title: Export multiple variable from .ts file and import into another file in angular 4
body: <p>I want to create <code>config.ts</code> file which stores the global values of my app. 
  For that I'm able to used it by this way. </p>
  
  <p><code>module.exports.key = "My key";</code> But I need export multiple values approx 20-30.
  So is there any way? so I don't have to write <code>module.exports</code> every time... </p>