Clarify the necessary `data-target`/`href` attribute for carousel controls (#25690)

diff --git a/docs/4.0/components/carousel.md b/docs/4.0/components/carousel.md
index 0a2a5dcbfa275110ae1c085a021f7fa46d66f5eb..db3e0617a013cf74efac458d10373234490692d6 100644 (file)
--- a/docs/4.0/components/carousel.md
+++ b/docs/4.0/components/carousel.md
@@ -20,7 +20,7 @@ Lastly, if you're building our JavaScript from source, it [requires `util.js`]({
 
 Carousels don't automatically normalize slide dimensions. As such, you may need to use additional utilities or custom styles to appropriately size content. While carousels support previous/next controls and indicators, they're not explicitly required. Add and customize as you see fit.
 
-**The `.active` class needs to be added to one of the slides** otherwise the carousel will not be visible. Also be sure to set a unique id on the `.carousel` for optional controls, especially if you're using multiple carousels on a single page.
+**The `.active` class needs to be added to one of the slides** otherwise the carousel will not be visible. Also be sure to set a unique id on the `.carousel` for optional controls, especially if you're using multiple carousels on a single page. Control and indicator elements must have a `data-target` attribute (or `href` for links) that matches the id of the `.carousel` element.
 
 ### Slides only