TypeScript

Config Commands

Configure TypeScript with tsconfig.json. Set compiler options, path aliases, strict mode settings, and project references for complex multi-package setups.

6 commands

Pro Tips

Use 'tsc --init' to generate a tsconfig.json with all options commented — great learning reference.

Enable 'strict: true' from the start. It's much harder to add strictness to an existing codebase.

Use 'paths' with 'baseUrl' for import aliases: '"@/*": ["./src/*"]' instead of '../../../'.

Common Mistakes

Path aliases in tsconfig only work for type resolution. You need bundler/runtime support (tsconfig-paths) for actual imports.

'skipLibCheck: true' speeds up compilation but may hide type errors in dependencies. Disable to catch issues early.

Commands

Initialize tsconfig

$ tsc --init

Create tsconfig.json with default settings.

Show effective config

$ tsc --showConfig

Display effective configuration after extending base configs.

List compiled files

$ tsc --listFiles

Print names of all files included in compilation.

Show compilation diagnostics

$ tsc --extendedDiagnostics

Show detailed performance diagnostics.

Trace module resolution

$ tsc --traceResolution

Show detailed module resolution process for debugging.

Set module resolution

$ tsc --moduleResolution bundler

Specify resolution strategy (NodeNext, node16, bundler).