refactor: remove unused SWC helpers

crates/rspack_javascript_compiler/src/ast.rs

@@ -5,7 +5,6 @@ use swc_core::{
   common::{GLOBALS, Globals, Mark, SourceMap, errors::Handler, sync::Lrc, util::take::Take},
   ecma::{
     ast::{Module, Program as SwcProgram},
-    transforms::base::helpers::{HELPERS, HelperData, Helpers},
     visit::{Fold, FoldWith, Visit, VisitMut, VisitMutWith, VisitWith},
   },
 };
@@ -73,7 +72,6 @@ impl Take for Program {
 /// Swc transform context
 pub struct Context {
   pub globals: Globals,
-  pub helpers: HelperData,
   pub top_level_mark: Mark,
   pub unresolved_mark: Mark,
   pub source_map: Arc<SourceMap>,
@@ -83,13 +81,10 @@ impl Context {
   pub fn new(source_map: Arc<SourceMap>, globals: Option<Globals>) -> Self {
     let globals = globals.unwrap_or_default();
     // generate preset mark & helpers
-    let (top_level_mark, unresolved_mark, helpers) = GLOBALS.set(&globals, || {
-      (Mark::new(), Mark::new(), Helpers::new(true).data())
-    });
+    let (top_level_mark, unresolved_mark) = GLOBALS.set(&globals, || (Mark::new(), Mark::new()));
 
     Self {
       globals,
-      helpers,
       top_level_mark,
       unresolved_mark,
       source_map,
@@ -100,7 +95,6 @@ impl Context {
 impl std::fmt::Debug for Context {
   fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
     f.debug_struct("Context")
-      .field("helpers", &self.helpers)
       .field("top_level_mark", &self.top_level_mark)
       .field("unresolved_mark", &self.unresolved_mark)
       .finish()
@@ -163,9 +157,7 @@ impl Ast {
     F: FnOnce(&mut Program, &Context) -> R,
   {
     let Self { program, context } = self;
-    GLOBALS.set(&context.globals, || {
-      HELPERS.set(&Helpers::from_data(context.helpers), || f(program, context))
-    })
+    GLOBALS.set(&context.globals, || f(program, context))
   }
 
   pub fn transform_with_handler<F, R>(&mut self, cm: Lrc<SourceMap>, f: F) -> Result<R, BatchErrors>
@@ -184,8 +176,6 @@ impl Ast {
     F: FnOnce(&Program, &Context) -> R,
   {
     let Self { program, context } = self;
-    GLOBALS.set(&context.globals, || {
-      HELPERS.set(&Helpers::from_data(context.helpers), || f(program, context))
-    })
+    GLOBALS.set(&context.globals, || f(program, context))
   }
 }

crates/rspack_javascript_compiler/src/compiler/minify.rs

@@ -21,7 +21,6 @@ use swc_core::{
     parser::{EsSyntax, Syntax},
     transforms::base::{
       fixer::{fixer, paren_remover},
-      helpers::{self, Helpers},
       hygiene::hygiene,
       resolver,
     },
@@ -139,29 +138,27 @@ impl JavaScriptCompiler {
 
         let is_mangler_enabled = min_opts.mangle.is_some();
 
-        let program = helpers::HELPERS.set(&Helpers::new(false), || {
-          HANDLER.set(handler, || {
-            let program = program
-              .apply(&mut resolver(unresolved_mark, top_level_mark, false))
-              .apply(&mut paren_remover(Some(&comments as &dyn Comments)));
-            let mut program = swc_ecma_minifier::optimize(
-              program,
-              self.cm.clone(),
-              Some(&comments),
-              None,
-              &min_opts,
-              &swc_ecma_minifier::option::ExtraOptions {
-                unresolved_mark,
-                top_level_mark,
-                mangle_name_cache: None,
-              },
-            );
-
-            if !is_mangler_enabled {
-              program.visit_mut_with(&mut hygiene())
-            }
-            program.apply(&mut fixer(Some(&comments as &dyn Comments)))
-          })
+        let program = HANDLER.set(handler, || {
+          let program = program
+            .apply(&mut resolver(unresolved_mark, top_level_mark, false))
+            .apply(&mut paren_remover(Some(&comments as &dyn Comments)));
+          let mut program = swc_ecma_minifier::optimize(
+            program,
+            self.cm.clone(),
+            Some(&comments),
+            None,
+            &min_opts,
+            &swc_ecma_minifier::option::ExtraOptions {
+              unresolved_mark,
+              top_level_mark,
+              mangle_name_cache: None,
+            },
+          );
+
+          if !is_mangler_enabled {
+            program.visit_mut_with(&mut hygiene())
+          }
+          program.apply(&mut fixer(Some(&comments as &dyn Comments)))
         });
 
         if let Some(op) = comments_op {