[proxy] #js

proxy.js

/* eslint-disable max-classes-per-file */
class Repo {
  constructor() {
    this.name = 'maomao';
  }

  work(p1, p2) {
    return (p1 + p2);
  }

  hey(name) {
    return name;
  }
}

// if method is not defined on paginato,
// we want to try call on the this.repo with same params
class Paginator {
  constructor(repo) {
    this.repo = repo;
    this.name = 'yoyo';
  }

  work(p1, p2) {
    return (p1 * p2);
  }
}

const repo = new Repo();
const pa = new Paginator(repo);
const paginator = new Proxy(pa, {
  get: function get(target, name) {
    if (Object.prototype.hasOwnProperty.call(target, name)) {
      return target[name];
    }
    return function wrapper() {
      const args = Array.prototype.slice.call(arguments);

      if (typeof target[name] === 'function') {
        return target[name](...args);
      }

      return target.repo[name](...args);
    };
  },
});

console.log(paginator.work(9, 2));
console.log(paginator.hey('you'));
console.log(paginator.name);