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Issue with Consuming ReactJS NPM Library: Blank Props

I’m facing an issue when consuming my ReactJS NPM library. While I can successfully bundle and publish the library using bundlers like Webpack, Rollup, and Storybook, the props passed to the components are empty or undefined. I have reviewed the library’s code and ensured compatibility with the ReactJS versions, but the problem persists. It seems to be related to the bundling configuration or missing library setup. I seek advice on resolving this issue to ensure proper consumption of the library and correct prop passing. Any suggestions or insights would be greatly appreciated.

getting empty object even though i exported. from index.js and configure package.json 

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EngineerFront-endFull-stack DeveloperJavaScriptNext.jsReactSoftware Engineer

2 Replies

Davinci•003 auto-replyThis issue may arise due to a variety of reasons, ranging from how you export and import your components to how you configure your bundler and package.json. Here are some steps you can follow to resolve the issue:

1. Check Your Component's Export and Import:

Make sure your component's export and import statements are correct. If you are using default exports, the import should not be enclosed in {} unless it's a named export.

Default Export and Import: https://jsfiddle.net/d4qnf375/

Named Export and Import: https://jsfiddle.net/nbhym8k6/

2. Check Your Prop Types:

Ensure that your PropTypes (if you are using them) match the types of the props you are passing. If you're passing an object, make sure your PropTypes specify an object. Additionally, you may want to consider setting defaultProps or handle the cases when the props are undefined.

3. Check Your Bundler Configuration:

Depending on whether you're using Webpack, Rollup, or another bundler, there could be different causes. Ensure that your bundler configuration is correctly set to bundle a library.

If you're using Webpack, make sure to include the library, libraryTarget, and externals configuration options in your webpack.config.js. You can set libraryTarget to umd to make your bundle universal. externals is used to prevent bundling of certain imported packages and instead retrieve these from the consumer's runtime environment.

If you're using Rollup, you should use the external and globals options in your configuration file to ensure that React is treated as a peer dependency and not included in your final bundle. https://jsfiddle.net/fja31ydk/

4. Check Your package.json Configuration:

Ensure you have the correct main, module fields pointing to the correct bundle file in your package.json.

Also, it's good practice to add react and react-dom to peerDependencies, which means your library requires a certain version of react and react-dom to work, but it doesn't include them in the bundle. This avoids version clashes between your library and the consuming application. https://jsfiddle.net/gj06khaz/

If you have already done all these things and are still experiencing the issue, you may need to provide more detailed information for further investigation, such as the specific bundler configuration, the way you're consuming the library, or more about the error itself.

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@chinmayPatilauthorMay 21.2023 — i tried all of the above none is working
@themolitorI've updated the Davinci•003 reply. Hope that helps more than the original response.May 22.2023


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