I am comparing two date time fields in Apex.If start date and time is greater than end date,I have to display error in salesforceLightning component.
Datetime EventStartDate= datetime.valueOf(stringdate1);
Datetime EventEndDate= datetime.valueOf(stringdate2);
if(EventStartDate< EventEndDate){
//How to throw this error to javascript side
}
How to display error message in javascript side based on server side error.