js_puzzler.js

class Greeter {
  constructor(greeting) {
    this.greeting = greeting;
  }

  call(message) {
    console.log(`${message}, ${this.greeting}`);
  }
}

const greeter = new Greeter('Dude');

greeter.call('Hello');

const p = new Promise((res, rej) => rej('oh, man!')).catch(greeter.call);

const detatchCaller = greeter.call;

detatchCaller('omg');