TypeError: Cannot read property 'getTotalLength' of null

testing the library with the example found in the documentation presents me with the following error

TypeError: Cannot read property ‘getTotalLength’ of null

`import React from ‘react’; import logo from ‘./logo.svg’; import ‘./App.css’; import ‘…/node_modules/bootstrap/dist/css/bootstrap.min.css’; // Archivo CSS de Bootstrap 4 import ‘…/node_modules/bootstrap/dist/js/bootstrap.min.js’; // Archivo Javascript de Bootstrap 4 npm audit import createEngine, { DefaultLinkModel, DefaultNodeModel, DiagramModel } from ‘@projectstorm/react-diagrams’;

import { CanvasWidget } from ‘@projectstorm/react-canvas-core’;

// create an instance of the engine with all the defaults const engine = createEngine();

// node 1 const node1 = new DefaultNodeModel({ name: ‘Node 1’, color: ‘rgb(0,192,255)’, }); node1.setPosition(100, 100); let port1 = node1.addOutPort(‘Out’);

// node 2 const node2 = new DefaultNodeModel({ name: ‘Node 1’, color: ‘rgb(0,192,255)’, }); node2.setPosition(100, 100); let port2 = node2.addOutPort(‘Out’);

// link them and add a label to the link const link = port1.link(port2); link.addLabel(‘Hello World!’);

const model = new DiagramModel(); model.addAll(node1, node2, link); engine.setModel(model);

function App() { return ( <div className="App bg-dark"> <div class="d-flex justify-content-center"> <CanvasWidget engine={engine} /> </div> </div> ); }

export default App; `

[sagivo]

Same issue here. Removing link.addLabel('Hello World!'); solved it for me.

[JSv4]

I am seeing the same behavior. I’m following the introductoy tutorial here: https://projectstorm.gitbook.io/react-diagrams/getting-started. If I comment out the line:

link.addLabel('Hello World!');

The demo works. If I add the label, however, I get the same TypeError:

TypeError: Cannot read property 'getTotalLength' of null