When using Remix v2.8.1, the function useRouteLoaderData can return undefined if an error boundary is present in the root.tsx file

Question

When using Remix v2.8.1, the function useRouteLoaderData can return undefined if an error boundary is present in the root.tsx file

In my project, I have a loader in the root.tsx file and a component called 'Nav' which utilizes the loader data using the useRouteLoaderData hook. For instance,

const data = useRouteLoaderData('root')

as needed.

 <body>
      <Nav/>
      <Layout>{children}</Layout>
      <ScrollRestoration />
      <Scripts />
      <LiveReload />
  </body>

The 'Nav' component is placed in the root because it should be present in all routes, including the error page.

My challenge lies in using the loader data within the 'Nav' component without encountering undefined values. So far, I have attempted using a DefaultErrorBoundary in root.tsx to catch errors, but I still face the issue of the data being undefined within the 'Nav' component.

This is how my root loader function is structured:

export async function loader() {
  return defer(
    {
      navGraphql: await fetchGraphQL(navQuery),
      ENV: {
        STRAPI_URL: process.env.STRAPI_URL,
      },
    },
    {
      headers: { 'Cache-Control': 'public, s-maxage=300' },
    }
  )
}

If you want to take a look at how I've implemented the DefaultErrorBoundary, you can check out the repository here.

I'm currently trying to figure out why the loader data is undefined at the parent level and how I can resolve this issue. Has the approach changed in my remix version? Any suggestions or insights would be greatly appreciated.

typescript remix.run

Answer 1

Answer №1

To resolve the issue, I implemented a global layout file called _main.tsx. This layout file directed all other routes to render accordingly. I also made sure to rename _index.tsx as _main._index.tsx, along with renaming other files in a similar manner.

https://i.sstatic.net/9STJIsKN.png

Within the _main layout, I utilized an Outlet Component from remix to render the remaining routes. I also included an error boundary to handle any errors before reaching the root layout.

Note: It is important to ensure that the loader in your root.tsx file does not generate errors.

import { HeadersFunction } from "@remix-run/node";
import { Outlet } from "@remix-run/react";
import {
    isRouteErrorResponse,
    useRouteError,
} from "@remix-run/react";

export default function MainLayout() {

    return (
        <>
            <Outlet /> // render rest of the routes
        </>
    );
}

export function ErrorBoundary() {
    const error = useRouteError(); //you can use this hook to make the message even more meaningful
    return (
        <main>
            Your Message to the User here
        </main>
    );
}

Answer 2

To resolve the issue, I implemented a global layout file called _main.tsx. This layout file directed all other routes to render accordingly. I also made sure to rename _index.tsx as _main._index.tsx, along with renaming other files in a similar manner.

https://i.sstatic.net/9STJIsKN.png

Within the _main layout, I utilized an Outlet Component from remix to render the remaining routes. I also included an error boundary to handle any errors before reaching the root layout.

Note: It is important to ensure that the loader in your root.tsx file does not generate errors.

import { HeadersFunction } from "@remix-run/node";
import { Outlet } from "@remix-run/react";
import {
    isRouteErrorResponse,
    useRouteError,
} from "@remix-run/react";

export default function MainLayout() {

    return (
        <>
            <Outlet /> // render rest of the routes
        </>
    );
}

export function ErrorBoundary() {
    const error = useRouteError(); //you can use this hook to make the message even more meaningful
    return (
        <main>
            Your Message to the User here
        </main>
    );
}

When using Remix v2.8.1, the function useRouteLoaderData can return undefined if an error boundary is present in the root.tsx file

Answer №1

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