From 50c2e0e8c77e69c3e70c3a7eb08c4e6d00a1b869 Mon Sep 17 00:00:00 2001
From: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
Date: Sun, 1 Mar 2026 15:53:05 -0300
Subject: [PATCH 1/2] fix(asyncReader): handle CJS/ESM interop and null
 GlobalWorkerOptions

In Vite watch mode, pdfjs-dist is served without pre-bundling when the
package is linked via file: path, causing the module to be wrapped under
.default instead of exposing named exports directly. This results in
PDFWorker being undefined at runtime.

- Add normalizePdfjs() to unwrap .default when present (CJS/ESM interop)
- Guard ensureWorkerSrc against undefined GlobalWorkerOptions
- Reset sharedWorker to null in setWorkerPath to force recreation
- Add .catch with console.warn in setWorkerPath for failed async updates

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
---
 src/utils/asyncReader.ts | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/utils/asyncReader.ts b/src/utils/asyncReader.ts
index 7da94db..a8770f4 100644
--- a/src/utils/asyncReader.ts
+++ b/src/utils/asyncReader.ts
@@ -8,9 +8,16 @@ let pdfjsPromise: Promise<typeof import('pdfjs-dist')> | null = null
 let workerUrlPromise: Promise<string> | null = null
 let workerSrcOverride: string | null = null
 
+type PdfjsModule = typeof import('pdfjs-dist')
+
+function normalizePdfjs(mod: PdfjsModule): PdfjsModule {
+  const m = mod as PdfjsModule & { default?: PdfjsModule }
+  return (m.default?.PDFWorker ? m.default : m) as PdfjsModule
+}
+
 function loadPdfjs() {
   if (!pdfjsPromise) {
-    pdfjsPromise = import('pdfjs-dist')
+    pdfjsPromise = import('pdfjs-dist').then(normalizePdfjs)
   }
   return pdfjsPromise
 }
@@ -24,7 +31,10 @@ function loadWorkerUrl() {
   return workerUrlPromise
 }
 
-async function ensureWorkerSrc(pdfjs: typeof import('pdfjs-dist')) {
+async function ensureWorkerSrc(pdfjs: PdfjsModule) {
+  if (!pdfjs?.GlobalWorkerOptions) {
+    return
+  }
   if (workerSrcOverride) {
     pdfjs.GlobalWorkerOptions.workerSrc = workerSrcOverride
     return
@@ -34,7 +44,7 @@ async function ensureWorkerSrc(pdfjs: typeof import('pdfjs-dist')) {
   }
 }
 
-async function getSharedWorker(pdfjs: typeof import('pdfjs-dist')): Promise<PDFWorker> {
+async function getSharedWorker(pdfjs: PdfjsModule): Promise<PDFWorker> {
   if (!sharedWorker) {
     await ensureWorkerSrc(pdfjs)
     sharedWorker = new pdfjs.PDFWorker({}) as PDFWorker
@@ -44,9 +54,14 @@ async function getSharedWorker(pdfjs: typeof import('pdfjs-dist')): Promise<PDFW
 
 export function setWorkerPath(path: string) {
   workerSrcOverride = path
+  sharedWorker = null
   if (pdfjsPromise) {
     pdfjsPromise.then((pdfjs) => {
-      pdfjs.GlobalWorkerOptions.workerSrc = path
+      if (pdfjs?.GlobalWorkerOptions) {
+        pdfjs.GlobalWorkerOptions.workerSrc = path
+      }
+    }).catch((error) => {
+      console.warn('setWorkerPath: failed to update pdfjs workerSrc immediately', error)
     })
   }
 }

From aa39f8366650e632f2e38921dabde5d417c62b9f Mon Sep 17 00:00:00 2001
From: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
Date: Sun, 1 Mar 2026 15:54:23 -0300
Subject: [PATCH 2/2] chore: bump version

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>
---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index fc9e7ce..de85f3d 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@libresign/pdf-elements",
   "description": "PDF viewer with draggable and resizable element overlays for Vue 3",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "author": "LibreCode <contact@librecode.coop>",
   "private": false,
   "main": "dist/index.js",