feat: expose keepFnNames and keepClassNames options of builtin swc minfier

crates/node_binding/binding.d.ts

@@ -747,6 +747,8 @@ export interface RawLibraryOptions {
 export interface RawMinification {
   passes: number
   dropConsole: boolean
+  keepClassNames: boolean
+  keepFnNames: boolean
   comments: "all" | "some" | "false"
   asciiOnly: boolean
   pureFuncs: Array<string>

crates/rspack_binding_options/src/options/raw_builtins/raw_swc_js_minimizer.rs

@@ -30,6 +30,8 @@ pub struct RawMinificationConditions {
 pub struct RawMinification {
   pub passes: u32,
   pub drop_console: bool,
+  pub keep_class_names: bool,
+  pub keep_fn_names: bool,
   #[napi(ts_type = r#""all" | "some" | "false""#)]
   pub comments: String,
   pub ascii_only: bool,
@@ -59,6 +61,8 @@ impl TryFrom<RawMinification> for Minification {
     Ok(Self {
       passes: value.passes as usize,
       drop_console: value.drop_console,
+      keep_class_names: value.keep_class_names,
+      keep_fn_names: value.keep_fn_names,
       pure_funcs: value.pure_funcs,
       ascii_only: value.ascii_only,
       comments: value.comments,

crates/rspack_plugin_swc_js_minimizer/src/lib.rs

@@ -29,6 +29,8 @@ use swc_ecma_minifier::option::{
 pub struct Minification {
   pub passes: usize,
   pub drop_console: bool,
+  pub keep_class_names: bool,
+  pub keep_fn_names: bool,
   pub pure_funcs: Vec<String>,
   pub extract_comments: Option<String>,
   pub ascii_only: bool,
@@ -115,6 +117,12 @@ impl Plugin for SwcJsMinimizerPlugin {
       ..Default::default()
     };
 
+    let mangle = MangleOptions {
+      keep_class_names: minify_options.keep_class_names,
+      keep_fn_names: minify_options.keep_fn_names,
+      ..Default::default()
+    };
+
     let comments = match minify_options.comments.as_str() {
       "false" => JsMinifyCommentOption::False,
       "all" => JsMinifyCommentOption::PreserveAllComments,
@@ -146,13 +154,15 @@ impl Plugin for SwcJsMinimizerPlugin {
         let input_source_map = original_source.map(&MapOptions::default());
         let js_minify_options = JsMinifyOptions {
           compress: BoolOrDataConfig::from_obj(compress.clone()),
+          mangle: BoolOrDataConfig::from_obj(mangle.clone()),
           format: format.clone(),
           source_map: BoolOrDataConfig::from_bool(input_source_map.is_some()),
           inline_sources_content: true, /* Using true so original_source can be None in SourceMapSource */
           emit_source_map_columns,
           module: is_module,
           ..Default::default()
         };
+
         let output = match minify(
           &js_minify_options,
           input,
@@ -236,8 +246,8 @@ pub struct JsMinifyOptions {
   pub mangle: BoolOrDataConfig<MangleOptions>,
   pub format: JsMinifyFormatOptions,
   pub ecma: TerserEcmaVersion,
-  pub keep_classnames: bool,
-  pub keep_fnames: bool,
+  pub keep_class_names: bool,
+  pub keep_fn_names: bool,
   pub module: bool,
   pub safari10: bool,
   pub toplevel: bool,

crates/rspack_testing/test.config.scheme.json

@@ -346,6 +346,14 @@
           "default": false,
           "type": "boolean"
         },
+        "keepClassNames": {
+          "default": false,
+          "type": "boolean"
+        },
+        "keepFnNames": {
+          "default": false,
+          "type": "boolean"
+        },
         "extractComments": {
           "default": null,
           "type": [

