@adrienlcp/tsconfig

The strictest TypeScript settings, for a project where tsc only checks and a bundler (Vite, tsdown) emits.

pnpm add -D @adrienlcp/tsconfig

{
  "compilerOptions": {
    "paths": { "@/*": ["./src/*"] }
  },
  "extends": "@adrienlcp/tsconfig/web-app.json",
  "include": ["scripts", "src", "vite.config.ts"]
}

| File | For | | --- | --- | | base.json | Any TypeScript: Node, a library, a script. lib: ["esnext"] | | web-app.json | A React app in the browser: base.json plus jsx: "react-jsx" and the DOM libs |

Every flag is on because a bug once paid for it: strict, noUncheckedIndexedAccess, noUnusedLocals / Parameters, noFallthroughCasesInSwitch, noImplicitOverride, erasableSyntaxOnly (no enum, no namespace with values, no parameter properties), verbatimModuleSyntax, noUncheckedSideEffectImports, allowUnreachableCode: false. noEmit is on: a library build sets noEmit: false in its own tsconfig.build.json.

paths, include and types stay in the project: TypeScript resolves paths against the file that declares them, so an alias set here would point inside node_modules.