refactor: summary

src/components/collapse-container/headless-collapse.tsx

@@ -0,0 +1,57 @@
+import React, { useEffect, useRef, useState } from 'react';
+
+interface CollapseProps {
+  open: boolean;
+  children: React.ReactNode;
+  duration?: number;
+  minHeight?: number;
+}
+
+export default function Collapse({
+  open,
+  children,
+  minHeight = 0,
+  duration = 200
+}: CollapseProps) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [height, setHeight] = useState<number | 'auto'>(minHeight);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+
+    if (open) {
+      const h = el.scrollHeight;
+      setHeight(h);
+
+      const timer = setTimeout(() => {
+        setHeight('auto');
+      }, duration);
+
+      return () => clearTimeout(timer);
+    } else {
+      const h = el.scrollHeight;
+      setHeight(h);
+
+      requestAnimationFrame(() => {
+        requestAnimationFrame(() => {
+          setHeight(0);
+        });
+      });
+    }
+    return undefined;
+  }, [open, duration]);
+
+  return (
+    <div
+      ref={ref}
+      style={{
+        height,
+        overflow: 'hidden',
+        transition: `height ${duration}ms ease`
+      }}
+    >
+      {children}
+    </div>
+  );
+}