To create a custom Nuxt.js 500 error page with preloaded state, you can follow these steps:

  1. Create a Custom Error Page Component: First, create a new Vue component that will serve as your custom 500 error page. This component will be displayed when there is a server-side error (HTTP status code 500). You can create a new file named 500.vue in your Nuxt.js project's layouts or pages directory.

    For example, in layouts/500.vue:

    vue
    <template> <div> <h1>500 - Server Error</h1> <p v-if="error">{{ error.message }}</p> <!-- Additional content for the error page --> </div> </template> <script> export default { props: ['error'], async asyncData({ error }) { return { error }; } }; </script>
  2. Configure Nuxt.js to Use the Custom Error Page: Next, you need to tell Nuxt.js to use your custom error page for the 500 error. Open your Nuxt.js configuration file (nuxt.config.js) and add the following:

    javascript
    export default { // Other Nuxt.js config options layout: '500' };

    This sets the default layout to be used for error pages to the custom 500.vue layout.

  3. Handle Server-Side Errors with Middleware: To handle server-side errors and pass the error object to the custom error page, you can use middleware. Create a new file named error.js in the middleware directory of your Nuxt.js project:

    javascript
    export default function ({ error, app }) { if (error) { app.error({ statusCode: 500, message: 'Server Error' }); } }

    This middleware will be called on the server-side when there is an error, and it will trigger the custom error page with the appropriate status code and message.

  4. Preload State in the Custom Error Page: The asyncData method in your custom error page component can be used to preload state or fetch additional data that you want to display on the error page. In the example above, we are passing the error object to the page's props, but you can also use the asyncData method to fetch additional data based on the error, if needed.

With these steps, you have created a custom Nuxt.js 500 error page that will be displayed when there is a server-side error. The page will receive the error object and can preload any necessary state or data before rendering.

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