README.md

useFetch

Manage the error, loading and data state of fetch

See example use here

Updates Since Video Release

• New requirement
  • Error handling
    • If the request fails due to http status (response.ok)
• New test
  • "should handle http errors correctly"

New code in solution

if (!response.ok) {
  throw new Error(response.statusText);
}

Requirements

• Accepts:
  • a generic type argument
    • returned data is typed as T
  • a url string
  • request options (optional)
    • options to pass to fetch
  • options (optional)
    • immediate - defaults to true
• Returns:
  • a loading boolean
  • an error that can be a string or null
  • a data property that can be type T or null
  • a load function
    • can be called to fetch or re-fetch the data
  • updateUrl
    • can be called to update the url and re-fetch
  • updateRequestOptions
    • can be called to update the request options and re-fetch
  • updateOptions
    • can be called to update options
• Behavior:
  • Should fetch on mount if options.immediate is true
  • Should set loading when fetching data
  • Error handling
    • If the request fails due to fetch error (e.g. Network Error)
    • If the request fails due to http status (response.ok)
    • If the json parse fails
    • If any error occurs:
      • Set the error message
      • Set data to null
      • Set loading to false
  • Should re-fetch if the url changes
  • Should re-fetch if the request options change
  • Should re-fetch if the options change and immediate is true
  • Should re-fetch if load function is called
  • Should cancel any in progress requests if a new request is made
  • Should only set the data to be the latest request that was made
  • Should cancel any in progress requests if unmounted