carbon/pages/index.js

// Theirs
import React from 'react'
import { withRouter } from 'next/router'

// Ours
import Editor from '../components/Editor'
import Page from '../components/Page'
import api from '../lib/api'
import { updateQueryString } from '../lib/routing'
import { saveState } from '../lib/util'

class Index extends React.Component {
  onEditorUpdate = state => {
    updateQueryString(this.props.router, state)
    const s = { ...state }
    delete s.code
    delete s.backgroundImage
    delete s.backgroundImageSelection
    saveState(localStorage, s)
  }

  render() {
    return (
      <Page enableHeroText={true}>
        <Editor
          router={this.props.router}
          onUpdate={this.onEditorUpdate}
          api={api}
          onReset={onReset}
        />
      </Page>
    )
  }
}

function onReset() {
  localStorage.clear()

  if (window.navigator && navigator.serviceWorker) {
    navigator.serviceWorker.getRegistrations().then(registrations => {
      for (let registration of registrations) {
        registration.unregister()
      }
    })
  }
}

export default withRouter(Index)