From e0a84c3a759336aa8b384e226eaa3ed78db0e697 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=87=8E=E9=B8=A1=E6=B2=A1=E5=90=8D?=
 <asd308487730@gmail.com>
Date: Sun, 30 Jun 2024 20:35:34 +0800
Subject: [PATCH 1/3] chore: comments

---
 src/index.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/index.ts b/src/index.ts
index b9f9c0a..adb231f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -86,8 +86,9 @@ export default function native(options: PrebundleOptions): Plugin {
       }
     },
     async config(config) {
+      // Not necessary, since bundle.js is wrapped in an immediately executed closure.
       modifyCommonjs(config, options.modules)
-      // Run build are not necessary.
+      // Not necessary, since Pre-Bundling is disabled by default in `vite build` command.
       modifyOptimizeDeps(config, options.modules)
     },
   }

From 5bd47c7f5a32174b1f3e53b0a31bfb32364f8cc7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=87=8E=E9=B8=A1=E6=B2=A1=E5=90=8D?=
 <asd308487730@gmail.com>
Date: Sun, 30 Jun 2024 20:36:04 +0800
Subject: [PATCH 2/3] feat: improve sourcemap

---
 src/utils.ts | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/utils.ts b/src/utils.ts
index 5df84e8..a1c7760 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -28,12 +28,28 @@ export function cjs2esm(id: string, code: string) {
   const snippet = libEsm({
     exports: Object.getOwnPropertyNames(cjs.require(id)),
   })
+  const commentsStart = '/* [webpack-prebundle]: start */'
+  const commentsEnd = '/* [webpack-prebundle]: end */'
+  const sourcemapURL = '//# sourceMappingURL='
+  const esmStart = [commentsStart, 'const module = { exports: {} };', commentsEnd].join('')
+  const esmEnd = [
+    commentsStart,
+    'const _M_ = module.exports;',
+    snippet.exports,
+    commentsEnd,
+  ].join('\n')
+
+  code = esmStart + code
+  const lines = code.split('\n')
+  let lastLine = lines[lines.length - 1]
+
+  if (lastLine.startsWith(sourcemapURL)) {
+    lines[lines.length - 1] = `${esmEnd}\n${lastLine}`
+    code = lines.join('\n')
+  } else {
+    code = `${code}\n${esmEnd}`
+  }
 
   // TODO: generate sourcemap for esm wrap-snippet
-  return `
-const module = { exports: {} };
-${code}
-const _M_ = module.exports;
-${snippet.exports}
-`
+  return code
 }

From 429e31fd0eec79ea01732e990d55d92d168acd91 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=87=8E=E9=B8=A1=E6=B2=A1=E5=90=8D?=
 <asd308487730@gmail.com>
Date: Mon, 1 Jul 2024 10:14:17 +0800
Subject: [PATCH 3/3] fix: add `exports` variable

---
 src/utils.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utils.ts b/src/utils.ts
index a1c7760..ca014cf 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -31,7 +31,7 @@ export function cjs2esm(id: string, code: string) {
   const commentsStart = '/* [webpack-prebundle]: start */'
   const commentsEnd = '/* [webpack-prebundle]: end */'
   const sourcemapURL = '//# sourceMappingURL='
-  const esmStart = [commentsStart, 'const module = { exports: {} };', commentsEnd].join('')
+  const esmStart = [commentsStart, 'const module = { exports: {} }; const exports = module.exports;', commentsEnd].join('')
   const esmEnd = [
     commentsStart,
     'const _M_ = module.exports;',