[docs] Warn about using withRoot HOC more than one time per page (#12692

) * [docs] Improve gatsby example giving more details on the HOC component
mui · Aug 28, 2018 · 9fb136f · 9fb136f
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diff --git a/examples/gatsby/README.md b/examples/gatsby/README.md
@@ -19,3 +19,9 @@ npm run develop
 ## The idea behind the example
 
 [Gatsby](https://github.com/gatsbyjs/gatsby) is a static site generator for React.
+
+## `withRoot` usage
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+We are using the `withRoot` higher-order component to accommodate Material-UI's styling solution with Gatsby.
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+⚠️ You should only use a single `withRoot` for rendering one page.