fix: auto hegiht for textarea

src/textarea.tsx

@@ -0,0 +1,8 @@
+export const autoHeight = (event: any) => {
+  event.target.style.height = "auto";
+  // max 70% of screen height
+  event.target.style.height = `${Math.min(
+    event.target.scrollHeight,
+    window.innerHeight * 0.7
+  )}px`;
+};