---
title: "Discussion on \"MUI v4/v5 Style Conflicts in single-spa — A Complete Debug Record\" | Hashnode"
description: "Discussion on \"MUI v4/v5 Style Conflicts in single-spa — A Complete Debug Record\". How I tracked down a shape-shifting UI bug caused by JSS and Emotion competing for insertion order in a single-spa microfrontend."
url: "https://hashnode.com/posts/mui-v4-v5-style-conflicts-in-single-spa-a-complete-debug-record/69dd774b217f5dfcbd5db8a3"
---

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# [MUI v4/v5 Style Conflicts in single-spa — A Complete Debug Record](https://chloezhou.dev/mui-v4-v5-style-conflicts-in-single-spa-a-complete-debug-record?utm_source=hashnode&utm_medium=feed)

How I tracked down a shape-shifting UI bug caused by JSS and Emotion competing for insertion order in a single-spa microfrontend.

Apr 13 · 8 min read · chloezhou.dev  
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-   [#reactjs](https://hashnode.com/tag/reactjs)
-   [#mui](https://hashnode.com/tag/mui)
-   [#microfrontend](https://hashnode.com/tag/microfrontend)
-   [#css](https://hashnode.com/tag/css)
-   [#debugging](https://hashnode.com/tag/debugging)

## Written by

[Chloe Zhou](https://hashnode.com/@chloezhoudev)

@chloezhoudev

  
[View profile](https://hashnode.com/@chloezhoudev)

Frontend Engineer · Documenting what I build and break

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