tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "useDefineForClassFields": true,
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "module": "ESNext",
    "skipLibCheck": true,

    /* Bundler mode */
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",

    /* Linting */
    "strict": true,
    // I prefer to handle noUnusedLocals behavior via lint rules
    "noUnusedLocals": false,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true,
    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
    "strictNullChecks": true /* When type checking, take into account `null` and `undefined`. */,
    "strictFunctionTypes": true /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */,
    "strictBindCallApply": true /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */,
    "strictPropertyInitialization": true /* Check for class properties that are declared but not set in the constructor. */,
    "noImplicitThis": true /* Enable error reporting when `this` is given the type `any`. */,
    // "useUnknownInCatchVariables": true,               /* Type catch clause variables as 'unknown' instead of 'any'. */
    "alwaysStrict": true /* Ensure 'use strict' is always emitted. */,
    "noImplicitReturns": true /* Enable error reporting for codepaths that do not explicitly return in a function. */,
    "noImplicitOverride": true /* Ensure overriding members in derived classes are marked with an override modifier. */,
    "noPropertyAccessFromIndexSignature": true /* Enforces using indexed accessors for keys declared using an indexed type */,
    "allowUnusedLabels": false /* Disable error reporting for unused labels. */,
    "allowUnreachableCode": false /* Disable error reporting for unreachable code. */,

    /* JavaScript Support */
    "allowJs": true /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */,
    "checkJs": true /* Enable error reporting in type-checked JavaScript files. */
  },
  "include": ["src"],
  "references": [{"path": "./tsconfig.node.json"}]
}