Node.js v26 Is Here: What Actually Changed
Briefly

Node.js v26 Is Here: What Actually Changed
"Temporal API is now available without flags. This is one of the most important JavaScript improvements in years. It replaces many of the long-standing issues with Date, including immutable date/time objects and explicit timezone handling."
"Node.js v26 ships with V8 JavaScript engine 14.6. Notably, recent V8 updates include features such as the Upsert proposal and Iterator sequencing, which can impact performance characteristics without requiring changes in application code."
"Node.js v26 includes Undici 8 as part of the runtime. Notable updates in Undici 8 include continued alignment with the WHATWG Fetch specification and improvements in request lifecycle handling, which enhance the performance of outbound HTTP requests."
Node.js v26.0.0 has been released, focusing on modernization with key changes including the Temporal API enabled by default, V8 14.6, and Undici 8. The Temporal API addresses long-standing issues with date handling, offering immutable date/time objects and explicit timezone management. V8 14.6 introduces new features that can enhance performance without altering application code. Undici 8 improves the HTTP client capabilities, aligning with the WHATWG Fetch specification and enhancing request lifecycle handling. Additionally, new deprecations are introduced to streamline the platform.
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