TypeScript

TypeScript is a superset of JavaScript that adds a static type system to the language, allowing a large proportion of errors to be detected from the development phase.

It makes the code more readable, easier to maintain, and better documented, making it a de facto standard in the majority of modern front-end and back-end projects.

TypeScript in practice

Why TypeScript has become the norm

Error detection at the time of writing, not in production.
Powerful auto-completion and navigation in the IDE.
Living documentation via types.
Adopted by all major frameworks: React, Vue, Angular, Next.js.

Best practices

Enable strict: trueintsconfig.jsonfrom the outset.
Rigorously type the boundaries (API, database), with more flexibility internally.
Use Zod or Valibot to validate external data at runtime.

Caveats

Types do not replace tests: they detect one class of errors, not all.
On existing JavaScript, migrate gradually rather than all at once.

How Galadrim can support you

See our offering Node.js / TypeScript Development.

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