TypeScript 7 cheatsheet

TypeScript 7: tsconfig options

6 common TypeScript 7 tasks.

A solid starting tsconfig

A strict configuration for a Node.js project using ES modules.

{
  "compilerOptions": {
    "target": "ES2022",
    "module": "NodeNext",
    "strict": true,
    "skipLibCheck": true,
    "outDir": "dist"
  },
  "include": ["src"]
}

Turn on strict mode

Enable the family of strict type-checking options. Recommended for new code.

"strict": true

Treat indexed access as possibly undefined

Make array and object index access include undefined, catching missing-item bugs.

"noUncheckedIndexedAccess": true

Set up import aliases

Map an alias such as @/utils to a folder. Your bundler needs the same alias.

"baseUrl": ".",
"paths": { "@/*": ["src/*"] }

Skip checking declaration files

Speed up type-checking by not checking .d.ts files from libraries.

"skipLibCheck": true

Keep imports as written

Make import type and export type explicit, which suits type stripping and bundlers.

"verbatimModuleSyntax": true