TaskClassFn

Represents the callback that is used by the taskClass property.

ts

 public taskCallback(dataItem: any): any {
   const moreThanHalfCompleted = dataItem.completionRatio > 0.5;
   return {
     'more-than-half': moreThanHalfCompleted,
     'less-than-half': !moreThanHalfCompleted
   };
 }