Troubleshooting: Issues with Custom Image Loader in Next.js Export

I'm encountering a problem while attempting to build and export my Next.JS project. The issue lies with Image Optimization error during the export process.

To address this, I have developed a custom loader by creating a file /services/imageLoader.js containing the following code:

export default function LocalImageLoader({src, width, quality}) {
    var fileName = src.split("/").pop();
    return `./_next/static/media/${fileName}`;
}

In all pages where I utilize the next/image component, I have included the loader attribute, pointing to my LocalImageLoader function like so:

import LocalImageLoader from '../services/imageLoader';
import logoImage from '../resources/images/logo.png';

// more code followed by
<Image loader={LocalImageLoader} src={logoImage} alt="Logo" className="img-fluid" />
// yet more code here

However, when running npm run export (configured in package.json as next build && next export), I encounter the subsequent error message:

Error: Image Optimization using Next.js' default loader is not compatible with `next export`.
  Possible solutions:
    - Use `next start` to run a server, which includes the Image Optimization API.
    - Utilize a provider that supports Image Optimization (e.g., Vercel).
    - Configure a third-party loader in `next.config.js`.
    - Apply the `loader` prop for `next/image`.
  Read more: https://nextjs.org/docs/messages/export-image-api
    at /home/raphael/Projects/Next/learning/testProject/node_modules/next/dist/export/index.js:256:23
    at async Span.traceAsyncFn (/home/raphael/Projects/Next/learning/testProject/node_modules/next/dist/trace/trace.js:74:20)

If anyone can help me identify what I might be doing incorrectly, I would greatly appreciate it!

Thank you!

Answer №1

Don't forget to include your unique loader in next.config.js. Make sure to follow the example provided below. If you encounter any issues, remember that there are alternative loaders available since the default loader may not work during export.

module.exports = {
  images: {
    loader: 'custom',
    path: 'https://example.com/myaccount/',
  },
}

For more information, visit: https://nextjs.org/docs/api-reference/next/image#loader-configuration

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