feat(codegen): print vite / webpack special comments (#6021)

Related: https://github.com/oxc-project/oxc/issues/1046#issuecomment-2347345319
Close: #6024

crates/oxc_codegen/src/comment.rs

@@ -26,21 +26,54 @@ impl<'a> Codegen<'a> {
         }
     }
 
-    pub fn has_annotation_comments(&self, start: u32) -> bool {
+    pub fn has_comment(&self, start: u32) -> bool {
+        self.comments.contains_key(&start)
+    }
+
+    pub fn has_annotation_comment(&self, start: u32) -> bool {
         let Some(source_text) = self.source_text else { return false };
         self.comments.get(&start).is_some_and(|comments| {
-            comments.iter().any(|comment| Self::is_annotation_comments(comment, source_text))
+            comments.iter().any(|comment| Self::is_annotation_comment(comment, source_text))
+        })
+    }
+
+    pub fn has_non_annotation_comment(&self, start: u32) -> bool {
+        let Some(source_text) = self.source_text else { return false };
+        self.comments.get(&start).is_some_and(|comments| {
+            comments.iter().any(|comment| !Self::is_annotation_comment(comment, source_text))
         })
     }
 
     /// Weather to keep leading comments.
     fn is_leading_comments(comment: &Comment, source_text: &str) -> bool {
-        (comment.is_jsdoc(source_text) || (comment.is_line() && Self::is_annotation_comments(comment, source_text)))
+        (comment.is_jsdoc(source_text) || (comment.is_line() && Self::is_annotation_comment(comment, source_text)))
             && comment.preceded_by_newline
             // webpack comment `/*****/`
             && !comment.span.source_text(source_text).chars().all(|c| c == '*')
     }
 
+    fn print_comment(&mut self, comment: &Comment, source_text: &str) {
+        let comment_source = comment.real_span().source_text(source_text);
+        match comment.kind {
+            CommentKind::Line => {
+                self.print_str(comment_source);
+            }
+            CommentKind::Block => {
+                // Print block comments with our own indentation.
+                let lines = comment_source.split(is_line_terminator);
+                for line in lines {
+                    if !line.starts_with("/*") {
+                        self.print_indent();
+                    }
+                    self.print_str(line.trim_start());
+                    if !line.ends_with("*/") {
+                        self.print_hard_newline();
+                    }
+                }
+            }
+        }
+    }
+
     pub(crate) fn print_leading_comments(&mut self, start: u32) {
         if self.options.minify {
             return;
@@ -68,25 +101,7 @@ impl<'a> Codegen<'a> {
                 self.print_indent();
             }
 
-            let comment_source = comment.real_span().source_text(source_text);
+            self.print_comment(comment, source_text);
-            match comment.kind {
-                CommentKind::Line => {
-                    self.print_str(comment_source);
-                }
-                CommentKind::Block => {
-                    // Print block comments with our own indentation.
-                    let lines = comment_source.split(is_line_terminator);
-                    for line in lines {
-                        if !line.starts_with("/*") {
-                            self.print_indent();
-                        }
-                        self.print_str(line.trim_start());
-                        if !line.ends_with("*/") {
-                            self.print_hard_newline();
-                        }
-                    }
-                }
-            }
         }
 
         if comments.last().is_some_and(|c| c.is_line() || c.followed_by_newline) {
@@ -99,7 +114,7 @@ impl<'a> Codegen<'a> {
         }
     }
 
-    fn is_annotation_comments(comment: &Comment, source_text: &str) -> bool {
+    fn is_annotation_comment(comment: &Comment, source_text: &str) -> bool {
         let comment_content = comment.span.source_text(source_text);
         ANNOTATION_MATCHER.find_iter(comment_content).count() != 0
     }
@@ -116,11 +131,40 @@ impl<'a> Codegen<'a> {
         let Some(comments) = self.comments.remove(&start) else { return };
 
