typescript namespaces example

.gitignore

dist
node_modules
npm-debug.log

app.ts

/// <reference path="person.ts" />
/// <reference path="nation.ts" />

import Person = People.Person;
import Nation = People.Nation;

const nation: Nation = new Nation();
nation.add(new Person('John', 'Lennon'));
console.log(nation.count);

nation.ts

namespace People {

  export class Nation {
    private population: Person[] = [];
    add(person: Person): void {
      this.population.push(person);
    }
    get count(): number {
      return this.population.length;
    }
  }

}

package.json

{
  "scripts": {
    "compile": "./node_modules/.bin/tsc",
    "start": "npm run compile && node dist/app.js"
  },
  "devDependencies": {
    "typescript": "^2.0.9"
  }
}

person.ts

namespace People {

  export class Person {
    constructor(
      private firstName: string,
      private lastName: string
    ){}
  }

}

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "outFile": "dist/app.js"
  },
  "files": [
    "app.ts"
  ]
}

Run:

npm install
npm start