How do I retrieve the variable value aptly in react with callback function?-CodePudding

I have this code in react app:

function xyz (callback) { 
  axios.get(`https://example.com`)
    .then(res => {
      const filepath = res.data.Items[0].filepath.S
      callback ({autoplay: false, controls: true,sources: [{src: filepath}]})
    }).catch(err =>{
      console.log(err);
    })
  }

function App() {
  return (
    <VideoPlayer { ...xyz(function(response) {console.log(response)});} />
  )
}

This works as expected and I can log the response. But what I am trying to do is assign the response of the xyz function directly within the VideoPlayer tags.

For e.g., What I want to achieve is:

<VideoPlayer {...return-value-of-xyz-function}

How do I achieve this? Happy to provide more context if needed. Thanks!

CodePudding user response：

Render functions are always synchronous. Because your xyz function is asynchronous, you have to deal with all of the intermediary state: loading, error, no data, etc.

I recommend creating a hook for this type of stuff, that way you can establish a pattern and reuse around your app. Or you can take the code from the hook and put it directly in your App function - it's up to you.

const useFetchData = (url) => {
  const [state, setState] = useState({ isLoading: true, error: null, data: null });
  useEffect(() => {
    axios.get(url)
      .then((res) => {
        setState({ isLoading: false, data: res.data, error: null });
      })
      .catch((error) => {
        setState({ isLoading: false, data: null, error });
      });
  }, [url]);
  return state;
};

const App = () => {
  const { isLoading, data, error } = useFetchData("https://example.com");

  if (isLoading) return <div>Loading...</div>;
  if (error) return <div>There was an error: {error}</div>;
  return <VideoPlayer {...data} />;
};