         for comment in comments {
-            if !Self::is_annotation_comments(&comment, source_text) {
+            if !Self::is_annotation_comment(&comment, source_text) {
                 continue;
             }
             self.print_str(comment.real_span().source_text(source_text));
             self.print_hard_space();
         }
     }
+
+    pub(crate) fn print_expr_comments(&mut self, start: u32) -> bool {
+        if self.options.minify {
+            return false;
+        }
+        let Some(source_text) = self.source_text else { return false };
+        let Some(comments) = self.comments.remove(&start) else { return false };
+
+        let (annotation_comments, comments): (Vec<_>, Vec<_>) = comments
+            .into_iter()
+            .partition(|comment| Self::is_annotation_comment(comment, source_text));
+
+        if !annotation_comments.is_empty() {
+            self.comments.insert(start, annotation_comments);
+        }
+
+        for comment in &comments {
+            self.print_hard_newline();
+            self.print_indent();
+            self.print_comment(comment, source_text);
+        }
+
+        if comments.is_empty() {
+            false
+        } else {
+            self.print_hard_newline();
+            true
+        }
+    }
 }

crates/oxc_codegen/src/gen.rs

@@ -562,7 +562,7 @@ impl<'a> Gen for VariableDeclaration<'a> {
             && p.start_of_annotation_comment.is_none()
             && matches!(self.kind, VariableDeclarationKind::Const)
             && matches!(self.declarations.first(), Some(VariableDeclarator { init: Some(init), .. }) if init.is_function())
-            && p.has_annotation_comments(self.span.start)
+            && p.has_annotation_comment(self.span.start)
         {
             p.start_of_annotation_comment = Some(self.span.start);
         }
@@ -834,7 +834,7 @@ impl<'a> Gen for ExportNamedDeclaration<'a> {
                     if matches!(var_decl.kind, VariableDeclarationKind::Const) =>
                 {
                     if matches!(var_decl.declarations.first(), Some(VariableDeclarator { init: Some(init), .. }) if init.is_function())
-                        && p.has_annotation_comments(self.span.start)
+                        && p.has_annotation_comment(self.span.start)
                     {
                         p.start_of_annotation_comment = Some(self.span.start);
                     }
@@ -1368,7 +1368,7 @@ impl<'a> GenExpr for CallExpression<'a> {
     fn gen_expr(&self, p: &mut Codegen, precedence: Precedence, ctx: Context) {
         let is_export_default = p.start_of_default_export == p.code_len();
         let mut wrap = precedence >= Precedence::New || ctx.intersects(Context::FORBID_CALL);
-        if p.has_annotation_comments(self.span.start) && precedence >= Precedence::Postfix {
+        if p.has_annotation_comment(self.span.start) && precedence >= Precedence::Postfix {
             wrap = true;
         }
 
