diff --git a/app/client/src/components/editorComponents/ActionCreator/Fields.tsx b/app/client/src/components/editorComponents/ActionCreator/Fields.tsx
index 1e48a6435d..44bf8a534b 100644
--- a/app/client/src/components/editorComponents/ActionCreator/Fields.tsx
+++ b/app/client/src/components/editorComponents/ActionCreator/Fields.tsx
@@ -356,7 +356,9 @@ export enum FieldType {
   DELAY_FIELD = "DELAY_FIELD",
   ID_FIELD = "ID_FIELD",
   CLEAR_INTERVAL_ID_FIELD = "CLEAR_INTERVAL_ID_FIELD",
-  // TODO - see if post message needs to accept any arguments and add them here
+  MESSAGE_FIELD = "MESSAGE_FIELD",
+  TARGET_ORIGIN_FIELD = "TARGET_ORIGIN_FIELD",
+  TRANSFER_ARRAY_FIELD = "TRANSFER_ARRAY_FIELD",
 }
 
 type FieldConfig = {
@@ -411,7 +413,7 @@ const fieldConfigs: FieldConfigs = {
           defaultParams = `"",true`;
           break;
         case ActionType.postMessage:
-          defaultParams = "() => { \n\t // add code here \n}";
+          defaultParams = `"",*,undefined`;
           break;
         default:
           break;
@@ -627,6 +629,33 @@ const fieldConfigs: FieldConfigs = {
     },
     view: ViewTypes.TEXT_VIEW,
   },
+  [FieldType.MESSAGE_FIELD]: {
+    getter: (value: string) => {
+      return textGetter(value, 0);
+    },
+    setter: (value: string, currentValue: string) => {
+      return textSetter(value, currentValue, 0);
+    },
+    view: ViewTypes.TEXT_VIEW,
+  },
+  [FieldType.TARGET_ORIGIN_FIELD]: {
+    getter: (value: string) => {
+      return textGetter(value, 1);
+    },
+    setter: (value: string, currentValue: string) => {
+      return textSetter(value, currentValue, 1);
+    },
+    view: ViewTypes.TEXT_VIEW,
+  },
+  [FieldType.TRANSFER_ARRAY_FIELD]: {
+    getter: (value: string) => {
+      return textGetter(value, 2);
+    },
+    setter: (value: string, currentValue: string) => {
+      return textSetter(value, currentValue, 2);
+    },
+    view: ViewTypes.TEXT_VIEW,
+  },
 };
 
 function renderField(props: {
@@ -798,6 +827,9 @@ function renderField(props: {
     case FieldType.DELAY_FIELD:
     case FieldType.ID_FIELD:
     case FieldType.CLEAR_INTERVAL_ID_FIELD:
+    case FieldType.MESSAGE_FIELD:
+    case FieldType.TARGET_ORIGIN_FIELD:
+    case FieldType.TRANSFER_ARRAY_FIELD:
       let fieldLabel = "";
       if (fieldType === FieldType.ALERT_TEXT_FIELD) {
         fieldLabel = "Message";
@@ -823,6 +855,12 @@ function renderField(props: {
         fieldLabel = "Id";
       } else if (fieldType === FieldType.CLEAR_INTERVAL_ID_FIELD) {
         fieldLabel = "Id";
+      } else if (fieldType === FieldType.MESSAGE_FIELD) {
+        fieldLabel = "Message";
+      } else if (fieldType === FieldType.TARGET_ORIGIN_FIELD) {
+        fieldLabel = "Target origin";
+      } else if (fieldType === FieldType.TRANSFER_ARRAY_FIELD) {
+        fieldLabel = "Transfer array (optional)";
       }
       viewElement = (view as (props: TextViewProps) => JSX.Element)({
         label: fieldLabel,
diff --git a/app/client/src/components/editorComponents/ActionCreator/index.tsx b/app/client/src/components/editorComponents/ActionCreator/index.tsx
index 58749416c0..0175321bd5 100644
--- a/app/client/src/components/editorComponents/ActionCreator/index.tsx
+++ b/app/client/src/components/editorComponents/ActionCreator/index.tsx
@@ -380,9 +380,17 @@ function getFieldFromValue(
   }
 
   if (value.indexOf("postMessage") !== -1) {
-    fields.push({
-      field: FieldType.CALLBACK_FUNCTION_FIELD,
-    });
+    fields.push(
+      {
+        field: FieldType.MESSAGE_FIELD,
+      },
+      {
+        field: FieldType.TARGET_ORIGIN_FIELD,
+      },
+      {
+        field: FieldType.TRANSFER_ARRAY_FIELD,
+      },
+    );
   }
 
