TypeScript asserts and Type Predicates in 2026: Writing Guards That Actually Narrow Correctly This article was written with the assistance of AI, under human supervision and review. Most TypeScript runtime validation breaks down because engineers write guards that compile but don't actually narr...
Source: [Dev.to](https://dev.to/jsmanifest/typescript-asserts-and-type-predicates-in-2026-writing-guards-that-actually-narrow-correctly-3kid)