Typescript: How to call method defined with arrow function in base class using super keyword in child class?

Question

Given

class BaseClass{

  count:number=0;

  public someMethod=():void =>{
      this.count++;
  }
}

class ChildClass extends BaseClass{
  public someMe         


        

Answer 1

Without a function implementation in the prototype, there's no way for the derived class to 'find' the base class implementation. You can separate it out so that you have one method for preserving this and another for using via super:

class BaseClass {
  count: number = 0;

  someMethodImpl() {
    this.count++;
  }

  public someMethod = this.someMethodImpl;
}

class ChildClass extends BaseClass {
  public someMethod = (): void=> {
    super.someMethodImpl();
    //Do more work here.
  }
}