tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "outDir": "build",
    "rootDir": "./",
    "baseUrl": "./src",
    "moduleResolution": "node",
    "module": "esnext",
    "allowJs": true,
    "jsx": "react",
    "inlineSourceMap": true,
    "esModuleInterop": true,
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "traceResolution": false,
    "listEmittedFiles": false,
    "listFiles": false,
    "pretty": true,
    "downlevelIteration": true,
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "forceConsistentCasingInFileNames": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true
  },
  "compileOnSave": false,
  "include": [
    "src"
  ]
}