packages/rspack/src/builtin-plugin/SwcJsMinimizerPlugin.ts

@@ -10,6 +10,8 @@ type MinifyConditions = MinifyCondition | MinifyCondition[];
 export type SwcJsMinimizerPluginOptions = {
 	passes?: number;
 	dropConsole?: boolean;
+	keepClassNames?: boolean;
+	keepFnNames?: boolean;
 	pureFuncs?: Array<string>;
 	extractComments?: boolean | RegExp;
 	comments?: false | "all" | "some";
@@ -58,6 +60,8 @@ export const SwcJsMinimizerPlugin = create(
 		return {
 			passes: options?.passes ?? 1,
 			dropConsole: options?.dropConsole ?? false,
+			keepClassNames: options?.keepClassNames ?? false,
+			keepFnNames: options?.keepFnNames ?? false,
 			pureFuncs: options?.pureFuncs ?? [],
 			comments: options?.comments ? options.comments : "false",
 			asciiOnly: options?.asciiOnly ?? false,

packages/rspack/tests/Stats.test.ts

@@ -34,7 +34,7 @@ describe("Stats", () => {
 		    entry ./fixtures/a
 		./fixtures/a.js [876] {main}
 		  entry ./fixtures/a
-		rspack compiled successfully (b32fac08a5e8721cacff)"
+		rspack compiled successfully (31124a919605602fc9ae)"
 	`);
 	});
 
@@ -79,7 +79,7 @@ describe("Stats", () => {
 
 
 
-		rspack compiled with 1 error (27ec1c09308b67dcfd6f)"
+		rspack compiled with 1 error (18c9b1da202481673984)"
 	`);
 	});
 

packages/rspack/tests/__snapshots__/Stats.test.ts.snap

@@ -156,7 +156,7 @@ exports[`Stats should have stats 1`] = `
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "b32fac08a5e8721cacff",
+  "hash": "31124a919605602fc9ae",
   "logging": {},
   "modules": [
     {
@@ -416,7 +416,7 @@ exports.c = require("./c?c=3");
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "5eccb83e369e53af1313",
+  "hash": "089a36c7767bb55f0574",
   "logging": {},
   "modules": [
     {

packages/rspack/tests/__snapshots__/StatsTestCases.test.ts.snap

@@ -188,7 +188,7 @@ import rawModule from './raw.png'",
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "31df38a93780ad25981d",
+  "hash": "94f12aa69d3989830e25",
   "logging": {},
   "modules": [
     {
@@ -337,7 +337,7 @@ chunk {main} bundle.js (main) [entry]
   entry ./index
 ./stringModule.js [363] {main}
   esm import ./stringModule [10]
-rspack compiled successfully (31df38a93780ad25981d)"
+rspack compiled successfully (94f12aa69d3989830e25)"
 `;
 
 exports[`StatsTestCases should print correct stats for filename 1`] = `
@@ -500,7 +500,7 @@ exports[`StatsTestCases should print correct stats for filename 1`] = `
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "7cdaa6ba61cec2cb7288",
+  "hash": "b1dbe683f73e6b1f7f2c",
   "logging": {},
   "modules": [
     {
@@ -602,7 +602,7 @@ chunk {main} main.xxxx.js (main) >{dynamic_js}< [entry]
   entry ./index
 ./dynamic.js [426] {dynamic_js}
   dynamic import ./dynamic [10]
-rspack compiled successfully (7cdaa6ba61cec2cb7288)"
+rspack compiled successfully (b1dbe683f73e6b1f7f2c)"
 `;
 
 exports[`StatsTestCases should print correct stats for hot+production 1`] = `
@@ -697,7 +697,7 @@ exports[`StatsTestCases should print correct stats for hot+production 1`] = `
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "d71f062b534cbc5af842",
+  "hash": "86548123ac24bd06a6bf",
   "logging": {},
   "modules": [
     {
@@ -760,7 +760,7 @@ chunk {main} bundle.js (main) [entry]
     entry ./index.js
 ./index.js [10] {main}
   entry ./index.js
-rspack compiled successfully (d71f062b534cbc5af842)"
+rspack compiled successfully (86548123ac24bd06a6bf)"
 `;
 
 exports[`StatsTestCases should print correct stats for identifier-let-strict-mode 1`] = `
@@ -2023,7 +2023,7 @@ console.log(a);
   ],
   "errorsCount": 1,
   "filteredModules": undefined,
-  "hash": "7d2d2ee1a9384ad715fa",
+  "hash": "6ca407f06f94c982125d",
   "logging": {},
   "modules": [
     {
@@ -2144,7 +2144,7 @@ error[internal]: Resolve error
 
 
 
