diff --git a/bin/ChakraCore/ChakraCore.def b/bin/ChakraCore/ChakraCore.def
index 1602aa1de4c..9d711da224e 100644
--- a/bin/ChakraCore/ChakraCore.def
+++ b/bin/ChakraCore/ChakraCore.def
@@ -55,3 +55,6 @@ JsInitializeJITServer
 JsCreateSharedArrayBufferWithSharedContent
 JsGetSharedArrayBufferContent
 JsReleaseSharedArrayBufferContentHandle
+
+JsLessThan
+JsLessThanOrEqual
diff --git a/bin/NativeTests/JsRTApiTest.cpp b/bin/NativeTests/JsRTApiTest.cpp
index e022f7908c4..65ce8286610 100644
--- a/bin/NativeTests/JsRTApiTest.cpp
+++ b/bin/NativeTests/JsRTApiTest.cpp
@@ -2196,4 +2196,57 @@ namespace JsRTApiTest
         JsRTApiTest::RunWithAttributes(JsRTApiTest::JsCopyStringOneByteMethodTest);
     }
 
+    void JsLessThanTest(JsRuntimeAttributes attributes, JsRuntimeHandle runtime)
+    {
+        // Create some values
+        JsValueRef number1 = JS_INVALID_REFERENCE;  // number1 = 1
+        REQUIRE(JsDoubleToNumber(1, &number1) == JsNoError);
+        JsValueRef number2 = JS_INVALID_REFERENCE;  // number2 = 2
+        REQUIRE(JsDoubleToNumber(2, &number2) == JsNoError);
+        JsValueRef stringa = JS_INVALID_REFERENCE;  // stringa = "1"
+        REQUIRE(JsPointerToString(_u("1"), wcslen(_u("1")), &stringa) == JsNoError);
+        JsValueRef undefined = GetUndefined();
+        JsValueRef nullValue = JS_INVALID_REFERENCE;
+        REQUIRE(JsGetNullValue(&nullValue) == JsNoError);
+        JsValueRef trueValue = JS_INVALID_REFERENCE;
+        REQUIRE(JsGetTrueValue(&trueValue) == JsNoError);
+        JsValueRef falseValue = JS_INVALID_REFERENCE;
+        REQUIRE(JsGetFalseValue(&falseValue) == JsNoError);
+
+        bool result;
+        REQUIRE(JsLessThan(number1, number2, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThan(number1, stringa, &result) == JsNoError);
+        CHECK(result == false);
+        REQUIRE(JsLessThan(number1, undefined, &result) == JsNoError);
+        CHECK(result == false);
+        REQUIRE(JsLessThan(falseValue, trueValue, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThan(undefined, undefined, &result) == JsNoError);
+        CHECK(result == false);
+        REQUIRE(JsLessThan(nullValue, undefined, &result) == JsNoError);
+        CHECK(result == false);
+
+        REQUIRE(JsLessThanOrEqual(number1, number2, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThanOrEqual(number1, number1, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThanOrEqual(number1, stringa, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThanOrEqual(trueValue, trueValue, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThanOrEqual(falseValue, nullValue, &result) == JsNoError);
+        CHECK(result == true);
+        REQUIRE(JsLessThanOrEqual(falseValue, undefined, &result) == JsNoError);
+        CHECK(result == false);
+        REQUIRE(JsLessThanOrEqual(undefined, undefined, &result) == JsNoError);
+        CHECK(result == false);
+        REQUIRE(JsLessThanOrEqual(nullValue, undefined, &result) == JsNoError);
+        CHECK(result == false);
+    }
+
+    TEST_CASE("ApiTest_JsLessThanTest", "[ApiTest]")
+    {
+        JsRTApiTest::RunWithAttributes(JsRTApiTest::JsLessThanTest);
+    }
 }
diff --git a/lib/Jsrt/ChakraCore.h b/lib/Jsrt/ChakraCore.h
index f0680558a83..c685550496a 100644
--- a/lib/Jsrt/ChakraCore.h
+++ b/lib/Jsrt/ChakraCore.h
@@ -745,5 +745,51 @@ CHAKRA_API
         _Out_opt_ unsigned int *byteOffset,
         _Out_opt_ unsigned int *byteLength);
 
