Chris Tate
1e799cb60a
A TCP socket's write() answered nothing in typed code and true through
untyped values, and a 'drain' listener never fired. Node 24 answers
false when the bytes the write leaves unsent reach the socket's
65536-byte high-water mark (writeOrBuffer computes it after the socket
writes), sets needDrain, and emits 'drain' when the write buffer
empties; writes to an ended or destroyed socket answer false.
The runtime's write entry points now return that answer, record
needDrain, and fire the socket's 'drain' listeners from the flush that
empties the buffer, unless the write half is ending or the socket is
gone. writableLength reads the unsent bytes and writableNeedDrain the
flag. on('drain') and once('drain') register on the typed path and
through untyped values, and socket.write() may be used as a value.
The fallback node:net declarations type write() as boolean, add the
'drain' event and both properties.
RUNTIME_ABI_VERSION goes from 43 to 44: the socket write entry points
return a boolean.
scriptc
Compile TypeScript and JavaScript to native executables or WASI WebAssembly modules that run without Node.js installed.
$ cat fib.ts
function fib(n: number): number {
return n < 2 ? n : fib(n - 1) + fib(n - 2);
}
console.log(fib(30));
$ scriptc run fib.ts
832040
$ scriptc build fib.ts -o fib >/dev/null && ./fib
832040
scriptc compiles the same TypeScript you run on Node.js, type-checked by the TypeScript compiler. npm packages your program imports compile along with it. Code scriptc can't compile fails the build with an error code and, where available, a rewrite hint.
scriptc is experimental. See the limitations and the Node.js compatibility reference.
Install
$ npm install -g scriptc
npm installs the native compiler for your platform (macOS, Linux, or Windows). Node.js 24 or later is needed to install it and to run WASI modules with scriptc run; compiling and running executables doesn't need Node.js.
Building executables needs a linker and the platform SDK or sysroot, such as the Xcode Command Line Tools on macOS. Set SCRIPTC_LINKER to choose the linker driver. --emit=ir|llvm|asm|obj needs no external tools. See the quickstart for details.
Commands
scriptc build <file.ts>: compile to a native executable or another artifact selected with--emit.scriptc run <file.ts>: compile and run.scriptc coverage <file.ts>: report what compiles, and explain what doesn't.scriptc build --lib --profile <profile.json>: compile a static library, or a Wasm reactor onwasm32-wasi.
See the CLI reference for every option.
Cross-compilation and WebAssembly
Set SCRIPTC_TARGET to build for another platform, for example SCRIPTC_TARGET=aarch64-linux-gnu.2.36 or SCRIPTC_TARGET=wasm32-wasi. Install the matching @scriptc/runtime-<target> package in your project, at the same version as scriptc --version, or set SCRIPTC_RUNTIME_PACK to a runtime pack directory. See platform support and WebAssembly modules.
Native code
Call C functions by declaring their signatures in TypeScript and binding them to C symbols in a manifest passed with --ffi <manifest.json>. See the Native FFI guide.
Build cache
Builds reuse a bounded persistent cache. Set SCRIPTC_NO_CACHE=1 to bypass it or SCRIPTC_CACHE_DIR to choose its location.
Docs: scriptc.dev