meteor-data-v3.js

import {Meteor} from 'meteor/meteor'
import {withData} from 'meteor/orionsoft:react-meteor-data'
import MyCollection from './my-collection'

@withData(({itemId}) => {
  const handler = Meteor.subscribe('myPublication', itemId)
  const isLoading = !handler.ready()
  const item = MyCollection.findOne(itemId)
  return {isLoading, item}
})
export default class Component extends React.Component {

  render () {
    if (this.props.isLoading) return <span/>
    return (
      <div>
        {this.props.item.name}
      </div>
    )
  }

}