diff --git a/fpdfsdk/javascript/Document.cpp b/fpdfsdk/javascript/Document.cpp
index 79d68ec..4bf1afd 100644
--- a/fpdfsdk/javascript/Document.cpp
+++ b/fpdfsdk/javascript/Document.cpp
@@ -801,15 +801,18 @@
   CJS_Runtime* pRuntime = pContext->GetJSRuntime();
 
   v8::Local<v8::Object> pObj = pRuntime->NewFxDynamicObj(-1);
-  pRuntime->PutObjectString(pObj, L"Author", cwAuthor);
-  pRuntime->PutObjectString(pObj, L"Title", cwTitle);
-  pRuntime->PutObjectString(pObj, L"Subject", cwSubject);
-  pRuntime->PutObjectString(pObj, L"Keywords", cwKeywords);
-  pRuntime->PutObjectString(pObj, L"Creator", cwCreator);
-  pRuntime->PutObjectString(pObj, L"Producer", cwProducer);
-  pRuntime->PutObjectString(pObj, L"CreationDate", cwCreationDate);
-  pRuntime->PutObjectString(pObj, L"ModDate", cwModDate);
-  pRuntime->PutObjectString(pObj, L"Trapped", cwTrapped);
+  pRuntime->PutObjectProperty(pObj, L"Author", pRuntime->NewString(cwAuthor));
+  pRuntime->PutObjectProperty(pObj, L"Title", pRuntime->NewString(cwTitle));
+  pRuntime->PutObjectProperty(pObj, L"Subject", pRuntime->NewString(cwSubject));
+  pRuntime->PutObjectProperty(pObj, L"Keywords",
+                              pRuntime->NewString(cwKeywords));
+  pRuntime->PutObjectProperty(pObj, L"Creator", pRuntime->NewString(cwCreator));
+  pRuntime->PutObjectProperty(pObj, L"Producer",
+                              pRuntime->NewString(cwProducer));
+  pRuntime->PutObjectProperty(pObj, L"CreationDate",
+                              pRuntime->NewString(cwCreationDate));
+  pRuntime->PutObjectProperty(pObj, L"ModDate", pRuntime->NewString(cwModDate));
+  pRuntime->PutObjectProperty(pObj, L"Trapped", pRuntime->NewString(cwTrapped));
 
   // It's to be compatible to non-standard info dictionary.
   for (const auto& it : *pDictionary) {
@@ -817,11 +820,14 @@
     CPDF_Object* pValueObj = it.second.get();
     CFX_WideString wsKey = CFX_WideString::FromUTF8(bsKey.AsStringC());
     if (pValueObj->IsString() || pValueObj->IsName()) {
-      pRuntime->PutObjectString(pObj, wsKey, pValueObj->GetUnicodeText());
+      pRuntime->PutObjectProperty(
+          pObj, wsKey, pRuntime->NewString(pValueObj->GetUnicodeText()));
     } else if (pValueObj->IsNumber()) {
-      pRuntime->PutObjectNumber(pObj, wsKey, (float)pValueObj->GetNumber());
+      pRuntime->PutObjectProperty(pObj, wsKey,
+                                  pRuntime->NewNumber(pValueObj->GetNumber()));
     } else if (pValueObj->IsBoolean()) {
-      pRuntime->PutObjectBoolean(pObj, wsKey, !!pValueObj->GetInteger());
+      pRuntime->PutObjectProperty(
+          pObj, wsKey, pRuntime->NewBoolean(!!pValueObj->GetInteger()));
     }
   }
   vp << pObj;
diff --git a/fpdfsdk/javascript/JS_Value.cpp b/fpdfsdk/javascript/JS_Value.cpp
index c99affb..7900914 100644
--- a/fpdfsdk/javascript/JS_Value.cpp
+++ b/fpdfsdk/javascript/JS_Value.cpp
@@ -88,7 +88,7 @@
 }
 
 double CJS_Value::ToDouble(CJS_Runtime* pRuntime) const {
-  return pRuntime->ToNumber(m_pValue);
+  return pRuntime->ToDouble(m_pValue);
 }
 
 float CJS_Value::ToFloat(CJS_Runtime* pRuntime) const {
@@ -105,7 +105,7 @@
 }
 
 CFX_WideString CJS_Value::ToCFXWideString(CJS_Runtime* pRuntime) const {
-  return pRuntime->ToString(m_pValue);
+  return pRuntime->ToWideString(m_pValue);
 }
 
