src/core/document.js

@@ -1117,26 +1117,24 @@ class PDFDocument {
   }
 
   get _xfaStreams() {
-    const { acroForm } = this.catalog;
+    const acroForm = this.catalog.acroForm;
     if (!acroForm) {
       return null;
     }
 
     const xfa = acroForm.get("XFA");
-    const entries = new Map(
-      [
-        "xdp:xdp",
-        "template",
-        "datasets",
-        "config",
-        "connectionSet",
-        "localeSet",
-        "stylesheet",
-        "/xdp:xdp",
-      ].map(e => [e, null])
-    );
+    const entries = {
+      "xdp:xdp": "",
+      template: "",
+      datasets: "",
+      config: "",
+      connectionSet: "",
+      localeSet: "",
+      stylesheet: "",
+      "/xdp:xdp": "",
+    };
     if (xfa instanceof BaseStream && !xfa.isEmpty) {
-      entries.set("xdp:xdp", xfa);
+      entries["xdp:xdp"] = xfa;
       return entries;
     }
 
@@ -1154,14 +1152,14 @@ class PDFDocument {
         name = xfa[i];
       }
 
-      if (!entries.has(name)) {
+      if (!entries.hasOwnProperty(name)) {
         continue;
       }
       const data = this.xref.fetchIfRef(xfa[i + 1]);
       if (!(data instanceof BaseStream) || data.isEmpty) {
         continue;
       }
-      entries.set(name, data);
+      entries[name] = data;
     }
     return entries;
   }
@@ -1172,7 +1170,7 @@ class PDFDocument {
       return shadow(this, "xfaDatasets", null);
     }
     for (const key of ["datasets", "xdp:xdp"]) {
-      const stream = streams.get(key);
+      const stream = streams[key];
       if (!stream) {
         continue;
       }
@@ -1194,7 +1192,7 @@ class PDFDocument {
       return null;
     }
     const data = Object.create(null);
-    for (const [key, stream] of streams) {
+    for (const [key, stream] of Object.entries(streams)) {
       if (!stream) {
         continue;
       }

test/integration/test_utils.mjs

@@ -466,8 +466,8 @@ async function getFirstSerialized(page, filter = undefined) {
 function getAnnotationStorage(page) {
   return page.evaluate(() =>
     Object.fromEntries(
-      window.PDFViewerApplication.pdfDocument.annotationStorage.serializable
-        .map || []
+      window.PDFViewerApplication.pdfDocument.annotationStorage.serializable.map?.entries() ||
+        []
     )
   );
 }

web/generic_signature_storage.js

@@ -36,7 +36,7 @@ class SignatureStorage {
   #save() {
     localStorage.setItem(
       KEY_STORAGE,
-      JSON.stringify(Object.fromEntries(this.#signatures))
+      JSON.stringify(Object.fromEntries(this.#signatures.entries()))
     );
   }