react-diagrams/demos/demo-simple-flow/index.tsx

import { DiagramEngine, DiagramModel, DefaultNodeModel, LinkModel, DiagramWidget } from "storm-react-diagrams";
import * as React from "react";

export default () => {
	//1) setup the diagram engine
	var engine = new DiagramEngine();
	engine.installDefaults();

	//2) setup the diagram model
	var model = new DiagramModel();

	//3-A) create a default node
	var node1 = new DefaultNodeModel("Node 1", "rgb(0,192,255)");
	var port1 = node1.addOutPort("Out");
	node1.setPosition(100, 100);

	//3-B) create another default node
	var node2 = new DefaultNodeModel("Node 2", "rgb(192,255,0)");
	var port2 = node2.addInPort("In");
	node2.setPosition(400, 100);

	//3-C) link the 2 nodes together
	var link1 = port1.link(port2);

	//3-D) create an orphaned node
	var node3 = new DefaultNodeModel("Node 3", "rgb(0,192,255)");
	node3.addOutPort("Out");
	node3.setPosition(100, 200);

	//4) add the models to the root graph
	model.addAll(node1, node2, node3, link1);

	//5) load model into engine
	engine.setModel(model);

	//6) render the diagram!
	return <DiagramWidget className="srd-demo-canvas" diagramEngine={engine} allowLooseLinks={false} />;
};