 CFX_ByteString CJS_Value::ToCFXByteString(CJS_Runtime* pRuntime) const {
@@ -117,9 +117,7 @@
 }
 
 v8::Local<v8::Array> CJS_Value::ToV8Array(CJS_Runtime* pRuntime) const {
-  if (IsArrayObject())
-    return v8::Local<v8::Array>::Cast(pRuntime->ToObject(m_pValue));
-  return v8::Local<v8::Array>();
+  return pRuntime->ToArray(m_pValue);
 }
 
 void CJS_Value::SetNull(CJS_Runtime* pRuntime) {
@@ -360,7 +358,7 @@
 CJS_Date::~CJS_Date() {}
 
 bool CJS_Date::IsValidDate(CJS_Runtime* pRuntime) const {
-  return !m_pDate.IsEmpty() && !JS_PortIsNan(pRuntime->ToNumber(m_pDate));
+  return !m_pDate.IsEmpty() && !JS_PortIsNan(pRuntime->ToDouble(m_pDate));
 }
 
 void CJS_Date::Attach(v8::Local<v8::Date> pDate) {
@@ -371,7 +369,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetYearFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetYearFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetYear(CJS_Runtime* pRuntime, int iYear) {
@@ -384,7 +382,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetMonthFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetMonthFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetMonth(CJS_Runtime* pRuntime, int iMonth) {
@@ -397,7 +395,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetDayFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetDayFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetDay(CJS_Runtime* pRuntime, int iDay) {
@@ -410,7 +408,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetHourFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetHourFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetHours(CJS_Runtime* pRuntime, int iHours) {
@@ -423,7 +421,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetMinFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetMinFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetMinutes(CJS_Runtime* pRuntime, int minutes) {
@@ -436,7 +434,7 @@
   if (!IsValidDate(pRuntime))
     return 0;
 
-  return JS_GetSecFromTime(JS_LocalTime(pRuntime->ToNumber(m_pDate)));
+  return JS_GetSecFromTime(JS_LocalTime(pRuntime->ToDouble(m_pDate)));
 }
 
 void CJS_Date::SetSeconds(CJS_Runtime* pRuntime, int seconds) {
@@ -446,11 +444,12 @@
 }
 
 double CJS_Date::ToDouble(CJS_Runtime* pRuntime) const {
-  return !m_pDate.IsEmpty() ? pRuntime->ToNumber(m_pDate) : 0.0;
+  return !m_pDate.IsEmpty() ? pRuntime->ToDouble(m_pDate) : 0.0;
 }
 
 CFX_WideString CJS_Date::ToString(CJS_Runtime* pRuntime) const {
-  return !m_pDate.IsEmpty() ? pRuntime->ToString(m_pDate) : CFX_WideString();
+  return !m_pDate.IsEmpty() ? pRuntime->ToWideString(m_pDate)
+                            : CFX_WideString();
 }
 