-rspack compiled with 1 error (7d2d2ee1a9384ad715fa)"
+rspack compiled with 1 error (6ca407f06f94c982125d)"
 `;
 
 exports[`StatsTestCases should print correct stats for resolve-unexpected-exports-in-pkg 1`] = `
@@ -2288,7 +2288,7 @@ console.log(a);
   ],
   "errorsCount": 1,
   "filteredModules": undefined,
-  "hash": "d4ff2f3bc5aba8d564b3",
+  "hash": "a9093cd411993b4b9c01",
   "logging": {},
   "modules": [
     {
@@ -2403,7 +2403,7 @@ error[internal]: Export should be relative path and start with "./", but got ../
 
 
 
-rspack compiled with 1 error (d4ff2f3bc5aba8d564b3)"
+rspack compiled with 1 error (a9093cd411993b4b9c01)"
 `;
 
 exports[`StatsTestCases should print correct stats for simple 1`] = `
@@ -2498,7 +2498,7 @@ exports[`StatsTestCases should print correct stats for simple 1`] = `
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "44e8a78970b06279cd26",
+  "hash": "7a27fed57156f35cc7b2",
   "logging": {},
   "modules": [
     {
@@ -2561,7 +2561,7 @@ chunk {main} bundle.js (main) [entry]
     entry ./index
 ./index.js [10] {main}
   entry ./index
-rspack compiled successfully (44e8a78970b06279cd26)"
+rspack compiled successfully (7a27fed57156f35cc7b2)"
 `;
 
 exports[`StatsTestCases should print correct stats for simple-module-source 1`] = `
@@ -2722,7 +2722,7 @@ import rawModule from './raw.png'",
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "a563cef06d977112d3e1",
+  "hash": "ef78d0d53e6750a65525",
   "logging": {},
   "modules": [
     {
@@ -2849,7 +2849,7 @@ Entrypoint main 631 bytes = bundle.js
 ./raw.png
 ./index.js
 ./stringModule.js
-rspack compiled successfully (a563cef06d977112d3e1)"
+rspack compiled successfully (ef78d0d53e6750a65525)"
 `;
 
 exports[`StatsTestCases should print correct stats for stats-hooks 1`] = `
@@ -2943,7 +2943,7 @@ exports[`StatsTestCases should print correct stats for stats-hooks 1`] = `
   "errors": [],
   "errorsCount": 0,
   "filteredModules": undefined,
-  "hash": "44e8a78970b06279cd26",
+  "hash": "7a27fed57156f35cc7b2",
   "logging": {},
   "modules": [
     {
@@ -3000,7 +3000,7 @@ exports[`StatsTestCases should print correct stats for stats-hooks 2`] = `
 asset bundle.js 589 bytes [emitted111] (name: main) [testA: aaaaaa]
 Entrypoint main 589 bytes = bundle.js
 ./index.js
-rspack compiled successfully (44e8a78970b06279cd26)"
+rspack compiled successfully (7a27fed57156f35cc7b2)"
 `;
 
 exports[`StatsTestCases should print correct stats for try-require--module 1`] = `

packages/rspack/tests/configCases/builtins/minify-keep-classnames/index.js

@@ -0,0 +1,6 @@
+class KeepClass {}
+
+it("should keep class names", () => {
+	const name = KeepClass.name;
+	expect(name).toBe("KeepClass");
+});

packages/rspack/tests/configCases/builtins/minify-keep-classnames/webpack.config.js

@@ -0,0 +1,10 @@
+module.exports = {
+	builtins: {
+		minifyOptions: {
+			keepClassNames: true
+		}
+	},
+	optimization: {
+		minimize: true
+	}
+};

packages/rspack/tests/configCases/builtins/minify-keep-fn-names/index.js

@@ -0,0 +1,6 @@
+function main() {}
+
+it("should keep fn names", () => {
+	const name = main.name;
+	expect(name).toBe("main");
+});

packages/rspack/tests/configCases/builtins/minify-keep-fn-names/webpack.config.js

@@ -0,0 +1,10 @@
+module.exports = {
+	builtins: {
+		minifyOptions: {
+			keepFnNames: true
+		}
+	},
+	optimization: {
+		minimize: true
+	}
+};