21CTO

Jun 25, 2024 · Fundamentals

TypeScript 5.5 Highlights: New Set API, Faster Builds, and Regex Checks

TypeScript 5.5 introduces inferred type predicates, enhanced regular‑expression checks, performance optimizations like faster transpileModule, reduced package size, new Set methods (union, intersection, difference, isSubsetOf), support for ECMAScript Set APIs, @import syntax, and a transpileDeclaration API, while addressing previous RC issues.