List out what's supported in validation styles

Fixes #27169

diff --git a/site/docs/4.1/components/forms.md b/site/docs/4.1/components/forms.md
index c47606647f7b943d9c20ca40ad1984efd28b3f75..0026d33263c821ccb02fdad03984e516398ac3f6 100644 (file)
--- a/site/docs/4.1/components/forms.md
+++ b/site/docs/4.1/components/forms.md
@@ -992,7 +992,13 @@ We recommend using client-side validation, but in case you require server-side v
 
 ### Supported elements
 
-Our example forms show native textual `<input>`s above, but form validation styles are also available for `<textarea>`s and custom form controls.
+Validation styles are available for the following form controls and components:
+
+- `<input>`s and `<textarea>`s with `.form-control` (including up to one `.form-control` in input groups)
+- `<select>`s with `.form-select` or `.custom-select`
+- `.form-check`s
+- `.custom-checkbox`s and `.custom-radio`s
+- `.custom-file`
 
 {% capture example %}
 <form class="was-validated">