tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    // Project options
    "declaration": true,
    "jsx": "react",
    "lib": [
      "ES6",
      "dom"
    ], // Specifies which default set of type definitions to use ("DOM", "ES6", etc)
    "moduleResolution": "node",
    "outDir": "lib", // .js (as well as .d.ts, .js.map, etc.) files will be emitted into this directory.,
    "removeComments": true, // Strips all comments from TypeScript files when converting into JavaScript- you rarely read compiled code so this saves space
    "target": "ES6", // Target environment. Most modern browsers support ES6, but you may want to set it to newer or older. (defaults to ES3)
    
    // Strict Checks
    "strict": true,
    "alwaysStrict": true, // Ensures that your files are parsed in the ECMAScript strict mode, and emit “use strict” for each source file.
    "allowUnreachableCode": false, // Pick up dead code paths
    "noImplicitAny": true, // In some cases where no type annotations are present, TypeScript will fall back to a type of any for a variable when it cannot infer the type.
    "strictNullChecks": true, // When strictNullChecks is true, null and undefined have their own distinct types and you’ll get a type error if you try to use them where a concrete value is expected.
  
    // Linter Checks
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true, // Non-empty switch cases must break, return, or throw
    "noImplicitReturns": true,
    // "noUncheckedIndexedAccess": true, // Accessing index must always check for undefined
    "noUnusedLocals": true, // Report errors on unused local variables.
    "noUnusedParameters": true, // Report errors on unused parameters in functions
  },
  "include": [
    "./src"
  ]
}