vercel-labs/scriptc v0.0.23

on GitHub

0.0.23

Features

• Read-only Date values compile statically. Zero-argument and single-value construction, storage and passing, getTime/valueOf, toISOString, UTC and host-local calendar getters, and getTimezoneOffset lower through both backends. Construction applies ECMAScript TimeClip behavior, the supported ISO and certificate-date strings parse without an embedded engine, and valid extreme years retain calendar answers even beyond a platform CRT's native range.
• The native web surface grows response construction and fetch cancellation. new Response(body, init) covers the supported BodyInit, ResponseInit, header mutation, conversion, validation, and stream-error semantics, while AbortController supplies shared native signal state, abort events and reasons, and preflight or in-flight fetch cancellation across the static and dynamic tiers.
• fs.readSync accepts positioned reads. A numeric position reads without advancing the descriptor, while omitted, null, and -1 positions preserve current-offset behavior; validation order, zero-length reads, EOF, and partial Windows reads match Node.

Fixes

• Top-level await marks an implicit ES module. TypeScript and JavaScript files without an explicit import or export now follow Node 24's syntax detection, package-type precedence, module scoping, and require diagnostics instead of being misclassified as CommonJS.
• Cycle collection stays fast on large live heaps. The runtime now collects cycles generationally, promotes survivors, and schedules bounded mature passes, avoiding repeated whole-heap walks while retaining full sweeps for cross-generation garbage and shutdown auditing.
• Typed-array reads, writes, and lengths use specialized native lowering. Both backends emit operations directly from the IR element kind while preserving numeric coercion, bounds behavior, and receiver lifetime across side-effecting index and value expressions.