{
  "compilerOptions": {
    "target": "es5",
    "resolveJsonModule": true,
    "sourceMap": true,
    "alwaysStrict": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "skipLibCheck": true,
    "lib": [
      "es2017", "dom"
    ]
  },
  "exclude": [
    "wwwroot",
    "node_modules"
  ]
}

{
  "compilerOptions": {
    "target": "es5",
    "resolveJsonModule": true,
    "sourceMap": true,
    "alwaysStrict": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "skipLibCheck": true,
    "lib": [
      "es2015", "dom"
    ]
  },
  "exclude": [
    "wwwroot",
    "node_modules"
  ]
}

Use es2015 library to be somewhat closer to the libraries that are default when targeting es5.
Use es2015 library to be somewhat closer to the libraries that are default when targeting es5.
