Flume

import { FlumeConfig, Controls, Colors } from "flume";

const flumeConfig = new FlumeConfig()

flumeConfig
  .addPortType({
    type: "number",
    name: "number",
    label: "Number",
    color: Colors.red,
    controls: [
      Controls.number({
        name: "num",
        label: "Number"
      })
    ]
  })
  .addNodeType({
    type: "number",
    label: "Number",
    initialWidth: 150,
    inputs: ports => [
      ports.number()
    ],
    outputs: ports => [
      ports.number()
    ]
  })
  .addNodeType({
    type: "addNumbers",
    label: "Add Numbers",
    initialWidth: 150,
    inputs: ports => [
      ports.number({name: "num1"}),
      ports.number({name: "num2"})
    ],
    outputs: ports => [
      ports.number({name: "result"})
    ]
  })

import React from 'react'
import { NodeEditor } from 'flume'
import config from './config'

const App = () => {

  return (
    <div style={{width: 600, height: 800}}> // Give the wrapper a width & height
      <NodeEditor
        nodeTypes={config.nodeTypes}
        portTypes={config.portTypes}
      />
    </div>
  )
}