+/// <summary>
+///     Determine if one JavaScript value is less than another JavaScript value.
+/// </summary>
+/// <remarks>
+///     <para>
+///     This function is equivalent to the <c>&lt;</c> operator in Javascript.
+///     </para>
+///     <para>
+///     Requires an active script context.
+///     </para>
+/// </remarks>
+/// <param name="object1">The first object to compare.</param>
+/// <param name="object2">The second object to compare.</param>
+/// <param name="result">Whether object1 is less than object2.</param>
+/// <returns>
+///     The code <c>JsNoError</c> if the operation succeeded, a failure code otherwise.
+/// </returns>
+CHAKRA_API
+JsLessThan(
+    _In_ JsValueRef object1,
+    _In_ JsValueRef object2,
+    _Out_ bool *result);
+
+/// <summary>
+///     Determine if one JavaScript value is less than or equal to another JavaScript value.
+/// </summary>
+/// <remarks>
+///     <para>
+///     This function is equivalent to the <c>&lt;=</c> operator in Javascript.
+///     </para>
+///     <para>
+///     Requires an active script context.
+///     </para>
+/// </remarks>
+/// <param name="object1">The first object to compare.</param>
+/// <param name="object2">The second object to compare.</param>
+/// <param name="result">Whether object1 is less than or equal to object2.</param>
+/// <returns>
+///     The code <c>JsNoError</c> if the operation succeeded, a failure code otherwise.
+/// </returns>
+CHAKRA_API
+JsLessThanOrEqual(
+    _In_ JsValueRef object1,
+    _In_ JsValueRef object2,
+    _Out_ bool *result);
+
 #endif // _CHAKRACOREBUILD
 #endif // _CHAKRACORE_H_
diff --git a/lib/Jsrt/Jsrt.cpp b/lib/Jsrt/Jsrt.cpp
index 549d980ff63..392205a15ed 100644
--- a/lib/Jsrt/Jsrt.cpp
+++ b/lib/Jsrt/Jsrt.cpp
@@ -2221,6 +2221,36 @@ CHAKRA_API JsGetIndexedPropertiesExternalData(
     END_JSRT_NO_EXCEPTION
 }
 
+CHAKRA_API JsLessThan(_In_ JsValueRef object1, _In_ JsValueRef object2, _Out_ bool *result)
+{
+    return ContextAPIWrapper<JSRT_MAYBE_TRUE>([&](Js::ScriptContext *scriptContext, TTDRecorder& _actionEntryPopper) -> JsErrorCode {
+        PERFORM_JSRT_TTD_RECORD_ACTION(scriptContext, RecordJsRTLessThan, object1, object2, false);
+
+        VALIDATE_INCOMING_REFERENCE(object1, scriptContext);
+        VALIDATE_INCOMING_REFERENCE(object2, scriptContext);
+        PARAM_NOT_NULL(result);
+
+        *result = Js::JavascriptOperators::Less((Js::Var)object1, (Js::Var)object2, scriptContext) != 0;
+
+        return JsNoError;
+    });
+}
+
+CHAKRA_API JsLessThanOrEqual(_In_ JsValueRef object1, _In_ JsValueRef object2, _Out_ bool *result)
+{
+    return ContextAPIWrapper<JSRT_MAYBE_TRUE>([&](Js::ScriptContext *scriptContext, TTDRecorder& _actionEntryPopper) -> JsErrorCode {
+        PERFORM_JSRT_TTD_RECORD_ACTION(scriptContext, RecordJsRTLessThan, object1, object2, true);
+
+        VALIDATE_INCOMING_REFERENCE(object1, scriptContext);
+        VALIDATE_INCOMING_REFERENCE(object2, scriptContext);
+        PARAM_NOT_NULL(result);
+
+        *result = Js::JavascriptOperators::LessEqual((Js::Var)object1, (Js::Var)object2, scriptContext) != 0;
+
+        return JsNoError;
+    });
+}
+
 CHAKRA_API JsEquals(_In_ JsValueRef object1, _In_ JsValueRef object2, _Out_ bool *result)
 {
     return ContextAPIWrapper<JSRT_MAYBE_TRUE>([&] (Js::ScriptContext *scriptContext, TTDRecorder& _actionEntryPopper) -> JsErrorCode {
diff --git a/lib/Runtime/Debug/TTActionEvents.cpp b/lib/Runtime/Debug/TTActionEvents.cpp
index 060c2aadd7c..97089378c86 100644
--- a/lib/Runtime/Debug/TTActionEvents.cpp
+++ b/lib/Runtime/Debug/TTActionEvents.cpp
@@ -536,6 +536,26 @@ namespace TTD
             }
         }
 
+        void LessThanAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext)
+        {
+            TTD_REPLAY_ACTIVE_CONTEXT(executeContext);
+            const JsRTDoubleVarSingleScalarArgumentAction* action = GetInlineEventDataAs<JsRTDoubleVarSingleScalarArgumentAction, EventKind::LessThanActionTag>(evt);
+            Js::Var object1 = InflateVarInReplay(executeContext, GetVarItem_0(action));
+            TTD_REPLAY_VALIDATE_INCOMING_REFERENCE(object1, ctx);
+            Js::Var object2 = InflateVarInReplay(executeContext, GetVarItem_1(action));
+            TTD_REPLAY_VALIDATE_INCOMING_REFERENCE(object2, ctx);
+
+            //Result is not needed but trigger computation for any effects
+            if (GetScalarItem_0(action))
+            {
+                Js::JavascriptOperators::LessEqual(object1, object2, ctx);
+            }
+            else
+            {
+                Js::JavascriptOperators::Less(object1, object2, ctx);
+            }
+        }
+
         void GetPropertyIdFromSymbolAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext)
         {
             TTD_REPLAY_ACTIVE_CONTEXT(executeContext);
diff --git a/lib/Runtime/Debug/TTActionEvents.h b/lib/Runtime/Debug/TTActionEvents.h
index 14b00f931a4..51113d6d88d 100644
--- a/lib/Runtime/Debug/TTActionEvents.h
+++ b/lib/Runtime/Debug/TTActionEvents.h
@@ -492,6 +492,7 @@ namespace TTD
         void HasOwnPropertyAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext);
         void InstanceOfAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext);
         void EqualsAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext);
+        void LessThanAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext);
 
