Lightning talk from John Wargo

on YouTube ↗05m

" summary

A concrete demo shows that adding @ts-check to a plain .js file makes Visual Studio Code run the TypeScript checker, surfacing real bugs: a wrong property name flagged instead of silently ignored (fixing readOnly vs read-only), a missing function call that turns an object comparison into a numeric test (add shipWeight()), and JSDoc-style type hints that change auto-complete from trend to trim so runtime errors get caught earlier.

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