feat(TransitionView): fill parent if parent has definite height (#2629)

packages/core/src/components/TransitionView/TransitionView.tsx

@@ -6,27 +6,31 @@ import { getTestId } from "../../tests/test-ids-utils";
 import { ComponentDefaultTestId } from "../../tests/constants";
 import styles from "./TransitionView.module.scss";
 import SlideTransition from "../SlideTransition/SlideTransition";
+import useMergeRef from "../../hooks/useMergeRef";
 
 const TransitionView = forwardRef(
   (
     { activeStep, direction, height, id, className, "data-testid": dataTestId, children }: TransitionViewProps,
     ref: React.ForwardedRef<HTMLDivElement>
   ) => {
+    const componentRef = useRef<HTMLDivElement>(null);
+    const mergedRef = useMergeRef(ref, componentRef);
     const slideTransitionRef = useRef<HTMLDivElement>(null);
-    const [contentHeight, setContentHeight] = useState<number>(height);
-    const slideTransitionHeight = height || contentHeight > 0 ? "100%" : "auto";
+    const [contentHeight, setContentHeight] = useState<number | "100%">(height);
+    const slideTransitionHeight = height || contentHeight === "100%" || contentHeight > 0 ? "100%" : "auto";
 
     useEffect(() => {
       if (!slideTransitionRef.current) return;
-      setContentHeight(slideTransitionRef.current.scrollHeight);
+      // if parent has definite height, stretch component to fill it, otherwise use content height
+      setContentHeight(componentRef.current.clientHeight > 0 ? "100%" : slideTransitionRef.current.scrollHeight);
     }, [height, slideTransitionRef]);
 
     return (
       <div
         id={id}
         className={cx(styles.slideshow, className)}
         data-testid={dataTestId || getTestId(ComponentDefaultTestId.TRANSITION_VIEW, id)}
-        ref={ref}
+        ref={mergedRef}
         style={{ height: height ?? contentHeight }}
       >
         <AnimatePresence initial={false} custom={direction}>