 v8::Local<v8::Date> CJS_Date::ToV8Date(CJS_Runtime* pRuntime) const {
diff --git a/fpdfsdk/javascript/global.cpp b/fpdfsdk/javascript/global.cpp
index c2d3586..aca8697 100644
--- a/fpdfsdk/javascript/global.cpp
+++ b/fpdfsdk/javascript/global.cpp
@@ -192,41 +192,41 @@
         SetGlobalVariables(pData->data.sKey, JS_GlobalDataType::NUMBER,
                            pData->data.dData, false, "",
                            v8::Local<v8::Object>(), pData->bPersistent == 1);
-        pRuntime->PutObjectNumber(m_pJSObject->ToV8Object(),
-                                  pData->data.sKey.UTF8Decode(),
-                                  pData->data.dData);
+        pRuntime->PutObjectProperty(m_pJSObject->ToV8Object(),
+                                    pData->data.sKey.UTF8Decode(),
+                                    pRuntime->NewNumber(pData->data.dData));
         break;
       case JS_GlobalDataType::BOOLEAN:
         SetGlobalVariables(pData->data.sKey, JS_GlobalDataType::BOOLEAN, 0,
-                           (bool)(pData->data.bData == 1), "",
-                           v8::Local<v8::Object>(), pData->bPersistent == 1);
-        pRuntime->PutObjectBoolean(m_pJSObject->ToV8Object(),
-                                   pData->data.sKey.UTF8Decode(),
-                                   (bool)(pData->data.bData == 1));
+                           pData->data.bData == 1, "", v8::Local<v8::Object>(),
+                           pData->bPersistent == 1);
+        pRuntime->PutObjectProperty(
+            m_pJSObject->ToV8Object(), pData->data.sKey.UTF8Decode(),
+            pRuntime->NewBoolean(pData->data.bData == 1));
         break;
       case JS_GlobalDataType::STRING:
         SetGlobalVariables(pData->data.sKey, JS_GlobalDataType::STRING, 0,
                            false, pData->data.sData, v8::Local<v8::Object>(),
                            pData->bPersistent == 1);
-        pRuntime->PutObjectString(m_pJSObject->ToV8Object(),
-                                  pData->data.sKey.UTF8Decode(),
-                                  pData->data.sData.UTF8Decode());
+        pRuntime->PutObjectProperty(
+            m_pJSObject->ToV8Object(), pData->data.sKey.UTF8Decode(),
+            pRuntime->NewString(pData->data.sData.UTF8Decode()));
         break;
       case JS_GlobalDataType::OBJECT: {
         v8::Local<v8::Object> pObj = pRuntime->NewFxDynamicObj(-1);
-
         PutObjectProperty(pObj, &pData->data);
         SetGlobalVariables(pData->data.sKey, JS_GlobalDataType::OBJECT, 0,
                            false, "", pObj, pData->bPersistent == 1);
-        pRuntime->PutObjectObject(m_pJSObject->ToV8Object(),
-                                  pData->data.sKey.UTF8Decode(), pObj);
+        pRuntime->PutObjectProperty(m_pJSObject->ToV8Object(),
+                                    pData->data.sKey.UTF8Decode(), pObj);
       } break;
       case JS_GlobalDataType::NULLOBJ:
         SetGlobalVariables(pData->data.sKey, JS_GlobalDataType::NULLOBJ, 0,
                            false, "", v8::Local<v8::Object>(),
                            pData->bPersistent == 1);
-        pRuntime->PutObjectNull(m_pJSObject->ToV8Object(),
-                                pData->data.sKey.UTF8Decode());
+        pRuntime->PutObjectProperty(m_pJSObject->ToV8Object(),
+                                    pData->data.sKey.UTF8Decode(),
+                                    pRuntime->NewNull());
         break;
     }
   }
@@ -282,7 +282,7 @@
         CJS_KeyValue* pObjElement = new CJS_KeyValue;
         pObjElement->nType = JS_GlobalDataType::NUMBER;
         pObjElement->sKey = sKey;
-        pObjElement->dData = pRuntime->ToNumber(v);
+        pObjElement->dData = pRuntime->ToDouble(v);
         array.Add(pObjElement);
       } break;
       case CJS_Value::VT_boolean: {
@@ -329,24 +329,26 @@
     CJS_KeyValue* pObjData = pData->objData.GetAt(i);
     switch (pObjData->nType) {
       case JS_GlobalDataType::NUMBER:
-        pRuntime->PutObjectNumber(pObj, pObjData->sKey.UTF8Decode(),
-                                  pObjData->dData);
+        pRuntime->PutObjectProperty(pObj, pObjData->sKey.UTF8Decode(),
+                                    pRuntime->NewNumber(pObjData->dData));
         break;
       case JS_GlobalDataType::BOOLEAN:
-        pRuntime->PutObjectBoolean(pObj, pObjData->sKey.UTF8Decode(),
-                                   pObjData->bData == 1);
+        pRuntime->PutObjectProperty(pObj, pObjData->sKey.UTF8Decode(),
+                                    pRuntime->NewBoolean(pObjData->bData == 1));
         break;
       case JS_GlobalDataType::STRING:
-        pRuntime->PutObjectString(pObj, pObjData->sKey.UTF8Decode(),
-                                  pObjData->sData.UTF8Decode());
+        pRuntime->PutObjectProperty(
+            pObj, pObjData->sKey.UTF8Decode(),
+            pRuntime->NewString(pObjData->sData.UTF8Decode()));
         break;
       case JS_GlobalDataType::OBJECT: {
         v8::Local<v8::Object> pNewObj = pRuntime->NewFxDynamicObj(-1);
         PutObjectProperty(pNewObj, pObjData);
-        pRuntime->PutObjectObject(pObj, pObjData->sKey.UTF8Decode(), pNewObj);
+        pRuntime->PutObjectProperty(pObj, pObjData->sKey.UTF8Decode(), pNewObj);
       } break;
       case JS_GlobalDataType::NULLOBJ:
-        pRuntime->PutObjectNull(pObj, pObjData->sKey.UTF8Decode());
+        pRuntime->PutObjectProperty(pObj, pObjData->sKey.UTF8Decode(),
+                                    pRuntime->NewNull());
         break;
     }
   }
diff --git a/fxjs/fxjs_v8.cpp b/fxjs/fxjs_v8.cpp
index 5ce8c47..c96cc1f 100644
--- a/fxjs/fxjs_v8.cpp
+++ b/fxjs/fxjs_v8.cpp
@@ -596,79 +596,21 @@
 