         void GetPropertyIdFromSymbolAction_Execute(const EventLogEntry* evt, ThreadContextTTD* executeContext);
 
diff --git a/lib/Runtime/Debug/TTEventLog.cpp b/lib/Runtime/Debug/TTEventLog.cpp
index 0fe5925d57e..6ec19116320 100644
--- a/lib/Runtime/Debug/TTEventLog.cpp
+++ b/lib/Runtime/Debug/TTEventLog.cpp
@@ -551,6 +551,7 @@ namespace TTD
         TTD_CREATE_EVENTLIST_VTABLE_ENTRY_COMMON(HasOwnPropertyActionTag, ContextAPIWrapper, JsRTSingleVarScalarArgumentAction, HasOwnPropertyAction_Execute);
         TTD_CREATE_EVENTLIST_VTABLE_ENTRY_COMMON(InstanceOfActionTag, ContextAPIWrapper, JsRTDoubleVarArgumentAction, InstanceOfAction_Execute);
         TTD_CREATE_EVENTLIST_VTABLE_ENTRY_COMMON(EqualsActionTag, ContextAPIWrapper, JsRTDoubleVarSingleScalarArgumentAction, EqualsAction_Execute);
+        TTD_CREATE_EVENTLIST_VTABLE_ENTRY_COMMON(LessThanActionTag, ContextAPIWrapper, JsRTDoubleVarSingleScalarArgumentAction, LessThanAction_Execute);
 
         TTD_CREATE_EVENTLIST_VTABLE_ENTRY_COMMON(GetPropertyIdFromSymbolTag, ContextAPINoScriptWrapper, JsRTSingleVarArgumentAction, GetPropertyIdFromSymbolAction_Execute);
 
@@ -2200,6 +2201,17 @@ namespace TTD
         actionPopper.InitializeWithEventAndEnter(evt);
     }
 
+    void EventLog::RecordJsRTLessThan(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var var1, Js::Var var2, bool allowsEqual)
+    {
+        NSLogEvents::JsRTDoubleVarSingleScalarArgumentAction* gpAction = nullptr;
+        NSLogEvents::EventLogEntry* evt = this->RecordGetInitializedEvent<NSLogEvents::JsRTDoubleVarSingleScalarArgumentAction, NSLogEvents::EventKind::LessThanActionTag>(&gpAction);
+        NSLogEvents::SetVarItem_0(gpAction, TTD_CONVERT_JSVAR_TO_TTDVAR(var1));
+        NSLogEvents::SetVarItem_1(gpAction, TTD_CONVERT_JSVAR_TO_TTDVAR(var2));
+        NSLogEvents::SetScalarItem_0(gpAction, allowsEqual);
+
+        actionPopper.InitializeWithEventAndEnter(evt);
+    }
+
     void EventLog::RecordJsRTGetPropertyIdFromSymbol(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var sym)
     {
         NSLogEvents::JsRTSingleVarArgumentAction* gpAction = nullptr;
diff --git a/lib/Runtime/Debug/TTEventLog.h b/lib/Runtime/Debug/TTEventLog.h
index eed4d5fa3c8..d3d7b06b66d 100644
--- a/lib/Runtime/Debug/TTEventLog.h
+++ b/lib/Runtime/Debug/TTEventLog.h
@@ -560,6 +560,7 @@ namespace TTD
         void RecordJsRTHasOwnProperty(TTDJsRTActionResultAutoRecorder& actionPopper, const Js::PropertyRecord* pRecord, Js::Var var);
         void RecordJsRTInstanceOf(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var object, Js::Var constructor);
         void RecordJsRTEquals(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var var1, Js::Var var2, bool doStrict);
+        void RecordJsRTLessThan(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var var1, Js::Var var2, bool allowsEqual);
 
         //Record getters with native results
         void RecordJsRTGetPropertyIdFromSymbol(TTDJsRTActionResultAutoRecorder& actionPopper, Js::Var sym);
diff --git a/lib/Runtime/Debug/TTEvents.h b/lib/Runtime/Debug/TTEvents.h
index bfdd041b749..1b84c70f180 100644
--- a/lib/Runtime/Debug/TTEvents.h
+++ b/lib/Runtime/Debug/TTEvents.h
@@ -142,6 +142,7 @@ namespace TTD
             HasPropertyActionTag,
             InstanceOfActionTag,
             EqualsActionTag,
+            LessThanActionTag,
 
             GetPropertyIdFromSymbolTag,