@@ -1386,7 +1386,19 @@ impl<'a> GenExpr for CallExpression<'a> {
                 type_parameters.print(p, ctx);
             }
             p.print_char(b'(');
+            let has_comment = (self.span.end > 0 && p.has_comment(self.span.end - 1))
+                || self.arguments.iter().any(|item| p.has_comment(item.span().start));
+            if has_comment {
+                p.indent();
+                p.print_list_with_comments(&self.arguments, ctx);
+                // Handle `/* comment */);`
+                if !p.print_expr_comments(self.span.end - 1) {
+                    p.print_soft_newline();
+                }
+                p.dedent();
+            } else {
                 p.print_list(&self.arguments, ctx);
+            }
             p.print_char(b')');
             p.add_source_mapping(self.span.end);
         });
@@ -1949,14 +1961,40 @@ impl<'a> GenExpr for SequenceExpression<'a> {
 impl<'a> GenExpr for ImportExpression<'a> {
     fn gen_expr(&self, p: &mut Codegen, precedence: Precedence, ctx: Context) {
         let wrap = precedence >= Precedence::New || ctx.intersects(Context::FORBID_CALL);
+        let has_comment = (self.span.end > 0 && p.has_comment(self.span.end - 1))
+            || p.has_comment(self.source.span().start)
+            || self.arguments.first().is_some_and(|argument| p.has_comment(argument.span().start));
+
         p.wrap(wrap, |p| {
             p.add_source_mapping(self.span.start);
             p.print_str("import(");
+            if has_comment {
+                p.indent();
+            }
+            if p.print_expr_comments(self.source.span().start) {
+                p.print_indent();
+            } else if has_comment {
+                p.print_soft_newline();
+                p.print_indent();
+            }
             self.source.print_expr(p, Precedence::Comma, Context::empty());
             if !self.arguments.is_empty() {
                 p.print_comma();
+                if has_comment {
+                    p.print_soft_newline();
+                    p.print_indent();
+                } else {
+                    p.print_soft_space();
+                }
                 p.print_expressions(&self.arguments, Precedence::Comma, Context::empty());
             }
+            if has_comment {
+                // Handle `/* comment */);`
+                if !p.print_expr_comments(self.span.end - 1) {
+                    p.print_soft_newline();
+                }
+                p.dedent();
+            }
             p.print_char(b')');
         });
     }
@@ -2024,7 +2062,7 @@ impl<'a> GenExpr for ChainExpression<'a> {
 impl<'a> GenExpr for NewExpression<'a> {
     fn gen_expr(&self, p: &mut Codegen, precedence: Precedence, ctx: Context) {
         let mut wrap = precedence >= self.precedence();
-        if p.has_annotation_comments(self.span.start) && precedence >= Precedence::Postfix {
+        if p.has_annotation_comment(self.span.start) && precedence >= Precedence::Postfix {
             wrap = true;
         }
         p.wrap(wrap, |p| {
@@ -2034,7 +2072,19 @@ impl<'a> GenExpr for NewExpression<'a> {
             p.print_str("new ");
             self.callee.print_expr(p, Precedence::New, Context::FORBID_CALL);
             p.print_char(b'(');
+            let has_comment = p.has_comment(self.span.end - 1)
+                || self.arguments.iter().any(|item| p.has_comment(item.span().start));
+            if has_comment {
+                p.indent();
+                p.print_list_with_comments(&self.arguments, ctx);
+                // Handle `/* comment */);`
+                if !p.print_expr_comments(self.span.end - 1) {
+                    p.print_soft_newline();
+                }
+                p.dedent();
+            } else {
                 p.print_list(&self.arguments, ctx);
+            }
             p.print_char(b')');
         });
     }

crates/oxc_codegen/src/lib.rs

@@ -17,7 +17,7 @@ use oxc_ast::{
     Trivias,
 };
 use oxc_mangler::Mangler;
-use oxc_span::Span;
+use oxc_span::{GetSpan, Span};
 use oxc_syntax::{
     identifier::is_identifier_part,
     operator::{BinaryOperator, UnaryOperator, UpdateOperator},
@@ -468,6 +468,22 @@ impl<'a> Codegen<'a> {
         }
     }
 
+    fn print_list_with_comments<T: Gen + GetSpan>(&mut self, items: &[T], ctx: Context) {
+        for (index, item) in items.iter().enumerate() {
+            if index != 0 {
+                self.print_comma();
+            }
+            if self.has_non_annotation_comment(item.span().start) {
+                self.print_expr_comments(item.span().start);
+                self.print_indent();
+            } else {
+                self.print_soft_newline();
+                self.print_indent();
+            }
+            item.print(self, ctx);
+        }
+    }
+
     fn print_expressions<T: GenExpr>(&mut self, items: &[T], precedence: Precedence, ctx: Context) {
         for (index, item) in items.iter().enumerate() {
             if index != 0 {

crates/oxc_codegen/tests/integration/esbuild.rs

@@ -180,32 +180,39 @@ fn test_new() {
     // test_minify("new x() ** 2", "new x**2;");
 
