tsconfig.json

{
  "compilerOptions": {
    "rootDir": "src",
    "outDir": "asap",
    "strict": true,
    "target": "es6",
    "module": "CommonJS",
    "sourceMap": true,
    "esModuleInterop": true
  },
  "exclude": ["node_modules", "examples"],
  "watchOptions": {
    // Use native file system events for files and directories
    "watchFile": "useFsEvents",
    "watchDirectory": "useFsEvents",
    // Poll files for updates more frequently
    // when they're updated a lot.
    "fallbackPolling": "dynamicPriority",
    // Don't coalesce watch notification
    "synchronousWatchDirectory": true,
    // Finally, two additional settings for reducing the amount of possible
    // files to track  work from these directories
    "excludeDirectories": ["**/node_modules"],
    "excludeFiles": ["build/fileWhichChangesOften.ts"]
  }
}