**Description:**
## Bugfixes
- Exported `let`/`var` declarations in TypeScript namespaces should be mutable.
- Fix missing declaration of complex exported patterns in TypeScript namespaces.
- Preserve concrete TS namespaces.
## New Features
- Introducing [Verbatim Module Syntax](https://www.typescriptlang.org/tsconfig#verbatimModuleSyntax).
- Enum value will now be inlined whenever possible within a single module, optimizing runtime performance.
- Constant enums will be automatically eliminated when feasible, This can reduce bundle size.
- Added support for cross-referencing enum values.
## Deprecated
`TsEnumConfig` is deprecated
- The `treat_const_enum_as_enum` transform option is deprecated.
- The `ts_enum_is_readonly` assumption option is deprecated.
**BREAKING CHANGE:**
TypeScript Config is changed.
**Related issue:**
- Closes#5197
- Closes#5259
- Closes#7177
- Closes#7453
- Closes#7676
- Closes#7681
- Closes#7791
- Closes#7961
**Description:**
Previously it was impossible to minify non-strict code (e.g. `delete identifier;`) because `minify()` unconditionally parsed the input as a module regardless of the `module` setting.
**BREAKING CHANGE:**
`minify()` now respects the `module` parameter instead of ignoring it, so users who had been processing modules with `minify()` without passing `{ module: true }` will now need to pass it.
**Related issue**
- Closes#6130.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
**Description:**
- `jsc.experimental.keepImportAssertions` is renamed to `jsc.experimental.keepImportAttributes`.
- `jsc.experimental.emitAssertForImportAttributes` is added.
**Related issue:**
- Closes#7908
**Description:**
This adds the ability to not include `ahash` with swc_common, which
caused some issues for me compiling dprint-plugin-typescript to Wasm
because of:
```
Compiling ahash v0.8.3
Compiling getrandom v0.2.10
error: the wasm*-unknown-unknown targets are not supported by default, you may need to enable the "js" feature. For more information see: https://docs.rs/getrandom/#webassembly-support
--> C:\Users\david\.cargo\registry\src\index.crates.io-6f17d22bba15001f\getrandom-0.2.10\src\lib.rs:285:9
|
285 | / compile_error!("the wasm*-unknown-unknown targets are not supported by \
286 | | default, you may need to enable the \"js\" feature. \
287 | | For more information see: \
288 | | https://docs.rs/getrandom/#webassembly-support");
| |________________________________________________________________________^
```
(I can't enable the JS feature because it's running the wasm file in
Wasmer and also I don't support Wasi in dprint plugins)
**BREAKING CHANGE:**
This removes swc_common's "perf" feature and makes it the default, then
adds an `ahash` feature instead. An alternative would be to make the
`ahash` dep optional and part of the default features, then do
`default-features = false` in the downstream crates (I think, but I'm
not sure), but I figure most people will be using the perf default
anyway? I'm not sure what's preferable.
**Related issue:**
- Closes#7729.
