TS2425

Class MyBaseClass defines instance member property logMyVariable, but extended class MyExtendedClass defines it as instance member function.

Broken Code ❌

abstract class MyBaseClass {
  myVariable: string;
  abstract logMyVariable: () => void;
}
 
export class MyExtendedClass extends MyBaseClass {
  logMyVariable() {
    console.log(this.myVariable);
  }
}

Fixed Code ✔️

To turn a function into a property of an instance member, you can use a class property initializer:

class MyBaseClass {
  myVariable: string;
  abstract myVariable = '123';
}
 
export class MyExtendedClass extends MyBaseClass {
  logMyVariable = () => {
    console.log(this.myVariable);
  };
}