TypeScript

.gitignore

dist
node_modules
npm-debug.log

person.ts

namespace People {
    export class Person {
        constructor(private firstName: string, private lastName: string){
            //TODO
        }
    }
}

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;
        }
    }
}

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);

package.json

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

tsconfig.json

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

Build

npm install
npm start

References

• Compatibility Tables for ES5
• Compatibility Tables for ES6
• Beginning of TypeScript