From 596ddd21bc03d0b89e36a03608b08b3150a23944 Mon Sep 17 00:00:00 2001
From: moklick <info@moritzklack.com>
Date: Tue, 30 Aug 2022 22:00:55 +0200
Subject: [PATCH 1/2] feat(hooks): add useNodesInitialized

---
 packages/core/src/hooks/useNodesInitialized.ts | 12 ++++++++++++
 packages/core/src/index.ts                     |  2 ++
 2 files changed, 14 insertions(+)
 create mode 100644 packages/core/src/hooks/useNodesInitialized.ts

diff --git a/packages/core/src/hooks/useNodesInitialized.ts b/packages/core/src/hooks/useNodesInitialized.ts
new file mode 100644
index 00000000..3612253d
--- /dev/null
+++ b/packages/core/src/hooks/useNodesInitialized.ts
@@ -0,0 +1,12 @@
+import { ReactFlowState } from '../types';
+import { useStore } from './useStore';
+
+const selector = (s: ReactFlowState) => Array.from(s.nodeInternals.values()).every((n) => n.width && n.height);
+
+function useNodesInitialized(): boolean {
+  const initialized = useStore(selector);
+
+  return initialized;
+}
+
+export default useNodesInitialized;
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 0f2ce6a6..4777566e 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -41,5 +41,7 @@ export { default as useKeyPress } from './hooks/useKeyPress';
 export * from './hooks/useNodesEdgesState';
 export { useStore, useStoreApi } from './hooks/useStore';
 export { default as useOnViewportChange } from './hooks/useOnViewportChange';
+export { default as useOnSelectionChange } from './hooks/useOnSelectionChange';
+export { default as useNodesInitialized } from './hooks/useNodesInitialized';
 
 export * from './types';

From f40788ba4b520ac77efd82282246e1634c4b1ede Mon Sep 17 00:00:00 2001
From: moklick <info@moritzklack.com>
Date: Tue, 30 Aug 2022 22:15:14 +0200
Subject: [PATCH 2/2] refactor(useNodesInit): check for handleBounds, false for
 no nodes

---
 packages/core/src/hooks/useNodesInitialized.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/hooks/useNodesInitialized.ts b/packages/core/src/hooks/useNodesInitialized.ts
index 3612253d..1f2b1f56 100644
--- a/packages/core/src/hooks/useNodesInitialized.ts
+++ b/packages/core/src/hooks/useNodesInitialized.ts
@@ -1,7 +1,14 @@
 import { ReactFlowState } from '../types';
+import { internalsSymbol } from '../utils';
 import { useStore } from './useStore';
 
-const selector = (s: ReactFlowState) => Array.from(s.nodeInternals.values()).every((n) => n.width && n.height);
+const selector = (s: ReactFlowState) => {
+  if (s.nodeInternals.size === 0) {
+    return false;
+  }
+
+  return Array.from(s.nodeInternals.values()).every((n) => n[internalsSymbol]?.handleBounds !== undefined);
+};
 
 function useNodesInitialized(): boolean {
   const initialized = useStore(selector);