Walking back, the wall's words came back at once over the wrong shoes: wait until the camera is nearly home

import { useEffect, useState } from "react";
declare function whileVisible(ms: number, then: () => void): () => void;
// before: the wall's words faded back on close, over 0.22 s, with the camera still close in
export function useWordsWaitForHome(room: { close: () => void }) {
  const [returning, setReturning] = useState(false);
  const close = () => {
    setReturning(true);
    room.close(); // the room's walk back calls onHome at u = 0.82 of its 840 ms
  };
  const onHome = () => setReturning(false); // passed to the room's events
  // If the word never comes: whileVisible, from the lesson on the panel's cue below, counts only while visible.
  useEffect(() => (returning ? whileVisible(1500, () => setReturning(false)) : undefined), [returning]);
  return { returning, close, onHome }; // <div className="fl-body" data-return={returning || undefined}>
}

.fl-body[data-focus] .fl-plane,
.fl-body[data-return] .fl-plane {
  opacity: 0;
}