metamaps--metamaps/views/metacode_sets/edit.html.erb

import React, { Component } from react

class MyComponent extends Component {
  render = () => {
    return (
<div id="yield">
  <div className='centerContent'>
    { render 'form' }
  </div>
</div>
    )
  }
}

export default MyComponent

<script>
{ Metacode.all.each do |m| }
  { if m.in_metacode_set(@metacode_set) }
    Metamaps.Admin.selectMetacodes.push("{ m.id }");
  { end }
  Metamaps.Admin.allMetacodes.push("{ m.id }");
{ end }
</script>