feat(binding): Create Wasm package for stripping only TypeScript (#9124)

**Description:**

This PR adds a Wasm binding which is only capable of stripping TypeScript types.


**Related issue:**

 - marco-ippolito/node#2

.github/workflows/publish-core.yml

@@ -508,11 +508,14 @@ jobs:
  matrix:
  settings:
  - crate: "binding_core_wasm"
- npm: "@swc/wasm"
+ npm: "@swc\\/wasm"
  target: nodejs
  - crate: "binding_core_wasm"
- npm: "@swc/wasm-web"
+ npm: "@swc\\/wasm-web"
  target: web
+ - crate: "binding_typescript_wasm"
+ npm: "@swc\\/wasm-typescript"
+ target: no-modules
  steps:
  - uses: actions/checkout@v4
 

bindings/Cargo.toml

@@ -4,6 +4,7 @@ members = [
  "binding_core_wasm",
  "binding_minifier_node",
  "binding_minifier_wasm",
+ "binding_typescript_wasm",
  "swc_cli",
 ]
 resolver = "2"

bindings/binding_core_node/build.rs

@@ -17,7 +17,7 @@ fn main() {
  let out_dir = env::var("OUT_DIR").expect("Outdir should exist");
  let dest_path = Path::new(&out_dir).join("triple.txt");
  let mut f =
- BufWriter::new(File::create(&dest_path).expect("Failed to create target triple text"));
+ BufWriter::new(File::create(dest_path).expect("Failed to create target triple text"));
  write!(
  f,
  "{}",

bindings/binding_minifier_node/src/minify.rs

@@ -7,8 +7,7 @@ use napi::{
 };
 use serde::Deserialize;
 use swc_compiler_base::{
- minify_file_comments, parse_js, IdentCollector, IsModule, PrintArgs, SourceMapsConfig,
- TransformOutput,
+ minify_file_comments, parse_js, IdentCollector, PrintArgs, SourceMapsConfig, TransformOutput,
 };
 use swc_config::config_types::BoolOr;
 use swc_core::{
@@ -23,7 +22,7 @@ use swc_core::{
  js::{JsMinifyCommentOption, JsMinifyOptions},
  option::{MinifyOptions, TopLevelOptions},
  },
- parser::{EsConfig, Syntax},
+ parser::{EsSyntax, Syntax},
  transforms::base::{fixer::fixer, hygiene::hygiene, resolver},
  visit::{FoldWith, VisitMutWith, VisitWith},
  },
@@ -109,11 +108,30 @@ fn do_work(input: MinifyTarget, options: JsMinifyOptions) -> napi::Result<Transf
  ..Default::default()
  };
 
+ let comments = SingleThreadedComments::default();
+
+ let module = parse_js(
+ cm.clone(),
+ fm.clone(),
+ handler,
+ target,
+ Syntax::Es(EsSyntax {
+ jsx: true,
+ decorators: true,
+ decorators_before_export: true,
+ import_attributes: true,
+ ..Default::default()
+ }),
+ options.module,
+ Some(&comments),
+ )
+ .context("failed to parse input file")?;
+
  // top_level defaults to true if module is true
 
  // https://github.com/swc-project/swc/issues/2254
 
- if options.module {
+ if module.is_module() {
  if let Some(opts) = &mut min_opts.compress {
  if opts.top_level.is_none() {
  opts.top_level = Some(TopLevelOptions { functions: true });
@@ -136,25 +154,6 @@ fn do_work(input: MinifyTarget, options: JsMinifyOptions) -> napi::Result<Transf
  }
  }
 
- let comments = SingleThreadedComments::default();
-
- let module = parse_js(
- cm.clone(),
- fm.clone(),
- handler,
- target,
- Syntax::Es(EsConfig {
- jsx: true,
- decorators: true,
- decorators_before_export: true,
- import_attributes: true,
- ..Default::default()
- }),
- IsModule::Bool(options.module),
- Some(&comments),
- )
- .context("failed to parse input file")?;
-
  let source_map_names = if source_map.enabled() {
  let mut v = IdentCollector {
  names: Default::default(),
@@ -172,7 +171,7 @@ fn do_work(input: MinifyTarget, options: JsMinifyOptions) -> napi::Result<Transf
 
  let is_mangler_enabled = min_opts.mangle.is_some();
 
- let module = (|| {
+ let module = {
  let module = module.fold_with(&mut resolver(unresolved_mark, top_level_mark, false));
 
  let mut module = swc_core::ecma::minifier::optimize(
@@ -192,7 +191,7 @@ fn do_work(input: MinifyTarget, options: JsMinifyOptions) -> napi::Result<Transf
  }
  module.visit_mut_with(&mut fixer(Some(&comments as &dyn Comments)));
  module
- })();
+ };
 
  let preserve_comments = options
  .format
@@ -211,7 +210,7 @@ fn do_work(input: MinifyTarget, options: JsMinifyOptions) -> napi::Result<Transf
  inline_sources_content: options.inline_sources_content,
  source_map,
  source_map_names: &source_map_names,
- orig: orig.as_ref(),
+ orig,
  comments: Some(&comments),
  emit_source_map_columns: options.emit_source_map_columns,
  preamble: &options.format.preamble,

bindings/binding_typescript_wasm/Cargo.toml

@@ -0,0 +1,40 @@
+[package]
+authors = ["강동윤 <[email protected]>"]
+description = "wasm module for swc"
+edition = "2021"
+license = "Apache-2.0"
+name = "binding_typescript_wasm"
+publish = false
+repository = "https://github.com/swc-project/swc.git"
+version = "1.6.6"
+
+[lib]
+bench = false
+crate-type = ["cdylib"]
+
+[features]
+default = ["swc_v1"]
+swc_v1 = []
+swc_v2 = []
+
+[dependencies]
+anyhow = "1.0.66"
+getrandom = { version = "0.2.10", features = ["js"] }
+serde = { version = "1", features = ["derive"] }
+serde-wasm-bindgen = "0.4.5"
+serde_json = "1.0.120"
+swc_core = { version = "0.95.10", features = [
+ "ecma_ast_serde",
+ "ecma_codegen",
+ "ecma_transforms",
+ "ecma_transforms_typescript",
+ "ecma_visit",
+] }
+swc_ecma_codegen = { version = "0.151.1", features = ["serde-impl"] }
+swc_error_reporters = "0.18.0"
+tracing = { version = "0.1.37", features = ["max_level_off"] }
+wasm-bindgen = { version = "0.2.82", features = ["enable-interning"] }
+wasm-bindgen-futures = { version = "0.4.41" }
+
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = false

bindings/binding_typescript_wasm/package.json

@@ -0,0 +1,5 @@
+{
+ "devDependencies": {
+ "jest": "^25.1.0"
+ }
+}