Does not work in production mode when used on a Gatsby site

[rennehir]

"dependencies": {
    "gatsby": "^2.0.0",
    "react-scroll-to-component-ssr": "^1.0.0",
    ...
}

Tried with the ssr version and the original one. Works with gatsby develop but not when built and served. Is there a plugin I need or have I missed something?

[valse]

Hi,
same problem here: this is my error with gatsby build:

Module not found: Error: Can't resolve 'raf'

[WhippetsAintDogs]

Same here. Even after installing missing raf and tween as peer dependencies.

[WhippetsAintDogs]

Okay, I found a solution. It seems that a Gatsby site in production when you set a ref on a component, it stays null. But... if the ref is set on the most encapsulating element in the component's render method, it doesn't stay null.

The way to do it is to set the ref on the component and use a React.forwardRef in the component like this:

// Parent container:

this.servicesRef = React.createRef()

render() {
    return (
      <Layout>
        <Header servicesRef={this.servicesRef} /> // it won't be null if forwardRef is used in Services
        <Services
          ref={this.servicesRef}
        />
        …
      </Layout>
    )
  }

// Child component:

const Services = React.forwardRef((props, ref) => (
  <div ref={ref}>
   …
  </div>
))

[csabat]

same issue here. Is anyone come up with a solution?

[WhippetsAintDogs]

Mine works, see my previous comments 😜

[richjava]

I got it building and working in production using @WhippetsAintDogs's way. Install the two dependencies, have a look at the sample code above, and use it like this or similar:

<a onClick={() => scrollToComponent(this.servicesRef.current,{ offset: 0, align: 'middle', duration: 500, ease:'inCirc'})}>Get a project</a>

[Meberem]

I have also had fun with this issue. However I am using react hooks i.e.

const MyComponent() { 
   const ref = React.useRef<HTMLDivElement>(null)
   const appState = React.useContext(AppState)

   appState.updateRef('my-thing-to-see', ref)

   return (
       <div ref={ref}>Something to see</div>
   )
}

and the only thing I needed to do was npm install -s raf tween. I'm not sure if this is the correct way to use hooks or fix the issue but it certainly appears fixed from here