refactor(defaultNode/Edges): always trigger onNodesChange and onEdgesChange

example/src/ControlledUncontrolled/index.tsx

@@ -0,0 +1,98 @@
+import ReactFlow, {
+  useReactFlow,
+  Background,
+  BackgroundVariant,
+  Node,
+  Edge,
+  ReactFlowProvider,
+  useNodesState,
+  useEdgesState,
+} from 'react-flow-renderer';
+
+const defaultNodes: Node[] = [
+  { id: '1', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 }, className: 'light' },
+  { id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 }, className: 'light' },
+  { id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },
+  { id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 200 }, className: 'light' },
+];
+
+const defaultEdges: Edge[] = [
+  { id: 'e1-2', source: '1', target: '2' },
+  { id: 'e1-3', source: '1', target: '3' },
+];
+
+const defaultEdgeOptions = {
+  animated: true,
+};
+
+// This is bad practise. You should either use a controlled or an uncontrolled component.
+// This is just an example for testing the API.
+const ControlledUncontrolled = () => {
+  const [nodes, , onNodesChange] = useNodesState(defaultNodes);
+  const [edges, , onEdgesChange] = useEdgesState(defaultEdges);
+  const instance = useReactFlow();
+
+  const logToObject = () => console.log(instance.toObject());
+  const resetTransform = () => instance.setViewport({ x: 0, y: 0, zoom: 1 });
+
+  const updateNodePositions = () => {
+    instance.setNodes((nodes) =>
+      nodes.map((node) => {
+        node.position = {
+          x: Math.random() * 400,
+          y: Math.random() * 400,
+        };
+
+        return node;
+      })
+    );
+  };
+
+  const updateEdgeColors = () => {
+    instance.setEdges((edges) =>
+      edges.map((edge) => {
+        edge.style = {
+          stroke: '#ff5050',
+        };
+
+        return edge;
+      })
+    );
+  };
+
+  return (
+    <ReactFlow
+      nodes={nodes}
+      edges={edges}
+      defaultNodes={defaultNodes}
+      defaultEdges={defaultEdges}
+      onNodesChange={onNodesChange}
+      onEdgesChange={onEdgesChange}
+      defaultEdgeOptions={defaultEdgeOptions}
+      fitViewOnInit
+    >
+      <Background variant={BackgroundVariant.Lines} />
+
+      <div style={{ position: 'absolute', right: 10, top: 10, zIndex: 4 }}>
+        <button onClick={resetTransform} style={{ marginRight: 5 }}>
+          reset transform
+        </button>
+        <button onClick={updateNodePositions} style={{ marginRight: 5 }}>
+          change pos
+        </button>
+        <button onClick={updateEdgeColors} style={{ marginRight: 5 }}>
+          red edges
+        </button>
+        <button onClick={logToObject}>toObject</button>
+      </div>
+    </ReactFlow>
+  );
+};
+
+export default function App() {
+  return (
+    <ReactFlowProvider>
+      <ControlledUncontrolled />
+    </ReactFlowProvider>
+  );
+}

example/src/index.tsx

@@ -32,6 +32,7 @@ import SaveRestore from './SaveRestore';
 import SwitchFlow from './Switch';
 import Validation from './Validation';
 import DefaultNodes from './DefaultNodes';
+import ControlledUncontrolled from './ControlledUncontrolled';
 
 import './index.css';
 
@@ -156,6 +157,10 @@ const routes = [
     path: '/validation',
     component: Validation,
   },
+  {
+    path: '/controlled-uncontrolled',
+    component: ControlledUncontrolled,
+  },
 ];
 
 const Header = withRouter(({ history, location }) => {