The most strict TypeScript tsconfig mode

tsconfig.json

{
  "compilerOptions": {
    // Strict Checks
    "alwaysStrict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "useUnknownInCatchVariables": true,
    "strictPropertyInitialization": true,
    "strictFunctionTypes": true,
    "noImplicitThis": true,
    "strictBindCallApply": true,
    "noPropertyAccessFromIndexSignature": true,
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true,
    // Linter Checks
    "noImplicitReturns": true,
    "noImplicitOverride": true,
    "forceConsistentCasingInFileNames": true,
    // https://eslint.org/docs/rules/consistent-return ?
    "noFallthroughCasesInSwitch": true,
    // https://eslint.org/docs/rules/no-fallthrough
    "noUnusedLocals": true,
    // https://eslint.org/docs/rules/no-unused-vars
    "noUnusedParameters": true,
    // https://eslint.org/docs/rules/no-unused-vars#args
    "allowUnreachableCode": false,
    // https://eslint.org/docs/rules/no-unreachable ?
    "allowUnusedLabels": false,
    // https://eslint.org/docs/rules/no-unused-labels
    // Base Strict Checks
    "noImplicitUseStrict": false,
    "suppressExcessPropertyErrors": false,
    "suppressImplicitAnyIndexErrors": false,
    "noStrictGenericChecks": false
  }
}

forceConsistentCasingInFileNames is true by default since 5.0.