Скачать или смотреть Customizable Image Names in Gatsby with GraphQL

Learn how to implement `customizable image names` in your Gatsby app using GraphQL queries. Enhance your components with simple techniques to load different images based on props.
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This video is based on the question https://stackoverflow.com/q/56118471/ asked by the user 'Baboo' ( https://stackoverflow.com/u/6325822/ ) and on the answer https://stackoverflow.com/a/63540321/ provided by the user 'ramzesenok' ( https://stackoverflow.com/u/6898849/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction to Customizing Image Names in Gatsby

If you're working with Gatsby and its GraphQL query system, you might find yourself needing to customize certain aspects of your components. A common requirement, especially when displaying images, is to dynamically alter the image's filename. This problem becomes especially relevant when you want a reusable component to fetch different images based on props. In this guide, we'll explore how to accomplish this with a straightforward solution.

Understanding the Problem

You have a working component named Image that fetches and displays a specific image (for example, gatsby-astronaut.png). However, you want to make it more versatile by allowing the image filename to be passed as a prop. Here's the catch: trying to interpolate the variable directly into the GraphQL query leads to an error.

Here’s the original attempt to accomplish this:

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This approach leads to an error: Expected 1 arguments, but got 2.ts(2554). So, what’s the way around this?

Solution: Using useStaticQuery for Custom Images

The best way to customize image fetching in Gatsby is to leverage the useStaticQuery hook instead of the StaticQuery component. By gathering your images in one GraphQL query and dynamically selecting the appropriate image based on props, you'll avoid interpolation issues and keep your code clean and efficient.

Step-by-Step Implementation

Here's how to achieve this step by step:

1. Use useStaticQuery

Replace the StaticQuery component with useStaticQuery. This allows you to run a single query that fetches multiple images at once.

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2. Define Logic for Selecting Images

Using a switch case, determine which image to return based on the passed name prop.

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3. Usage Example

You can now use the component like this:

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4. Making It Typo-Safe

To further enhance your implementation and avoid typos, consider creating an object that holds the image names. This allows you to access image names in a more organized manner:

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Then, in your switch case, reference the Images object:

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Conclusion

By following the steps outlined above, you can create a flexible and reusable image component in Gatsby that allows for customizable image names. This technique not only enhances your component's functionality but also keeps your code clean and maintainable. Embrace this method in your projects to make the most of Gatsby's powerful GraphQL capabilities.

Happy coding!