     // Test preservation of Webpack-specific comments
+    // TODO: Not support trailing comments yet
     // test(
     // "new Worker(// webpackFoo: 1\n // webpackBar: 2\n 'path');",
     // "new Worker(\n  // webpackFoo: 1\n  // webpackBar: 2\n  \"path\"\n);\n",
     // );
-    // test(
+    test(
-    // "new Worker(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path');",
+        "new Worker(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path');",
-    // "new Worker(\n  /* webpackFoo: 1 */\n  /* webpackBar: 2 */\n  \"path\"\n);\n",
+        "new Worker(\n\t/* webpackFoo: 1 */\n\t/* webpackBar: 2 */\n\t\"path\"\n);\n",
-    // );
+    );
-    // test(
+    test(
-    // "new Worker(\n    /* multi\n     * line\n     * webpackBar: */ 'path');",
+        "new Worker(\n    /* multi\n     * line\n     * webpackBar: */ 'path');",
-    // "new Worker(\n  /* multi\n   * line\n   * webpackBar: */\n  \"path\"\n);\n",
+        "new Worker(\n\t/* multi\n\t* line\n\t* webpackBar: */\n\t\"path\"\n);\n",
-    // );
+    );
-    // test(
+    test(
-    // "new Worker(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */);",
+        "new Worker(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */);",
-    // "new Worker(\n  /* webpackFoo: 1 */\n  \"path\"\n  /* webpackBar:2 */\n);\n",
+        "new Worker(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
-    // );
+    );
-    // test(
+    test(
-    // "new Worker(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */ ,);",
+        "new Worker(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */ ,);",
-    // "new Worker(\n  /* webpackFoo: 1 */\n  \"path\"\n);\n",
+        "new Worker(\n\t/* webpackFoo: 1 */\n\t\"path\"\n);\n",
-    // ); // Not currently handled
+    ); // Not currently handled
-    // test(
+    test(
-    // "new Worker(/* webpackFoo: 1 */ 'path', /* webpackBar:2 */ );",
+        "new Worker(/* webpackFoo: 1 */ 'path', /* webpackBar:2 */ );",
-    // "new Worker(\n  /* webpackFoo: 1 */\n  \"path\"\n  /* webpackBar:2 */\n);\n",
+        "new Worker(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
-    // );
+    );
-    // test( "new Worker(new URL('path', /* webpackFoo: these can go anywhere */ import.meta.url))",
+    test( "new Worker(new URL('path', /* webpackFoo: these can go anywhere */ import.meta.url))",
-    // "new Worker(new URL(\n  \"path\",\n  /* webpackFoo: these can go anywhere */\n  import.meta.url\n));\n");
+    "new Worker(new URL(\n\t\"path\",\n\t/* webpackFoo: these can go anywhere */\n\timport.meta.url\n));\n");
+
+    // non-webpack comments
+    test("new Worker(/* before */ foo)", "new Worker(\n\t/* before */\n\tfoo\n);\n");
+    test("new Worker(/* before */ 'foo')", "new Worker(\n\t/* before */\n\t\"foo\"\n);\n");
+    test("new Worker(foo /* after */)", "new Worker(\n\tfoo\n\t/* after */\n);\n");
+    test("new Worker('foo' /* after */)", "new Worker(\n\t\"foo\"\n\t/* after */\n);\n");
 }
 
