losing functions when using recompose component as ref

Question

I have this simple component

class App extends React.Component {
  a = () => null
  b = () => null
  c = () => null

  render() {
    return (<div>hey123</div>)
  }
}

and this is my 2nd component with ref to the first one

class BApp extends React.Component {
  setComponentRef = ref => {
    console.log('ref', ref)
    this.playerComponentRef = ref
  }
  render() {
    return (
      <div>
        <App ref={this.setComponentRef} />
      </div>)
  }  
}

in this case in the console.log I will receive all App component's functions (a, b, c) but if I'll use Recompose.withState on App component I will not receive them anymore. see example here https://codepen.io/anon/pen/qYjpoE?editors=1111

to see the working way swtich

<ModifyedApp ref={this.setComponentRef} />

to

<App ref={this.setComponentRef} />

what am I missing here ? why the use of Recompose HOC is removing the App class component inner functions ?

thanks.

Answer 1

You can pass a function providerRef to your component and then provide the App instance to it like

class BApp extends React.Component {
  setComponentRef = ref => {
    console.log('ref', ref)
    this.playerComponentRef = ref
  }
  render() {
    return (
      <div>
        <App providerRef={this.setComponentRef} />
      </div>)
  }  
}


class App extends React.Component {
  a = () => null
  b = () => null
  c = () => null
  componentDidMount() {
     this.props.providerRef(this);
  }
  render() {
    return (<div>hey123</div>)
  }
}

In case of Recompose, its an HOC and hence the ref will be applied on the HOC and not the inner component, some libraries provide a withRef hook to access the innerComponent ref using this.playerComponentRef.getWrappedInstance(), however I am not sure about its availability in recompose.