Add comments of how conditional import works

Author: maximegris

src/app/providers/electron.service.ts

@@ -1,5 +1,7 @@
 import { Injectable } from '@angular/core';
 
+// If you import a module but never use any of the imported values other than as TypeScript types,
+// the resulting javascript file will look as if you never imported the module at all.
 import { ipcRenderer } from 'electron';
 import * as childProcess from 'child_process';
 
@@ -10,6 +12,7 @@ export class ElectronService {
   childProcess: typeof childProcess;
 
   constructor() {
+    //Conditional imports
     if (this.isElectron()) {
       this.ipcRenderer = window.require('electron').ipcRenderer;
       this.childProcess = window.require('child_process');