 #[test]
@@ -234,6 +241,43 @@ fn test_call() {
     test_minify("(1, eval)?.(x)", "(1,eval)?.(x);");
     // testMangleMinify(t, "(1 ? eval : 2)(x)", "(0,eval)(x);");
     // testMangleMinify(t, "(1 ? eval : 2)?.(x)", "eval?.(x);");
+
+    // Webpack-specific comments
+    // TODO: Not support trailing comments yet
+    // test(
+    //     "import(// webpackFoo: 1\n // webpackBar: 2\n 'path');",
+    //     "import(\n  // webpackFoo: 1\n  // webpackBar: 2\n  \"path\"\n);\n",
+    // );
+    // test( "import(// webpackFoo: 1\n // webpackBar: 2\n 'path', {type: 'module'});", "import(\n  // webpackFoo: 1\n  // webpackBar: 2\n  \"path\",\n  { type: \"module\" }\n);\n");
+    test(
+        "require(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path');",
+        "require(\n\t/* webpackFoo: 1 */\n\t/* webpackBar: 2 */\n\t\"path\"\n);\n",
+    );
+    test( "require(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path', {type: 'module'});",
+        "require(\n\t/* webpackFoo: 1 */\n\t/* webpackBar: 2 */\n\t\"path\",\n\t{ type: \"module\" }\n);\n");
+    test(
+        "require(\n    /* multi\n     * line\n     * webpackBar: */ 'path');",
+        "require(\n\t/* multi\n\t* line\n\t* webpackBar: */\n\t\"path\"\n);\n",
+    );
+    test(
+        "require(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */);",
+        "require(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
+    );
+    test(
+        "require(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */ ,);",
+        "require(\n\t/* webpackFoo: 1 */\n\t\"path\"\n);\n",
+    ); // Not currently handled
+    test(
+        "require(/* webpackFoo: 1 */ 'path', /* webpackBar:2 */ );",
+        "require(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
+    );
+    test( "require(/* webpackFoo: 1 */ 'path', { type: 'module' } /* webpackBar:2 */ );", "require(\n\t/* webpackFoo: 1 */\n\t\"path\",\n\t{ type: \"module\" }\n\t/* webpackBar:2 */\n);\n");
+
+    // non-webpack comments
+    test("require(/* before */ foo)", "require(\n\t/* before */\n\tfoo\n);\n");
+    test("require(/* before */ 'foo')", "require(\n\t/* before */\n\t\"foo\"\n);\n");
+    test("require(foo /* after */)", "require(\n\tfoo\n\t/* after */\n);\n");
+    test("require('foo' /* after */)", "require(\n\t\"foo\"\n\t/* after */\n);\n");
 }
 
 #[test]
@@ -613,37 +657,43 @@ fn test_decorators() {
 fn test_import() {
     test("import('path');", "import(\"path\");\n"); // The semicolon must not be a separate statement
 
-    // FIXME
+    // TODO: Not support trailing comments yet
-    // Test preservation of Webpack-specific comments
     // test(
     //     "import(// webpackFoo: 1\n // webpackBar: 2\n 'path');",
     //     "import(\n  // webpackFoo: 1\n  // webpackBar: 2\n  \"path\"\n);\n",
     // );
     // test( "import(// webpackFoo: 1\n // webpackBar: 2\n 'path', {type: 'module'});", "import(\n  // webpackFoo: 1\n  // webpackBar: 2\n  \"path\",\n  { type: \"module\" }\n);\n");
-    // test(
+    test(
-    // "import(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path');",
+        "import(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path');",
-    // "import(\n  /* webpackFoo: 1 */\n  /* webpackBar: 2 */\n  \"path\"\n);\n",
+        "import(\n\t/* webpackFoo: 1 */\n\t/* webpackBar: 2 */\n\t\"path\"\n);\n",
-    // );
+    );
-    // test( "import(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path', {type: 'module'});", "import(\n  /* webpackFoo: 1 */\n  /* webpackBar: 2 */\n  \"path\",\n  { type: \"module\" }\n);\n");
+    test( "import(/* webpackFoo: 1 */ /* webpackBar: 2 */ 'path', {type: 'module'});",
-    // test(
+        "import(\n\t/* webpackFoo: 1 */\n\t/* webpackBar: 2 */\n\t\"path\",\n\t{ type: \"module\" }\n);\n");
-    // "import(\n    /* multi\n     * line\n     * webpackBar: */ 'path');",
+    test(
-    // "import(\n  /* multi\n   * line\n   * webpackBar: */\n  \"path\"\n);\n",
+        "import(\n    /* multi\n     * line\n     * webpackBar: */ 'path');",
-    // );
+        "import(\n\t/* multi\n\t* line\n\t* webpackBar: */\n\t\"path\"\n);\n",
-    // test(
+    );
-    // "import(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */);",
+    test(
-    // "import(\n  /* webpackFoo: 1 */\n  \"path\"\n  /* webpackBar:2 */\n);\n",
+        "import(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */);",
-    // );
+        "import(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
-    // test(
+    );
-    // "import(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */ ,);",
+    test(
-    // "import(\n  /* webpackFoo: 1 */\n  \"path\"\n);\n",
+        "import(/* webpackFoo: 1 */ 'path' /* webpackBar:2 */ ,);",
-    // ); // Not currently handled
+        "import(\n\t/* webpackFoo: 1 */\n\t\"path\"\n);\n",
-    // test(
+    ); // Not currently handled
-    // "import(/* webpackFoo: 1 */ 'path', /* webpackBar:2 */ );",
+    test(
-    // "import(\n  /* webpackFoo: 1 */\n  \"path\"\n  /* webpackBar:2 */\n);\n",
+        "import(/* webpackFoo: 1 */ 'path', /* webpackBar:2 */ );",
-    // );
+        "import(\n\t/* webpackFoo: 1 */\n\t\"path\"\n\t/* webpackBar:2 */\n);\n",
-    // test( "import(/* webpackFoo: 1 */ 'path', { type: 'module' } /* webpackBar:2 */ );", "import(\n  /* webpackFoo: 1 */\n  \"path\",\n  { type: \"module\" }\n  /* webpackBar:2 */\n);\n");
+    );
-    // test( "import(new URL('path', /* webpackFoo: these can go anywhere */ import.meta.url))",
+    test( "import(/* webpackFoo: 1 */ 'path', { type: 'module' } /* webpackBar:2 */ );", "import(\n\t/* webpackFoo: 1 */\n\t\"path\",\n\t{ type: \"module\" }\n\t/* webpackBar:2 */\n);\n");
-    // "import(new URL(\n  \"path\",\n  /* webpackFoo: these can go anywhere */\n  import.meta.url\n));\n");
+    test( "import(new URL('path', /* webpackFoo: these can go anywhere */ import.meta.url))",
+    "import(new URL(\n\t\"path\",\n\t/* webpackFoo: these can go anywhere */\n\timport.meta.url\n));\n");
+
+    // non-webpack comments
+    test("import(/* before */ foo)", "import(\n\t/* before */\n\tfoo\n);\n");
+    test("import(/* before */ 'foo')", "import(\n\t/* before */\n\t\"foo\"\n);\n");
+    test("import(foo /* after */)", "import(\n\tfoo\n\t/* after */\n);\n");
+    test("import('foo' /* after */)", "import(\n\t\"foo\"\n\t/* after */\n);\n");
 }
 
