Скачать или смотреть Solving the Image Component Issue in React and Next.js

Discover how to successfully display external image files using the `Image` component in your React and Next.js projects. Follow our step-by-step guide to resolve common issues and improve performance.
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This video is based on the question https://stackoverflow.com/q/70777040/ asked by the user 'Otis' ( https://stackoverflow.com/u/14802753/ ) and on the answer https://stackoverflow.com/a/70777078/ provided by the user 'Mohsen Mahoski' ( https://stackoverflow.com/u/6606524/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Display an External Image File Using an Image Component in React and Next.js

When developing applications with React and Next.js, you may encounter the issue of displaying external images using the built-in Image component. This can often lead to confusion, especially if you find that the image is not appearing as expected when using the Image component as opposed to a standard img tag. Let's break down this problem and walk through the solution step-by-step.

The Problem

You might have worked with external image files in your project before, successfully fetching and displaying them using a simple HTML img tag. For instance, you may use the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

When using the above code, the image displays without any issues. However, when you try to display the same image using the Next.js Image component:

[[See Video to Reveal this Text or Code Snippet]]

The image does not load correctly, and you might instead see the alt text. Instead of your intended image URL, you will see a Next.js URL such as: http://localhost:3000/_next/image?url=http.... This behavior can be frustrating, particularly when the standard img tag worked perfectly.

The Solution

To effectively display external images with the Next.js Image component, you need to follow these key steps:

1. Adding a Custom Loader

Next.js Image component needs a loader to correctly fetch images from external URLs. To add a custom loader, modify your Image component as follows:

[[See Video to Reveal this Text or Code Snippet]]

2. Update next.config.js for Improved Performance

To enhance caching and optimize performance, you also need to allow images from your external server's domain in your next.config.js file. You can do that by adding your server's domain as follows:

[[See Video to Reveal this Text or Code Snippet]]

3. Removing the Loader (Optional)

After you have set up the server's domain in the configuration file, you can return to your Image component and remove the loader option:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following the steps outlined above, you will successfully resolve the issue with displaying external image files using the Next.js Image component. Adding a custom loader, configuring your next.config.js, and understanding how Next.js handles external images will enhance not only the functionality of your application but also its performance. Now you can leverage the powerful features of the Image component in your projects with confidence!