Microsoft shipped the latest iteration of its type-infused superset of JavaScript, TypeScript 5.5, introducing inferred type predicates, control flow narrowing, JSDoc @import and other enhancements.
TypeScript 6.0 is the last release built on the JavaScript codebase. A new --stableTypeOrdering flag lets developers match TypeScript 7.0 behavior. TypeScript 7.0, written in Go, is "extremely close ...