fix examples for Yjs@13

src/Struct/Item.js

@@ -113,9 +113,11 @@ export default class Item {
    * - Check if this is struct deleted
    */
   _integrate (y) {
+    y._transaction.newTypes.add(this)
     const parent = this._parent
     const selfID = this._id
-    const userState = selfID === null ? 0 : y.ss.getState(selfID.user)
+    const user = selfID === null ? y.userID : selfID.user
+    const userState = y.ss.getState(user)
     if (selfID === null) {
       this._id = y.ss.getNextID(this._length)
     } else if (selfID.user === RootFakeUserID) {

src/Struct/Type.js

@@ -133,7 +133,6 @@ export default class Type extends Item {
     this._deepEventHandler.removeEventListener(f)
   }
   _integrate (y) {
-    y._transaction.newTypes.add(this)
     super._integrate(y)
     this._y = y
     // when integrating children we must make sure to

src/Type/YArray.js

@@ -9,17 +9,21 @@ class YArrayEvent extends YEvent {
     super(yarray)
     this.remote = remote
     this._transaction = transaction
+    this._addedElements = null
   }
   get addedElements () {
-    const target = this.target
-    const transaction = this._transaction
-    const addedElements = new Set()
-    transaction.newTypes.forEach(function (type) {
-      if (type._parent === target && !transaction.deletedStructs.has(type)) {
-        addedElements.add(type)
-      }
-    })
-    return addedElements
+    if (this._addedElements === null) {
+      const target = this.target
+      const transaction = this._transaction
+      const addedElements = new Set()
+      transaction.newTypes.forEach(function (type) {
+        if (type._parent === target && !transaction.deletedStructs.has(type)) {
+          addedElements.add(type)
+        }
+      })
+      this._addedElements = addedElements
+    }
+    return this._addedElements
   }
   get removedElements () {
     const target = this.target