TypeScript 5.9 Brings Less Friction, More Features

Typescript 5.9 was released Aug. 1, with a slate of new features, including expandable hovers for preview, support for import defer and minimal and updated tsc --init.

Daniel Rosenwasser, the principal project manager for TypeScript, wrote that for the last few years, “running tsc --init created a very ‘full’ tsconfig.json, filled with commented-out settings and their descriptions.” The intent was to make options discoverable and easy to toggle, he explained.

“However, given external feedback (and our own experience), we found…