tsconfig.json

{
  "compilerOptions": {
    "target": "es5", // Specify ECMAScript target version
    "lib": ["dom", "dom.iterable", "esnext"], // List of library files to be included in the compilation
    "allowJs": true, // Allow JavaScript files to be compiled
    "skipLibCheck": true, // Skip type checking of all declaration files
    "esModuleInterop": true, // Disables namespace imports (import * as fs from "fs") and enables CJS/AMD/UMD style imports (import fs from "fs")
    "allowSyntheticDefaultImports": true, // Allow default imports from modules with no default export
    "strict": true, // Enable all strict type checking options
    "forceConsistentCasingInFileNames": true, // Disallow inconsistently-cased references to the same file.
    "module": "esnext", // Specify module code generation
    "moduleResolution": "node", // Resolve modules using Node.js style
    "resolveJsonModule": true, // Include modules imported with .json extension
    "noEmit": true, // Don't emit; allow Babel to transform files.
    "jsx": "react-jsx",
    "sourceMap": true, // Generate corrresponding .map file
    "declaration": true, // Generate corresponding .d.ts file
    "noUnusedLocals": true, // Report errors on unused locals
    "noUnusedParameters": true, // Report errors on unused parameters
    "experimentalDecorators": true, // Enables experimental support for ES decorators
    "noFallthroughCasesInSwitch": true, // Report errors for fallthrough cases in switch statement
    "baseUrl": "./src", // for absolute imports (import Button from 'components/Button';)
    "allowUnreachableCode": false,
    "noImplicitReturns": true,
    "importHelpers": true,
    "paths": {
      "@components/*": ["components/*"],
      "@configs/*": ["configs/*"],
      "@helpers/*": ["helpers/*"]
    }
  },
  "include": [
    "src" // *** The files TypeScript should type check ***
  ],
  "exclude": ["node_modules", "build", "public"]
}