tsconfig cheatsheet

tsconfig.json

{
  "compilerOptions": {
    // Environment Settings
    "module": "preserve",
    "lib": ["esnext"],
    "target": "esnext",
    "types": ["bun"],

    // Output
    "noEmit": true,

    // JS
    "checkJs": true,

    // Strict checks not handled by biome
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitReturns": true,

    // Only useful for class
    // "noImplicitOverride": true,

    // Only useful when we use try/catch
    // "useUnknownInCatchVariables": true,

    // We don't do side-effect imports
    // "noUncheckedSideEffectImports": true,

    // Only matter for typescript file?
    // "isolatedModules": true,
    // "verbatimModuleSyntax": true,
    // "erasableSyntaxOnly": true,

    // Works anyway even if not set?

    // Handled by biome
    // "allowUnreachableCode": false,
    // "allowUnusedLabels": false,
    // "noFallthroughCasesInSwitch": true,
    // "noUnusedLocals": true,
    // "noUnusedParameters": true,

    // Misc
    "skipLibCheck": true
  }
}