S.O.L.I.D Principles for JS with examples, see more at https://medium.com/p/db95b44e82e

SOLID_SRPExample.js

class User {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  setName(name) {
    this.name = name;
  }

  setAge(age) {
    this.age = age;
  }
}

class UserLogProxy {
  constructor() {
    this.logs = [];
  }

  get(target, propKey, receiver) {
    const UserLogScope = this;

    if (propKey === "logs") {
      return {
        get: () => this.getLogs(),
      };
    }

    const targetValue = Reflect.get(target, propKey, receiver);

    if (typeof targetValue === "function") {
      return function(...args) {
        UserLogScope.add(`Edited user ${propKey.replace("set", "")}`);

        return targetValue.bind(this, args);
      };
    } else {
      return targetValue;
    }
  }

  getLogs() {
    return this.logs;
  }

  add(message) {
    this.logs.push(message);
  }
}

const run = () => {
  const UserInstanceWithLogs = new Proxy(
    new User("Ricardo", 32),
    new UserLogProxy(),
  );

  UserInstanceWithLogs.setAge(33);
  UserInstanceWithLogs.setName("Ricardo Luz");
  console.log(UserInstanceWithLogs.logs.get());
};

run();