Add Portal file

src/Portal.tsx

@@ -0,0 +1,23 @@
+import { useEffect } from 'react'
+import { createPortal } from 'react-dom'
+
+const Portal = ({ children }) => {
+    let modalRoot = document.getElementById('modal')
+
+    if (!modalRoot) {
+        modalRoot = document.createElement('div')
+        modalRoot.setAttribute('id', 'modal')
+        document.body.appendChild(modalRoot)
+    }
+
+    const modalElement = document.createElement('div')
+    
+    useEffect(() => {
+        modalRoot.appendChild(modalElement)
+        return () => modalRoot.removeChild(modalElement)
+    })
+
+    return createPortal(children, modalElement)
+}
+
+export default Portal