dummy-di.js

class Super {
  constructor() {
    this.log = new.target.DI('log');
  }
  static DI(name) {
    if (name === 'log') return console.log;
  }
}
class Sub extends Super {
  static DI(name) {
    if (name === 'err') return console.error;
    else return super.DI();
  }
}