How to access variable in TypeScript after the file bundled?

Question

I am new in TypeScript, I wrote some simple classes and methods but I don't know how to access to them!

I used gulp via browserify, tsify to bundle my .ts files to one file.

Imagine the main class name is library and here is that:

import {something} from "./someWhere";

class libraryClass{
  //Some code here too... 
}


var library = new libraryClass();

var testVar = "TypeScript";

now when I compile and bundle my files to one .js file, what I have inside the code works as expected (such as console.log(s)), but, how can I access my libraryClass class? How can I access the methods inside libraryClass class?!

Accessing the libraryClass does not work, nor testVar

example:

console.log(library)
console.log(testVar)

Both returns

Uncaught ReferenceError: library is not defined Uncaught

ReferenceError: testVar is not defined

Here is my tsconfig.json:

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true,
    "lib": ["dom", "es2015.promise", "es5"]
  },
  "exclude": [
    "node_modules"
  ],
  "include": [
    "src/**/*"
  ]
}