From 8706bbb0442e205f774a5fa445fc01392a31d0b6 Mon Sep 17 00:00:00 2001
From: Yousef El-Dardiry <yousefdardiry@gmail.com>
Date: Wed, 5 May 2021 11:41:27 +0200
Subject: [PATCH] add typeCreatedEventHandler

---
 src/index.js              |  7 +++----
 src/types/AbstractType.js | 17 +++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/index.js b/src/index.js
index f2e20b54..bc93ee88 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,7 +1,7 @@
-
 export {
   Doc,
   Transaction,
+  observeTypeCreated,
   YArray as Array,
   YMap as Map,
   YText as Text,
@@ -25,7 +25,6 @@ export {
   ContentAny,
   ContentString,
   ContentType,
-  typeRefs,
   AbstractType,
   RelativePosition,
   getTypeChildren,
@@ -82,5 +81,5 @@ export {
   encodeRelativePosition,
   decodeRelativePosition,
   diffUpdate,
-  diffUpdateV2
-} from './internals.js'
+  diffUpdateV2,
+} from "./internals.js";
diff --git a/src/types/AbstractType.js b/src/types/AbstractType.js
index 76a88a33..e9fa17fa 100644
--- a/src/types/AbstractType.js
+++ b/src/types/AbstractType.js
@@ -248,6 +248,21 @@ export const callTypeObservers = (type, transaction, event) => {
   callEventHandlerListeners(changedType._eH, event, transaction)
 }
 
+/**
+ * Event handlers
+ * @type {EventHandler<AbstractType<any>, undefined>}
+ */
+const typeCreatedEventHandler = createEventHandler();
+
+/**
+ * Observe all events that are created on this type.
+ *
+ * @param {function(AbstractType<any>, undefined):void} f Observer function
+ */
+export function observeTypeCreated (f) {
+  addEventHandlerListener(typeCreatedEventHandler, f)
+}
+
 /**
  * @template EventType
  * Abstract Yjs Type class
@@ -285,6 +300,8 @@ export class AbstractType {
      * @type {null | Array<ArraySearchMarker>}
      */
     this._searchMarker = null
+
+    callEventHandlerListeners(typeCreatedEventHandler, this, undefined);
   }
 
   /**