   std::vector<CFX_WideString> result;
   for (uint32_t i = 0; i < val->Length(); ++i) {
-    result.push_back(ToString(val->Get(context, i).ToLocalChecked()));
+    result.push_back(ToWideString(val->Get(context, i).ToLocalChecked()));
   }
 
   return result;
 }
 
-void CFXJS_Engine::PutObjectString(v8::Local<v8::Object> pObj,
-                                   const CFX_WideString& wsPropertyName,
-                                   const CFX_WideString& wsValue) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            WSToJSString(wsValue))
-      .FromJust();
-}
-
-void CFXJS_Engine::PutObjectNumber(v8::Local<v8::Object> pObj,
-                                   const CFX_WideString& wsPropertyName,
-                                   int nValue) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            v8::Int32::New(m_isolate, nValue))
-      .FromJust();
-}
-
-void CFXJS_Engine::PutObjectNumber(v8::Local<v8::Object> pObj,
-                                   const CFX_WideString& wsPropertyName,
-                                   float fValue) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            v8::Number::New(m_isolate, (double)fValue))
-      .FromJust();
-}
-
-void CFXJS_Engine::PutObjectNumber(v8::Local<v8::Object> pObj,
-                                   const CFX_WideString& wsPropertyName,
-                                   double dValue) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            v8::Number::New(m_isolate, (double)dValue))
-      .FromJust();
-}
-
-void CFXJS_Engine::PutObjectBoolean(v8::Local<v8::Object> pObj,
-                                    const CFX_WideString& wsPropertyName,
-                                    bool bValue) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            v8::Boolean::New(m_isolate, bValue))
-      .FromJust();
-}
-
-void CFXJS_Engine::PutObjectObject(v8::Local<v8::Object> pObj,
-                                   const CFX_WideString& wsPropertyName,
-                                   v8::Local<v8::Object> pPut) {
+void CFXJS_Engine::PutObjectProperty(v8::Local<v8::Object> pObj,
+                                     const CFX_WideString& wsPropertyName,
+                                     v8::Local<v8::Value> pPut) {
   if (pObj.IsEmpty())
     return;
   pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName), pPut)
       .FromJust();
 }
 
-void CFXJS_Engine::PutObjectNull(v8::Local<v8::Object> pObj,
-                                 const CFX_WideString& wsPropertyName) {
-  if (pObj.IsEmpty())
-    return;
-  pObj->Set(m_isolate->GetCurrentContext(), WSToJSString(wsPropertyName),
-            v8::Local<v8::Object>())
-      .FromJust();
-}
 
 v8::Local<v8::Array> CFXJS_Engine::NewArray() {
   return v8::Array::New(m_isolate);
@@ -724,8 +666,8 @@
   return v8::Boolean::New(m_isolate, b);
 }
 
