angular 引入本地js

#### 使用的地方

import { Lang } from '../../lib/en';

console.log(new Lang('1')['en']);
// '1'是传参

#### en.ts

export class Lang {
  public en = {
    "HOME": "Homeen",
    "ABOUT": "About Us",
    "CONTACT": "Contact Us",
  };
  constructor(obj?) {

  }
}