From d5f043d127cac1e8ec8a6eacde04ad1133600a16 Mon Sep 17 00:00:00 2001
From: ChillingPepper <90042155+ChillingPepper@users.noreply.github.com>
Date: Fri, 30 Dec 2022 07:38:38 +0100
Subject: [PATCH] [utils] js_to_json: Fix bug in f55523c (#5771)

Authored by: ChillingPepper, pukkandan
---
 test/test_utils.py | 79 ++++++++++++++++++++++++++++++++++++++++++++++
 yt_dlp/utils.py    |  8 ++++-
 2 files changed, 86 insertions(+), 1 deletion(-)

diff --git a/test/test_utils.py b/test/test_utils.py
index 49ab3796b..82ae77ea2 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -954,6 +954,85 @@ def test_escape_url(self):
         )
         self.assertEqual(escape_url('http://vimeo.com/56015672#at=0'), 'http://vimeo.com/56015672#at=0')
 
+    def test_js_to_json_vars_strings(self):
+        self.assertDictEqual(
+            json.loads(js_to_json(
+                '''{
+                    'null': a,
+                    'nullStr': b,
+                    'true': c,
+                    'trueStr': d,
+                    'false': e,
+                    'falseStr': f,
+                    'unresolvedVar': g,
+                }''',
+                {
+                    'a': 'null',
+                    'b': '"null"',
+                    'c': 'true',
+                    'd': '"true"',
+                    'e': 'false',
+                    'f': '"false"',
+                    'g': 'var',
+                }
+            )),
+            {
+                'null': None,
+                'nullStr': 'null',
+                'true': True,
+                'trueStr': 'true',
+                'false': False,
+                'falseStr': 'false',
+                'unresolvedVar': 'var'
+            }
+        )
+
+        self.assertDictEqual(
+            json.loads(js_to_json(
+                '''{
+                    'int': a,
+                    'intStr': b,
+                    'float': c,
+                    'floatStr': d,
+                }''',
+                {
+                    'a': '123',
+                    'b': '"123"',
+                    'c': '1.23',
+                    'd': '"1.23"',
+                }
+            )),
+            {
+                'int': 123,
+                'intStr': '123',
+                'float': 1.23,
+                'floatStr': '1.23',
+            }
+        )
+
+        self.assertDictEqual(
+            json.loads(js_to_json(
+                '''{
+                    'object': a,
+                    'objectStr': b,
+                    'array': c,
+                    'arrayStr': d,
+                }''',
+                {
+                    'a': '{}',
+                    'b': '"{}"',
+                    'c': '[]',
+                    'd': '"[]"',
+                }
+            )),
+            {
+                'object': {},
+                'objectStr': '{}',
+                'array': [],
+                'arrayStr': '[]',
+            }
+        )
+
     def test_js_to_json_realworld(self):
         inp = '''{
             'clip':{'provider':'pseudo'}
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index 43b5fda1d..64c83a77a 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -3360,7 +3360,13 @@ def fix_kv(m):
                 return f'"{i}":' if v.endswith(':') else str(i)
 
         if v in vars:
-            return json.dumps(vars[v])
+            try:
+                if not strict:
+                    json.loads(vars[v])
+            except json.decoder.JSONDecodeError:
+                return json.dumps(vars[v])
+            else:
+                return vars[v]
 
         if not strict:
             return f'"{v}"'