Hey everyone! I’m having trouble with a React component I made. It works fine in the original project, but when I try to use it as an NPM module in a new project, it’s not working right.
I added the component’s repo to my package.json and NPM downloads it okay. Webpack puts it in the bundle, but when I run it in the browser, I get this error:
Uncaught Invariant Violation: addComponentAsRefTo(...): Only a
ReactOwner can have refs. You might be adding a ref to a component
that was not created in a component's render method, or you have
multiple copies of React loaded
I’ve tried removing my node_modules folder and reinstalling everything, but nothing has worked so far. The new project declares React as a dependency, while the component library only uses it as a devDependency.
I’m not manually adding refs outside of render functions, so I’m at a loss. Does anyone know how to resolve this issue? Thanks!
hmm, sounds tricky. maybe ur new project has a different react version? try matching the versions. also, check if ur importing the component correctly. sometimes tiny typos can cause weird errors. have u tried console.logging the component to see if it’s actually there? good luck fixing it!
This error often crops up when there is a version mismatch or multiple instances of React in your project. First, ensure that the versions of React in your main project and the component library are compatible by checking the package.json files. It’s important that your component library uses React as a peerDependency instead of a dependency to avoid bundling multiple copies. Additionally, consider explicitly passing the React object during import, which can sometimes help resolve reference issues. I hope this provides useful guidance.
I’ve run into this exact issue before, and it can be a real headache. One thing that worked for me was making sure the component library was using React as a peerDependency instead of a devDependency. This ensures that your main project’s React instance is used.
Also, check if you’re using any HOCs or context providers in your component. Sometimes these can cause issues when used across different React instances. If you are, try wrapping your component in a simple wrapper that doesn’t use these and see if that helps.
Lastly, double-check your build process. Make sure you’re not accidentally bundling React with your component library. This can lead to multiple React instances and cause the error you’re seeing.
It’s a process of elimination, but stick with it. You’ll get there!