Resolving TypeError in Vue 2 Projects Using Webpack Module Federation

Discover how to fix the `TypeError: Cannot read property 'includes' of undefined` when using Vue 2 with `Webpack Module Federation`. Learn the essential steps to update your project and resolve the issue effectively!
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Resolving TypeError in Vue 2 Projects Using Webpack Module Federation

Creating projects with Vue can sometimes present challenges, especially when you're trying to utilize powerful features like Webpack's Module Federation. If you're encountering the dreaded TypeError: Cannot read property 'includes' of undefined, worry not! In this guide, we'll break down the issue and guide you through the solution step-by-step.

Understanding the Problem

You have two Vue 2 projects set up with the vue-cli, and you’re trying to implement Webpack Module Federation. You have configured the projects with the necessary files, but as you're building your project, you encounter the following error message:

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

This error is typically associated with an incompatibility between versions of Webpack and Vue CLI. Specifically, the issue arises because the version of Webpack that Vue CLI 4 ships with is not compatible with the latest features of Module Federation, which requires Webpack 5.

The Solution: Upgrade Vue CLI

To resolve this issue, you'll need to upgrade your Vue CLI to version 5.x.x. The latest version utilizes Webpack 5, which supports the features necessary for Module Federation. Below are the clear steps on how to do this.

Step 1: Update Vue CLI

Replace the existing dependencies related to Vue CLI with the following code snippet to ensure they are updated to version 5.x.x:

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

Step 2: Install Dependencies

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

This command will install the updated versions of Vue CLI and its plugins.

Step 3: Build Your Project Again

Once the installation is complete, try building your project again with:

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

This command should now work without throwing the previous error, and your Vue application should be running successfully with Module Federation capabilities.

Conclusion

In summary, the error you encountered when trying to build your Vue project with Webpack Module Federation is due to a version mismatch between Vue CLI and Webpack. Upgrading to Vue CLI version 5 is essential for full compatibility with Webpack 5 and its new features. By following the steps detailed above, you can resolve the issue and continue developing your applications smoothly.

If you find this guide helpful or encounter any more issues, feel free to leave a comment below. Happy coding!