ChangeLog: v1.3.81
Bugfixes
for codegen of yield
The fix was quite trivial.
for explicit resource management
Previously, the transforms for explicit resource management proposal were not applied.
for block scoping
The fix was quite trivial.
for jsc.paths
SWC now does not create an absolute path on Windows. Previously, if the JavaScript package passed a non-UNC absolute path as jsc.baseUrl
, SWC used absolute paths in the output.
for miniifer
The code change is ridiculous, but it fixed a bug.
New features
Support for import attributes
You can enable this for EcmaScript by setting jsc.parser.importAttributes
to true
, and for TypeScript this is unconditionally enabled.
Performance improvements
memchr
update
SWC will now use SIMD on arm64, including Apple Silicon for memchr
.
Experiments
New experimental option
disableBuiltinTransformsForInternalTesting
I added jsc.experimental.disableBuiltinTransformsForInternalTesting
to allow applying only Wasm plugins to input files.
const { code } = await swc.transform(
`
const hello: Type = () => {
console.log('hello');
};
`,
{
jsc: {
parser: {
syntax: "typescript",
},
experimental: {
disableBuiltinTransformsForInternalTesting: true,
},
},
minify: false,
}
);
swc-info
You can run npx swc-info@latest -y
to provide the necessary information to the team while reporting an issue.
Operating System:
Platform: darwin
Arch: arm64
Machine Type: arm64
Version: Darwin Kernel Version 22.5.0: Thu Jun 8 22:22:20 PDT 2023; root:xnu-8796.121.3~7/RELEASE_ARM64_T6000
CPU: (10 cores)
Models: Apple M1 Max
Binaries:
Node: 18.16.0
npm: 9.5.1
Yarn: 1.22.19
pnpm: 8.3.1
Relevant Packages:
@swc/core: 1.3.18
@swc/helpers: 0.4.11
@swc/types: N/A
typescript: 4.8.4
SWC Config:
output: N/A
.swcrc path: N/A
Next.js info:
output: N/A