From 06e4580f8ba83e84f8a39c5a9e18c17ec5f60abf Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sun, 16 Feb 2025 13:55:35 +0100
Subject: [PATCH] Ensure that the `useWorkerFetch` fallback value is always a
 boolean

If either of the factory-urls are missing or invalid, the fallback value would currently become `useWorkerFetch === null`.
While that is obviously a falsy value, which means that the code still works as intended, we should ensure that this is consistent.
---
 src/display/api.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/display/api.js b/src/display/api.js
index 38ab1bfe7..944a9b772 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -331,7 +331,8 @@ function getDocument(src = {}) {
     typeof src.useWorkerFetch === "boolean"
       ? src.useWorkerFetch
       : (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")) ||
-        (CMapReaderFactory === DOMCMapReaderFactory &&
+        !!(
+          CMapReaderFactory === DOMCMapReaderFactory &&
           StandardFontDataFactory === DOMStandardFontDataFactory &&
           WasmFactory === DOMWasmFactory &&
           cMapUrl &&
@@ -339,7 +340,8 @@ function getDocument(src = {}) {
           wasmUrl &&
           isValidFetchUrl(cMapUrl, document.baseURI) &&
           isValidFetchUrl(standardFontDataUrl, document.baseURI) &&
-          isValidFetchUrl(wasmUrl, document.baseURI));
+          isValidFetchUrl(wasmUrl, document.baseURI)
+        );
 
   // Parameters only intended for development/testing purposes.
   const styleElement =