 #[test]

crates/oxc_codegen/tests/integration/snapshots/pure_comments.snap

@@ -216,7 +216,9 @@ const builtInSymbols = new Set(
 )
         
 ----------
-const builtInSymbols = new Set(/*#__PURE__*/ Object.getOwnPropertyNames(Symbol).filter((key) => key !== 'arguments' && key !== 'caller'));
+const builtInSymbols = new Set(
+	/*#__PURE__*/ Object.getOwnPropertyNames(Symbol).filter((key) => key !== 'arguments' && key !== 'caller')
+);
 
 ########## 14
 (/* @__PURE__ */ new Foo()).bar();

crates/oxc_codegen/tests/integration/unit.rs

@@ -255,3 +255,19 @@ fn equality() {
     test_minify("a, b == c , d", "a,b==c,d;");
     test_minify("(a, b) == (c , d)", "(a,b)==(c,d);");
 }
+
+#[test]
+fn vite_special_comments() {
+    test(
+        "new URL(/* @vite-ignore */ 'non-existent', import.meta.url)",
+        "new URL(\n\t/* @vite-ignore */\n\t\"non-existent\",\n\timport.meta.url\n);\n",
+    );
+    test(
+        "const importPromise = import(\n/* @vite-ignore */\nbase + '.js'\n);",
+        "const importPromise = import(\n\t/* @vite-ignore */\n\tbase + \".js\"\n);\n",
+    );
+    test(
+        "import(/* @vite-ignore */ module1Url).then((module1) => {\nself.postMessage(module.default + module1.msg1 + import.meta.env.BASE_URL)})",
+        "import(\n\t/* @vite-ignore */\n\tmodule1Url\n).then((module1) => {\n\tself.postMessage(module.default + module1.msg1 + import.meta.env.BASE_URL);\n});\n",
+    );
+}