-v8::Local<v8::Value> CFXJS_Engine::NewString(const wchar_t* str) {
-  return WSToJSString(str);
+v8::Local<v8::Value> CFXJS_Engine::NewString(const CFX_WideString& str) {
+  return WSToJSString(str.c_str());
 }
 
 v8::Local<v8::Value> CFXJS_Engine::NewNull() {
@@ -752,30 +694,30 @@
   return pValue->ToBoolean(context).ToLocalChecked()->Value();
 }
 
-double CFXJS_Engine::ToNumber(v8::Local<v8::Value> pValue) {
+double CFXJS_Engine::ToDouble(v8::Local<v8::Value> pValue) {
   if (pValue.IsEmpty())
     return 0.0;
   v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
   return pValue->ToNumber(context).ToLocalChecked()->Value();
 }
 
-v8::Local<v8::Object> CFXJS_Engine::ToObject(v8::Local<v8::Value> pValue) {
+CFX_WideString CFXJS_Engine::ToWideString(v8::Local<v8::Value> pValue) {
   if (pValue.IsEmpty())
-    return v8::Local<v8::Object>();
-  v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
-  return pValue->ToObject(context).ToLocalChecked();
-}
-
-CFX_WideString CFXJS_Engine::ToString(v8::Local<v8::Value> pValue) {
-  if (pValue.IsEmpty())
-    return L"";
+    return CFX_WideString();
   v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
   v8::String::Utf8Value s(pValue->ToString(context).ToLocalChecked());
   return CFX_WideString::FromUTF8(CFX_ByteStringC(*s, s.length()));
 }
 
+v8::Local<v8::Object> CFXJS_Engine::ToObject(v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty() || !pValue->IsObject())
+    return v8::Local<v8::Object>();
+  v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
+  return pValue->ToObject(context).ToLocalChecked();
+}
+
 v8::Local<v8::Array> CFXJS_Engine::ToArray(v8::Local<v8::Value> pValue) {
-  if (pValue.IsEmpty())
+  if (pValue.IsEmpty() || !pValue->IsArray())
     return v8::Local<v8::Array>();
   v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
   return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
diff --git a/fxjs/fxjs_v8.h b/fxjs/fxjs_v8.h
index ba72962..6cf3ca5 100644
--- a/fxjs/fxjs_v8.h
+++ b/fxjs/fxjs_v8.h
@@ -176,6 +176,7 @@
 
   v8::Local<v8::Context> NewLocalContext();
   v8::Local<v8::Context> GetPersistentContext();
+  v8::Local<v8::Object> GetThisObj();
 
   v8::Local<v8::Value> NewNull();
   v8::Local<v8::Array> NewArray();
@@ -183,18 +184,18 @@
   v8::Local<v8::Value> NewNumber(double number);
   v8::Local<v8::Value> NewNumber(float number);
   v8::Local<v8::Value> NewBoolean(bool b);
-  v8::Local<v8::Value> NewString(const wchar_t* str);
+  v8::Local<v8::Value> NewString(const CFX_WideString& str);
   v8::Local<v8::Date> NewDate(double d);
   v8::Local<v8::Object> NewFxDynamicObj(int nObjDefnID, bool bStatic = false);
 
-  v8::Local<v8::Object> GetThisObj();
   int ToInt32(v8::Local<v8::Value> pValue);
   bool ToBoolean(v8::Local<v8::Value> pValue);
-  double ToNumber(v8::Local<v8::Value> pValue);
-  CFX_WideString ToString(v8::Local<v8::Value> pValue);
+  double ToDouble(v8::Local<v8::Value> pValue);
+  CFX_WideString ToWideString(v8::Local<v8::Value> pValue);
   v8::Local<v8::Object> ToObject(v8::Local<v8::Value> pValue);
   v8::Local<v8::Array> ToArray(v8::Local<v8::Value> pValue);
 
+  // Arrays.
   unsigned GetArrayLength(v8::Local<v8::Array> pArray);
   v8::Local<v8::Value> GetArrayElement(v8::Local<v8::Array> pArray,
                                        unsigned index);
@@ -202,31 +203,14 @@
                            unsigned index,
                            v8::Local<v8::Value> pValue);
 
