refactor(examples): use cra + ts

example/src/Basic/index.tsx

@@ -0,0 +1,97 @@
+import React, { useState, MouseEvent } from 'react';
+
+import ReactFlow, {
+  removeElements,
+  addEdge,
+  isNode,
+  Background,
+  Elements,
+  BackgroundVariant,
+  FlowElement,
+  Node,
+  Edge,
+  Connection,
+  OnLoadParams,
+} from 'react-flow-renderer';
+
+const onNodeDragStop = (_: MouseEvent, node: Node) => console.log('drag stop', node);
+const onElementClick = (_: MouseEvent, element: FlowElement) => console.log('click', element);
+
+const initialElements: Elements = [
+  { 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' },
+  { id: 'e1-2', source: '1', target: '2', animated: true },
+  { id: 'e1-3', source: '1', target: '3' },
+];
+
+const BasicFlow = () => {
+  const [rfInstance, setRfInstance] = useState<OnLoadParams | null>(null);
+  const [elements, setElements] = useState<Elements>(initialElements);
+  const onElementsRemove = (elementsToRemove: Elements) => setElements((els) => removeElements(elementsToRemove, els));
+  const onConnect = (params: Edge | Connection) => setElements((els) => addEdge(params, els));
+  const onLoad = (reactFlowInstance: OnLoadParams) => setRfInstance(reactFlowInstance);
+
+  const updatePos = () => {
+    setElements((elms) => {
+      return elms.map((el) => {
+        if (isNode(el)) {
+          el.position = {
+            x: Math.random() * 400,
+            y: Math.random() * 400,
+          };
+        }
+
+        return el;
+      });
+    });
+  };
+
+  const logToObject = () => console.log(rfInstance?.toObject());
+  const resetTransform = () => rfInstance?.setTransform({ x: 0, y: 0, zoom: 1 });
+
+  const toggleClassnames = () => {
+    setElements((elms) => {
+      return elms.map((el) => {
+        if (isNode(el)) {
+          el.className = el.className === 'light' ? 'dark' : 'light';
+        }
+
+        return el;
+      });
+    });
+  };
+
+  return (
+    <ReactFlow
+      elements={elements}
+      onLoad={onLoad}
+      onElementClick={onElementClick}
+      onElementsRemove={onElementsRemove}
+      onConnect={onConnect}
+      onNodeDragStop={onNodeDragStop}
+      className="react-flow-basic-example"
+      defaultZoom={1.5}
+      minZoom={0.2}
+      maxZoom={4}
+    >
+      <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={updatePos} style={{ marginRight: 5 }}>
+          change pos
+        </button>
+        <button onClick={toggleClassnames} style={{ marginRight: 5 }}>
+          toggle classnames
+        </button>
+        <button onClick={logToObject}>toObject</button>
+      </div>
+    </ReactFlow>
+  );
+};
+
+export default BasicFlow;