   return fields;
diff --git a/app/client/src/entities/DataTree/actionTriggers.ts b/app/client/src/entities/DataTree/actionTriggers.ts
index 8601bc162f..0c345c1eac 100644
--- a/app/client/src/entities/DataTree/actionTriggers.ts
+++ b/app/client/src/entities/DataTree/actionTriggers.ts
@@ -171,7 +171,9 @@ export type ConfirmationModal = {
 export type PostMessageDescription = {
   type: ActionTriggerType.POST_MESSAGE;
   payload: {
-    callback: string;
+    message: any;
+    targetOrigin: any;
+    transfer?: any;
   };
 };
 
diff --git a/app/client/src/sagas/ActionExecution/ActionExecutionSagas.ts b/app/client/src/sagas/ActionExecution/ActionExecutionSagas.ts
index 9d3991d2d7..5b3729e6c4 100644
--- a/app/client/src/sagas/ActionExecution/ActionExecutionSagas.ts
+++ b/app/client/src/sagas/ActionExecution/ActionExecutionSagas.ts
@@ -10,8 +10,8 @@ import {
 import * as log from "loglevel";
 import { all, call, put, takeEvery, takeLatest } from "redux-saga/effects";
 import {
-  evaluateArgumentSaga,
   evaluateAndExecuteDynamicTrigger,
+  evaluateArgumentSaga,
   evaluateSnippetSaga,
   setAppVersionOnWorkerSaga,
 } from "sagas/EvaluationsSaga";
@@ -36,12 +36,12 @@ import {
   logActionExecutionError,
   TriggerFailureError,
   UncaughtPromiseError,
+  UserCancelledActionExecutionError,
 } from "sagas/ActionExecution/errorUtils";
 import {
   clearIntervalSaga,
   setIntervalSaga,
 } from "sagas/ActionExecution/SetIntervalSaga";
-import { UserCancelledActionExecutionError } from "sagas/ActionExecution/errorUtils";
 import {
   getCurrentLocationSaga,
   stopWatchCurrentLocation,
@@ -49,6 +49,7 @@ import {
 } from "sagas/ActionExecution/GetCurrentLocationSaga";
 import { requestModalConfirmationSaga } from "sagas/UtilSagas";
 import { ModalType } from "reducers/uiReducers/modalActionReducer";
+import { postMessageSaga } from "./PostMessageSaga";
 
 export type TriggerMeta = {
   source?: TriggerSource;
@@ -142,6 +143,9 @@ export function* executeActionTriggers(
         throw new UserCancelledActionExecutionError();
       }
       break;
+    case ActionTriggerType.POST_MESSAGE:
+      yield call(postMessageSaga, trigger.payload);
+      break;
     default:
       log.error("Trigger type unknown", trigger);
       throw Error("Trigger type unknown");
diff --git a/app/client/src/sagas/ActionExecution/PostMessageSaga.ts b/app/client/src/sagas/ActionExecution/PostMessageSaga.ts
new file mode 100644
index 0000000000..5b71a81516
--- /dev/null
+++ b/app/client/src/sagas/ActionExecution/PostMessageSaga.ts
@@ -0,0 +1,16 @@
+import { spawn } from "redux-saga/effects";
+import { PostMessageDescription } from "../../entities/DataTree/actionTriggers";
+import { TriggerFailureError } from "sagas/ActionExecution/errorUtils";
+
+export function* postMessageSaga(payload: PostMessageDescription["payload"]) {
+  yield spawn(executePostMessage, payload);
+}
+
+function* executePostMessage(payload: PostMessageDescription["payload"]) {
+  const { message, targetOrigin, transfer } = payload;
+  try {
+    postMessage(message, targetOrigin || "*", transfer || undefined);
+  } catch (error) {
+    throw new TriggerFailureError(error.message);
+  }
+}
diff --git a/app/client/src/workers/Actions.ts b/app/client/src/workers/Actions.ts
index bea21349b3..5ace1af966 100644
--- a/app/client/src/workers/Actions.ts
+++ b/app/client/src/workers/Actions.ts
@@ -261,11 +261,13 @@ const DATA_TREE_FUNCTIONS: Record<
         };
       },
   },
-  postMessage: function(callback) {
+  postMessage: function(message: any, targetOrigin: any, transfer?: any) {
     return {
       type: ActionTriggerType.POST_MESSAGE,
       payload: {
-        callback: callback.toString(),
+        message,
+        targetOrigin,
+        transfer,
       },
       executionType: ExecutionType.TRIGGER,
     };