From 18b32b9224fa4f5349b1ab4680567d821f6ae089 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 13 Jun 2026 00:21:21 +0000
Subject: [PATCH 1/4] Initial plan


From f70af9cd20ca1044c4c646a68efc492cd490643d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 13 Jun 2026 00:26:05 +0000
Subject: [PATCH 2/4] Normalize nullish AcroForm text values

---
 lib/mixins/acroform.js      |  8 ++++++--
 tests/unit/acroform.spec.js | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/mixins/acroform.js b/lib/mixins/acroform.js
index e3dd0bb0f..814559541 100644
--- a/lib/mixins/acroform.js
+++ b/lib/mixins/acroform.js
@@ -368,8 +368,12 @@ export default {
     }
 
     Object.keys(VALUE_MAP).forEach((key) => {
-      if (options[key] !== undefined) {
-        options[VALUE_MAP[key]] = options[key];
+      if (key in options) {
+        if (options[key] == null) {
+          options[VALUE_MAP[key]] = new String('');
+        } else {
+          options[VALUE_MAP[key]] = options[key];
+        }
         delete options[key];
       }
     });
diff --git a/tests/unit/acroform.spec.js b/tests/unit/acroform.spec.js
index e6cde61e2..d7fc9db63 100644
--- a/tests/unit/acroform.spec.js
+++ b/tests/unit/acroform.spec.js
@@ -186,6 +186,24 @@ describe('acroform', () => {
       expect(docData.length).toBe(3);
       expect(docData).toContainChunk(expected);
     });
+
+    test.each([
+      ['undefined', undefined],
+      ['null', null],
+    ])('nullish %s value uses an empty string', (_label, value) => {
+      const expectedDoc = new PDFDocument({
+        info: { CreationDate: new Date(Date.UTC(2018, 1, 1)) },
+      });
+      expectedDoc.initForm();
+      const expectedDocData = logData(expectedDoc);
+      expectedDoc.formText('empty', 20, 20, 50, 20, { value: '' });
+
+      doc.initForm();
+      const docData = logData(doc);
+      doc.formText('empty', 20, 20, 50, 20, { value });
+
+      expect(docData).toContainChunk(expectedDocData);
+    });
   });
 
   test('flags', () => {

From 407ec0a73c43308938f655c9750fca9fc4df71c4 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 13 Jun 2026 00:28:00 +0000
Subject: [PATCH 3/4] Address AcroForm review feedback

---
 lib/mixins/acroform.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mixins/acroform.js b/lib/mixins/acroform.js
index 814559541..555f776b1 100644
--- a/lib/mixins/acroform.js
+++ b/lib/mixins/acroform.js
@@ -370,7 +370,7 @@ export default {
     Object.keys(VALUE_MAP).forEach((key) => {
       if (key in options) {
         if (options[key] == null) {
-          options[VALUE_MAP[key]] = new String('');
+          options[VALUE_MAP[key]] = '';
         } else {
           options[VALUE_MAP[key]] = options[key];
         }

From 0c92a0e2424e598cfda13c84f96b52ac1f9bc96d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 13 Jun 2026 00:35:05 +0000
Subject: [PATCH 4/4] Simplify AcroForm value normalization

---
 lib/mixins/acroform.js | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/mixins/acroform.js b/lib/mixins/acroform.js
index 555f776b1..4933acb8f 100644
--- a/lib/mixins/acroform.js
+++ b/lib/mixins/acroform.js
@@ -369,11 +369,7 @@ export default {
 
     Object.keys(VALUE_MAP).forEach((key) => {
       if (key in options) {
-        if (options[key] == null) {
-          options[VALUE_MAP[key]] = '';
-        } else {
-          options[VALUE_MAP[key]] = options[key];
-        }
+        options[VALUE_MAP[key]] = options[key] ?? '';
         delete options[key];
       }
     });