How to Fix Jest Parse Error After Adding react-photoswipe-gallery in a React TypeScript Project

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Learn how to resolve the Jest parse error that occurs after integrating `react-photoswipe-gallery` into your React TypeScript project.
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How to Fix Jest Parse Error After Adding react-photoswipe-gallery in a React TypeScript Project

When integrating react-photoswipe-gallery into a React TypeScript project, you might encounter a parse error from Jest. Jest is a delightful JavaScript testing framework with a focus on simplicity. However, sometimes integrating new libraries can cause issues due to mismatched configurations.

Understanding the Problem

After adding react-photoswipe-gallery to your project, you may see an error message like this when running your tests:

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

This issue arises because Jest might not be able to handle some of the syntax or module formats used in react-photoswipe-gallery.

Steps to Fix the Issue

Here are the steps to resolve the Jest parse error:

Install Babel Jest:
Make sure you have babel-jest installed in your project. You can add it by running:

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

Update Jest Configuration:
Modify your jest.config.js or jest.config.ts file to include Babel for transforming JavaScript files. Add the transform property to your Jest configuration:

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

Create a Babel Configuration:
Create or update the .babelrc or babel.config.js file to ensure Jest uses Babel to process the files:

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

Restart Your Test Runner:
After making these changes, restart your test runner to ensure that the new configurations are picked up.

By following these steps, Jest should now be able to parse the files correctly, and you will be able to continue running your tests without encountering errors related to the react-photoswipe-gallery integration.

Conclusion

Integrating third-party libraries into a React TypeScript project can sometimes result in unexpected issues, such as Jest parse errors. However, with proper configuration adjustments to your Jest and Babel settings, you can quickly resolve these errors and get back to developing and testing your application efficiently.



If you find this guide helpful, make sure to share it with other developers facing similar issues. Good luck with your project!

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