datetime select by user is greater than tomorrow and return to him an error.

This is my script. Please help me .

callFunction: function () {

      var tomorrow = new Date();
      var date = tomorrow.getFullYear()+'-'+(tomorrow.getMonth()+1)+'-'+(tomorrow.getDate() + 1);
      var time = tomorrow.getHours() + ":" + tomorrow.getMinutes() + ":" + tomorrow.getSeconds();
      var dateTime = date+' '+time;

      if(this.form.start >= dateTime){
        swal.fire(
            'Oops !',
            'The date you have chosen must be more than 24 hours.',
            'warning'
          )
      }
      console.log(dateTime);
    }