added migration guide

mui · Dec 16, 2020 · d764665 · d764665
1 parent c42898f
commit d764665
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diff --git a/docs/src/pages/guides/migration-v4/migration-v4.md b/docs/src/pages/guides/migration-v4/migration-v4.md
@@ -230,6 +230,12 @@ const classes = makeStyles(theme => ({
 }));
 ```
 
+### Core components
+
+As the core components use emotion as a styled engine, the props used by emotion are not intercepted. The prop `as` in the following codesnippet will not be propagated to the `SomeOtherComponent`.
+
+`<MuiComponent component={SomeOtherComponent} as="button" />`
+
 ### AppBar
 
 - [AppBar] Remove z-index when position static and relative