update migration guide

mui · Apr 23, 2021 · c078faf · c078faf
1 parent 5f6ae1a
commit c078faf
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/docs/src/pages/guides/migration-v4/migration-v4.md b/docs/src/pages/guides/migration-v4/migration-v4.md
@@ -158,6 +158,14 @@ export default function PlainCssPriority() {
  +theme.palette.augmentColor({ color: red, name: 'brand' });
  ```
 
+- The `theme.typography.round` helper was removed because it was no longer used. If you need it, use the function below:
+
+ ```js
+ function round(value) {
+ return Math.round(value * 1e5) / 1e5;
+ }
+ ```
+
 #### Upgrade helper
 
 For a smoother transition, the `adaptV4Theme` helper allows you to iteratively upgrade some of the theme changes to the new theme structure.