From 7104b14b29f97f310e3b804ed0ab354f76410de5 Mon Sep 17 00:00:00 2001
From: Josh Kelley <joshkel@gmail.com>
Date: Sun, 25 Jul 2021 16:55:48 -0400
Subject: [PATCH] Support Collapse with root and container class keys (#408)

Fixes #394.
---
 src/SnackbarContainer.tsx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/SnackbarContainer.tsx b/src/SnackbarContainer.tsx
index 37e52cc8..a0c6cdf9 100644
--- a/src/SnackbarContainer.tsx
+++ b/src/SnackbarContainer.tsx
@@ -5,8 +5,10 @@ import { SNACKBAR_INDENTS } from './utils/constants';
 import { SnackbarProviderProps } from '.';
 
 const collapse = {
-    container: '& > .MuiCollapse-container',
-    wrapper: '& > .MuiCollapse-container > .MuiCollapse-wrapper',
+    // Material-UI 4.12.x and above uses MuiCollapse-root; earlier versions use
+    // Mui-Collapse-container.  https://github.com/mui-org/material-ui/pull/24084
+    container: '& > .MuiCollapse-container, & > .MuiCollapse-root',
+    wrapper: '& > .MuiCollapse-container > .MuiCollapse-wrapper, & > .MuiCollapse-root > .MuiCollapse-wrapper',
 };
 
 const xsWidthMargin = 16;