{
  "compilerOptions": {
    "experimentalDecorators": true,
    "module": "commonjs",
    "declaration": true,
    "noEmitOnError": true,
    "target": "es5",
    "lib": ["es5", "es6", "es2015.collection", "es2015.iterable", "dom"],
    "jsx": "react",
    "types": ["node", "mocha"],

    "noImplicitAny": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "strictNullChecks": true
  },
  "include": [
    "src/*.ts",
    "test/*.ts"
  ]
}

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "module": "commonjs",
    "declaration": true,
    "noEmitOnError": true,
    "target": "es5",
    "lib": ["es5", "es6", "es2015.collection", "es2015.iterable", "dom"],
    "jsx": "react",
    "types": ["node", "mocha"],
    "downlevelIteration": true,

    "noImplicitAny": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "strictNullChecks": true
  },
  "include": [
    "src/*.ts",
    "test/*.ts"
  ]
}

Use the TypeScript compiler support for downleveling ES5 iteration.
Use the TypeScript compiler support for downleveling ES5 iteration.
