ElmComponent.js

import React, { Component } from 'react'

class ElmComponent extends Component {
  shouldComponentUpdate(prevProps) {
    return false;
  }

  render() {
    return <div ref={this.initialize}/>
  }

  initialize = node => {
    if (!node) return;
    const app = this.props.src.init({ node, flags: this.props.flags })

    if (typeof this.props.ports !== 'undefined') {
      this.props.ports(app.ports);
    }
  }
}

export default ElmComponent