tsconfig.json

{
  // Change this to match your project
  "include": [".temp/*"],
  "compilerOptions": {
    "skipLibCheck": true,
    // Tells TypeScript to read JS files, as
    // normally they are ignored as source files
    "allowJs": true,
    // Generate d.ts files
    "declaration": true,
    // This compiler run should
    // only output d.ts files
    "emitDeclarationOnly": true,
    // Types should go into this directory.
    // Removing this would place the .d.ts files
    // next to the .js files
    "outDir": "types"
  }
}