{
  "compilerOptions": {
    "module": "none",
    "noImplicitAny": true,
    "strictNullChecks": true,
    "downlevelIteration": true,
    "target": "es5",
    "declaration": true,
    "outFile": "mvc.js"
  }
}

{
  "compilerOptions": {
    "module": "none",
    "noImplicitAny": true,
    "strictNullChecks": true,
    "downlevelIteration": true,
    "target": "es6",
    "declaration": true,
    "outFile": "mvc.js"
  }
}

Build to ES6 by default
Build to ES6 by default