+  // Objects.
   std::vector<CFX_WideString> GetObjectPropertyNames(
       v8::Local<v8::Object> pObj);
   v8::Local<v8::Value> GetObjectProperty(v8::Local<v8::Object> pObj,
                                          const CFX_WideString& PropertyName);
-
-  void PutObjectString(v8::Local<v8::Object> pObj,
-                       const CFX_WideString& wsPropertyName,
-                       const CFX_WideString& wsValue);
-  void PutObjectNumber(v8::Local<v8::Object> pObj,
-                       const CFX_WideString& PropertyName,
-                       int nValue);
-  void PutObjectNumber(v8::Local<v8::Object> pObj,
-                       const CFX_WideString& PropertyName,
-                       float fValue);
-  void PutObjectNumber(v8::Local<v8::Object> pObj,
-                       const CFX_WideString& PropertyName,
-                       double dValue);
-  void PutObjectBoolean(v8::Local<v8::Object> pObj,
-                        const CFX_WideString& PropertyName,
-                        bool bValue);
-  void PutObjectObject(v8::Local<v8::Object> pObj,
-                       const CFX_WideString& PropertyName,
-                       v8::Local<v8::Object> pPut);
-  void PutObjectNull(v8::Local<v8::Object> pObj,
-                     const CFX_WideString& PropertyName);
+  void PutObjectProperty(v8::Local<v8::Object> pObj,
+                         const CFX_WideString& PropertyName,
+                         v8::Local<v8::Value> pValue);
 
   // Native object binding.
   void SetObjectPrivate(v8::Local<v8::Object> pObj, void* p);
diff --git a/fxjs/fxjs_v8_embeddertest.cpp b/fxjs/fxjs_v8_embeddertest.cpp
index a877a36..4d05a20 100644
--- a/fxjs/fxjs_v8_embeddertest.cpp
+++ b/fxjs/fxjs_v8_embeddertest.cpp
@@ -28,7 +28,7 @@
     v8::Local<v8::Object> This = engine()->GetThisObj();
     v8::Local<v8::Value> fred = engine()->GetObjectProperty(This, L"fred");
     EXPECT_TRUE(fred->IsNumber());
-    EXPECT_EQ(expected, engine()->ToNumber(fred));
+    EXPECT_EQ(expected, engine()->ToDouble(fred));
   }
 };
 
