When to Reach for TypeScript on a Vue App

TypeScript is valuable, but it is not free. On Vue projects I add it where the types catch real mistakes—and stay lighter where they mostly add noise.

Strong wins

• Shared data shapes — API responses, blog post metadata, app config
• Composables used in many places — a typed return value documents the contract
• Refactors across files — renaming a prop or field with confidence

interface BlogPost {
  _path: string;
  title: string;
  description: string;
  date: string;
  tags: string[];
}

Softer calls

Tiny one-off components, quick prototypes, and throwaway experiments often stay clearer in plain JavaScript. Forcing types on every local ref can slow you down without preventing bugs.

Meet in the middle

JSDoc or gradual typing works well: type the boundaries (fetch results, composable APIs) and leave simple presentational pieces looser until they stabilize.

Wrap-up

Use TypeScript where shared contracts matter. Skip the ceremony where the code is local, short-lived, and easy to reason about by eye.