refactor(examples): use cra + ts

example/src/DragNDrop/Sidebar.js

@@ -1,23 +0,0 @@
-import React from 'react';
-
-export default () => {
-  const onDragStart = (event, nodeType) => {
-    event.dataTransfer.setData('application/reactflow', nodeType);
-    event.dataTransfer.effectAllowed = 'move';
-  };
-
-  return (
-    <aside>
-      <div className="description">You can drag these nodes to the pane on the right.</div>
-      <div className="dndnode input" onDragStart={(event) => onDragStart(event, 'input')} draggable>
-        Input Node
-      </div>
-      <div className="dndnode" onDragStart={(event) => onDragStart(event, 'default')} draggable>
-        Default Node
-      </div>
-      <div className="dndnode output" onDragStart={(event) => onDragStart(event, 'output')} draggable>
-        Output Node
-      </div>
-    </aside>
-  );
-};

example/src/DragNDrop/Sidebar.tsx

@@ -0,0 +1,25 @@
+import React, { DragEvent } from 'react';
+
+const onDragStart = (event: DragEvent, nodeType: string) => {
+  event.dataTransfer.setData('application/reactflow', nodeType);
+  event.dataTransfer.effectAllowed = 'move';
+};
+
+const Sidebar = () => {
+  return (
+    <aside>
+      <div className="description">You can drag these nodes to the pane on the right.</div>
+      <div className="dndnode input" onDragStart={(event: DragEvent) => onDragStart(event, 'input')} draggable>
+        Input Node
+      </div>
+      <div className="dndnode" onDragStart={(event: DragEvent) => onDragStart(event, 'default')} draggable>
+        Default Node
+      </div>
+      <div className="dndnode output" onDragStart={(event: DragEvent) => onDragStart(event, 'output')} draggable>
+        Output Node
+      </div>
+    </aside>
+  );
+};
+
+export default Sidebar;

example/src/DragNDrop/index.js

@@ -1,62 +0,0 @@
-import React, { useState } from 'react';
-import ReactFlow, { ReactFlowProvider, addEdge, removeElements, Controls } from 'react-flow-renderer';
-
-import Sidebar from './Sidebar';
-
-import './dnd.css';
-
-const initialElements = [{ id: '1', type: 'input', data: { label: 'input node' }, position: { x: 250, y: 5 } }];
-
-let id = 0;
-const getId = () => `dndnode_${id++}`;
-
-const DnDFlow = () => {
-  const [reactFlowInstance, setReactFlowInstance] = useState(null);
-  const [elements, setElements] = useState(initialElements);
-  const onConnect = (params) => setElements((els) => addEdge(params, els));
-  const onElementsRemove = (elementsToRemove) => setElements((els) => removeElements(elementsToRemove, els));
-
-  const onLoad = (_reactFlowInstance) => setReactFlowInstance(_reactFlowInstance);
-
-  const onDragOver = (event) => {
-    event.preventDefault();
-    event.dataTransfer.dropEffect = 'move';
-  };
-
-  const onDrop = (event) => {
-    event.preventDefault();
-
-    const type = event.dataTransfer.getData('application/reactflow');
-    const position = reactFlowInstance.project({ x: event.clientX, y: event.clientY - 40 });
-    const newNode = {
-      id: getId(),
-      type,
-      position,
-      data: { label: `${type} node` },
-    };
-
-    setElements((es) => es.concat(newNode));
-  };
-
-  return (
-    <div className="dndflow">
-      <ReactFlowProvider>
-        <div className="reactflow-wrapper">
-          <ReactFlow
-            elements={elements}
-            onConnect={onConnect}
-            onElementsRemove={onElementsRemove}
-            onLoad={onLoad}
-            onDrop={onDrop}
-            onDragOver={onDragOver}
-          >
-            <Controls />
-          </ReactFlow>
-        </div>
-        <Sidebar />
-      </ReactFlowProvider>
-    </div>
-  );
-};
-
-export default DnDFlow;

example/src/DragNDrop/index.tsx

@@ -0,0 +1,75 @@
+import React, { useState, DragEvent } from 'react';
+import ReactFlow, {
+  ReactFlowProvider,
+  addEdge,
+  removeElements,
+  Controls,
+  OnLoadParams,
+  Elements,
+  Connection,
+  Edge,
+  ElementId,
+  Node,
+} from 'react-flow-renderer';
+
+import Sidebar from './Sidebar';
+
+import './dnd.css';
+
+const initialElements = [{ id: '1', type: 'input', data: { label: 'input node' }, position: { x: 250, y: 5 } }];
+
+const onDragOver = (event: DragEvent) => {
+  event.preventDefault();
+  event.dataTransfer.dropEffect = 'move';
+};
+
+let id = 0;
+const getId = (): ElementId => `dndnode_${id++}`;
+
+const DnDFlow = () => {
+  const [reactFlowInstance, setReactFlowInstance] = useState<OnLoadParams>();
+  const [elements, setElements] = useState<Elements>(initialElements);
+
+  const onConnect = (params: Connection | Edge) => setElements((els) => addEdge(params, els));
+  const onElementsRemove = (elementsToRemove: Elements) => setElements((els) => removeElements(elementsToRemove, els));
+  const onLoad = (_reactFlowInstance: OnLoadParams) => setReactFlowInstance(_reactFlowInstance);
+
+  const onDrop = (event: DragEvent) => {
+    event.preventDefault();
+
+    if (reactFlowInstance) {
+      const type = event.dataTransfer.getData('application/reactflow');
+      const position = reactFlowInstance.project({ x: event.clientX, y: event.clientY - 40 });
+      const newNode: Node = {
+        id: getId(),
+        type,
+        position,
+        data: { label: `${type} node` },
+      };
+
+      setElements((es) => es.concat(newNode));
+    }
+  };
+
+  return (
+    <div className="dndflow">
+      <ReactFlowProvider>
+        <div className="reactflow-wrapper">
+          <ReactFlow
+            elements={elements}
+            onConnect={onConnect}
+            onElementsRemove={onElementsRemove}
+            onLoad={onLoad}
+            onDrop={onDrop}
+            onDragOver={onDragOver}
+          >
+            <Controls />
+          </ReactFlow>
+        </div>
+        <Sidebar />
+      </ReactFlowProvider>
+    </div>
+  );
+};
+
+export default DnDFlow;