register React component on page with turbolinks working. The Rails parts (helper and ERB) are optional, but since this IS turbolinks, you probably ARE using rails.

action.html.erb

<h1>Oh Hai</h1>
<%= react_component 'oh-hai' %>

application_helper.rb

module ApplicationHelper

  def react_component(container, props=nil)
    content_tag(:div, nil, data: { "react-container": container, "react-props": props })
  end

end

main.js

import {registerComponent} from 'registerComponent';
import OhHai from 'oh-hai';
document.addEventListener('turbolinks:load', () => registerComponent(OhHai, 'oh-hai'));

registerComponent.js

import React from 'react'
import ReactDOM from 'react-dom'

export function registerComponent (instance, container) {
  const selector = `[data-react-container=${container}]`
  let componentEntry = document.querySelector(selector)
  if (componentEntry) {
    const propsJSON = componentEntry.getAttribute("data-react-props")
    const props = propsJSON && JSON.parse(propsJSON)
    ReactDOM.render(React.createElement(instance, props),
    componentEntry)
  }
}

the.html

<div data-react-container="oh-hai"></div>

This is a godsend!
I had to add a listener into registerComponent to trigger my components' unmount cycle, and then turbolinks and react finally got along without needing to rely on extra gems.

document.addEventListener('turbolinks:before-render', () => {
  ReactDOM.unmountComponentAtNode(componentEntry)
})

I modified mine a little to automatically require all the components and format their names like:

./icons/Hamburger.tsx -> icons-hamburger like so:

document.addEventListener('turbolinks:load', () => {
  const context = require.context('components', true, /\.tsx$/)
  context.keys().forEach((key) => {
    const {default: Component} = require(`${key}`)
    const path = key
      .substr(2)
      .replace('/', '-')
      .replace('.tsx', '')
      .toLowerCase()
    registerComponent(Component, path)
  })
})