@@ -74,3 +74,140 @@
   engine2.ReleaseEngine();
   CheckAssignmentInCurrentContext(kExpected0);
 }
+
+TEST_F(FXJSV8EmbedderTest, EmptyLocal) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  v8::Local<v8::Value> empty;
+  EXPECT_FALSE(engine()->ToBoolean(empty));
+  EXPECT_EQ(0, engine()->ToInt32(empty));
+  EXPECT_EQ(0.0, engine()->ToDouble(empty));
+  EXPECT_EQ(L"", engine()->ToWideString(empty));
+  EXPECT_TRUE(engine()->ToObject(empty).IsEmpty());
+  EXPECT_TRUE(engine()->ToArray(empty).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewNull) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto nullz = engine()->NewNull();
+  EXPECT_FALSE(engine()->ToBoolean(nullz));
+  EXPECT_EQ(0, engine()->ToInt32(nullz));
+  EXPECT_EQ(0.0, engine()->ToDouble(nullz));
+  EXPECT_EQ(L"", engine()->ToWideString(nullz));
+  EXPECT_TRUE(engine()->ToObject(nullz).IsEmpty());
+  EXPECT_TRUE(engine()->ToArray(nullz).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewBoolean) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto boolz = engine()->NewBoolean(true);
+  EXPECT_TRUE(engine()->ToBoolean(boolz));
+  EXPECT_EQ(1, engine()->ToInt32(boolz));
+  EXPECT_EQ(1.0, engine()->ToDouble(boolz));
+  EXPECT_EQ(L"true", engine()->ToWideString(boolz));
+  EXPECT_TRUE(engine()->ToObject(boolz).IsEmpty());
+  EXPECT_TRUE(engine()->ToArray(boolz).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewNumber) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto num = engine()->NewNumber(42.1);
+  EXPECT_TRUE(engine()->ToBoolean(num));
+  EXPECT_EQ(42, engine()->ToInt32(num));
+  EXPECT_EQ(42.1, engine()->ToDouble(num));
+  EXPECT_EQ(L"42.1", engine()->ToWideString(num));
+  EXPECT_TRUE(engine()->ToObject(num).IsEmpty());
+  EXPECT_TRUE(engine()->ToArray(num).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewString) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto str = engine()->NewString(L"123");
+  EXPECT_TRUE(engine()->ToBoolean(str));
+  EXPECT_EQ(123, engine()->ToInt32(str));
+  EXPECT_EQ(123, engine()->ToDouble(str));
+  EXPECT_EQ(L"123", engine()->ToWideString(str));
+  EXPECT_TRUE(engine()->ToObject(str).IsEmpty());
+  EXPECT_TRUE(engine()->ToArray(str).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewDate) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto date = engine()->NewDate(1111111111);
+  EXPECT_TRUE(engine()->ToBoolean(date));
+  EXPECT_EQ(1111111111, engine()->ToInt32(date));
+  EXPECT_EQ(1111111111.0, engine()->ToDouble(date));
+  EXPECT_NE(L"", engine()->ToWideString(date));  // exact format varies.
+  EXPECT_TRUE(engine()->ToObject(date)->IsObject());
+  EXPECT_TRUE(engine()->ToArray(date).IsEmpty());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewArray) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto array = engine()->NewArray();
+  EXPECT_EQ(0u, engine()->GetArrayLength(array));
+  EXPECT_FALSE(engine()->GetArrayElement(array, 2).IsEmpty());
+  EXPECT_TRUE(engine()->GetArrayElement(array, 2)->IsUndefined());
+  EXPECT_EQ(0u, engine()->GetArrayLength(array));
+
+  engine()->PutArrayElement(array, 3, engine()->NewNumber(12));
+  EXPECT_FALSE(engine()->GetArrayElement(array, 2).IsEmpty());
+  EXPECT_TRUE(engine()->GetArrayElement(array, 2)->IsUndefined());
+  EXPECT_FALSE(engine()->GetArrayElement(array, 3).IsEmpty());
+  EXPECT_TRUE(engine()->GetArrayElement(array, 3)->IsNumber());
+  EXPECT_EQ(4u, engine()->GetArrayLength(array));
+
+  EXPECT_TRUE(engine()->ToBoolean(array));
+  EXPECT_EQ(0, engine()->ToInt32(array));
+  double d = engine()->ToDouble(array);
+  EXPECT_NE(d, d);  // i.e. NaN.
+  EXPECT_EQ(L",,,12", engine()->ToWideString(array));
+  EXPECT_TRUE(engine()->ToObject(array)->IsObject());
+  EXPECT_TRUE(engine()->ToArray(array)->IsArray());
+}
+
+TEST_F(FXJSV8EmbedderTest, NewObject) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  auto object = engine()->NewFxDynamicObj(-1);
+  EXPECT_EQ(0u, engine()->GetObjectPropertyNames(object).size());
+  EXPECT_FALSE(engine()->GetObjectProperty(object, L"clams").IsEmpty());
+  EXPECT_TRUE(engine()->GetObjectProperty(object, L"clams")->IsUndefined());
+  EXPECT_EQ(0u, engine()->GetObjectPropertyNames(object).size());
+
+  engine()->PutObjectProperty(object, L"clams", engine()->NewNumber(12));
+  EXPECT_FALSE(engine()->GetObjectProperty(object, L"clams").IsEmpty());
+  EXPECT_TRUE(engine()->GetObjectProperty(object, L"clams")->IsNumber());
+  EXPECT_EQ(1u, engine()->GetObjectPropertyNames(object).size());
+  EXPECT_EQ(L"clams", engine()->GetObjectPropertyNames(object)[0]);
+
+  EXPECT_TRUE(engine()->ToBoolean(object));
+  EXPECT_EQ(0, engine()->ToInt32(object));
+  double d = engine()->ToDouble(object);
+  EXPECT_NE(d, d);  // i.e. NaN.
+  EXPECT_EQ(L"[object Object]", engine()->ToWideString(object));
+  EXPECT_TRUE(engine()->ToObject(object)->IsObject());
+  EXPECT_TRUE(engine()->ToArray(object).IsEmpty());
+}