{
  "compileOnSave": true,
  "compilerOptions": {
    "target": "es6",
    "sourceMap": true,
    "experimentalDecorators": true,
    "removeComments": true
  },
  "exclude": [
    "node_modules"
  ]
}
{
  "compileOnSave": true,
  "compilerOptions": {
    "target": "es5",
    "sourceMap": true,
    "experimentalDecorators": true,
    "removeComments": true
  },
  "exclude": [
    "node_modules"
  ]
}

Remove ES6 dependency of app.ts.
Remove ES6 dependency of app.ts.
