Document migration from panels to cards

X-Ref: #17120 for `.panel-default` replacement

diff --git a/docs/migration.md b/docs/migration.md
index 78eca6032bf56b266621a53f801958152465c9f0..9206c803437d965376297cbcc9885c42b0ae0cbf 100644 (file)
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -88,6 +88,20 @@ New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with
 
 Dropped entirely for the new card component.
 
+#### Panels
+
+- `.panel` to `.card`
+- `.panel-default` removed and no replacement
+- `.panel-heading` to `.card-header`
+- `.panel-title` to `.card-title`
+- `.panel-body` to `.card-block`
+- `.panel-footer` to `.card-footer`
+- `.panel-primary` to `.card-primary` and `.card-inverse`
+- `.panel-success` to `.card-success` and `.card-inverse`
+- `.panel-info` to `.card-info` and `.card-inverse`
+- `.panel-warning` to `.card-warning` and `.card-inverse`
+- `.panel-danger` to `.card-danger` and `.card-inverse`
+
 ### Carousel
 
 - Renamed `.item` to `.carousel-item`.