#alpha

Node 27's first alpha brings breaking changes

#​646 — November 5, 2026 Read on the Web Node.js 27 Alpha: The First Release Under Node's New Schedule — Under Node's new release model , each major release spends six months in alpha before stable release — so v27's final is due next April. Alphas are built from main with breaking changes, and are meant for library authors / testing rather than prod. V8 15.6 brings Math.sumPrecise() , Iterator.zip() and other iterator helpers by default, and import defer and immutable ArrayBuffer s are available behind flags. There's a new default heap limit of half of physical memory (clamped between 256MB a

Node Weekly · EN

Notable V8 changes from Node.js 26 to 27 (Alpha)

Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

Node.js Blog · EN

Node.js 27.0.0-alpha.0.0.0 (Alpha)

Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

Node.js Blog · EN