06進捗バーと停止ボタンつき自動スライドショー

<main class="stage">
<div class="ap" id="ap">
  <div class="ap__view" id="view" role="region" aria-roledescription="carousel" aria-label="店内案内の自動スライドショー" tabindex="0">
    <div class="ap__track" id="track">
      <div class="ap__shot" role="group" aria-roledescription="slide" aria-label="4枚中1枚目">
        <span class="ap__photo ap__photo--bread" role="img" aria-label="オーブンから出したばかりのパンが並ぶ陳列棚"></span>
        <span class="ap__cap">焼きたてパン</span>
      </div>
      <div class="ap__shot" role="group" aria-roledescription="slide" aria-label="4枚中2枚目">
        <span class="ap__photo ap__photo--window" role="img" aria-label="日が差す窓際の席と木のテーブル"></span>
        <span class="ap__cap">窓際の席</span>
      </div>
      <div class="ap__shot" role="group" aria-roledescription="slide" aria-label="4枚中3枚目">
        <span class="ap__photo ap__photo--drink" role="img" aria-label="氷と果物を入れた夏の飲み物2杯"></span>
        <span class="ap__cap">夏の飲み物</span>
      </div>
      <div class="ap__shot" role="group" aria-roledescription="slide" aria-label="4枚中4枚目">
        <span class="ap__photo ap__photo--plant" role="img" aria-label="店の入口に並べられた緑の鉢植え"></span>
        <span class="ap__cap">入口の鉢植え</span>
      </div>
    </div>
  </div>
  <div class="ap__bar">
    <button class="ap__toggle" type="button" id="toggle" aria-label="自動再生を停止">
      <span class="ap__ico ap__ico--pause"><svg viewBox="0 0 256 256" width="1em" height="1em" aria-hidden="true" focusable="false"><path d="M200,32H160a16,16,0,0,0-16,16V208a16,16,0,0,0,16,16h40a16,16,0,0,0,16-16V48A16,16,0,0,0,200,32Zm0,176H160V48h40ZM96,32H56A16,16,0,0,0,40,48V208a16,16,0,0,0,16,16H96a16,16,0,0,0,16-16V48A16,16,0,0,0,96,32Zm0,176H56V48H96Z" fill="currentColor"/></svg></span>
      <span class="ap__ico ap__ico--play"><svg viewBox="0 0 256 256" width="1em" height="1em" aria-hidden="true" focusable="false"><path d="M232.4,114.49,88.32,26.35a16,16,0,0,0-16.2-.3A15.86,15.86,0,0,0,64,39.87V216.13A15.94,15.94,0,0,0,80,232a16.07,16.07,0,0,0,8.36-2.35L232.4,141.51a15.81,15.81,0,0,0,0-27ZM80,215.94V40l143.83,88Z" fill="currentColor"/></svg></span>
    </button>
    <span class="ap__meter"><span class="ap__fill" id="fill"></span></span>
    <span class="ap__count" id="count" aria-hidden="true">1 / 4</span>
  </div>
  <span class="ap__dots" role="group" aria-label="スライドを選ぶ">
    <button class="ap__dot" type="button" data-go="0" aria-label="1枚目" aria-current="true"></button>
    <button class="ap__dot" type="button" data-go="1" aria-label="2枚目" aria-current="false"></button>
    <button class="ap__dot" type="button" data-go="2" aria-label="3枚目" aria-current="false"></button>
    <button class="ap__dot" type="button" data-go="3" aria-label="4枚目" aria-current="false"></button>
  </span>
</div>
</main>

@use "../../../../site/static/demo-tokens" as *;

// 진행 막대와 멈춤 단추가 있는 자동 슬라이드쇼.
// 타이머는 JS 하나뿐이고 화면의 두 가지(장 넘김·남은 시간)가 그 타이머 하나를 함께 본다.
// 남은 시간은 막대의 scaleX 로만 그린다 — width 를 줄이면 매 프레임 레이아웃을 다시 재고,
// transform-origin: left 가 없으면 막대가 가운데에서 양쪽으로 빨려 들어간다.
// 멈춤 단추와 visibilitychange 가 같은 타이머를 세우므로 탭을 떠나면 사진이 혼자 넘어가지 않는다.

$duration: $dur-quick;
$easing: $ease-spring;
$color: $subject-blue-deep;
$line: rgba($subject-ink, .22);

@include stage($stage-yellow);

.ap {
  display: flex; flex-direction: column; gap: $sp-2;
  box-sizing: border-box; width: min(100%, 400px);
}

.ap__view {
  position: relative;
  height: clamp(92px, 32vw, 148px);
  border-radius: $r-card; overflow: hidden;
  background: $subject-ink;
}
.ap__view:focus-visible { outline: 2px solid $color; outline-offset: 2px; }

.ap__track {
  --i: 0;
  display: flex; height: 100%;
  transform: translateX(calc(var(--i) * -100%));
  transition: transform $duration $easing;
  will-change: transform;
}
.ap__shot { position: relative; flex: 0 0 100%; }

// ── 사진 자리 (FLUX 대기 중 — 지금은 토큰 팔레트로 합성한 장면 그라디언트)
.ap__photo { position: absolute; inset: 0; display: block; }
.ap__photo--bread {
  background:
    linear-gradient(to bottom, rgba($subject-ink, 0) 64%, rgba($subject-ink, .50) 64.6%, rgba($subject-ink, .66)),
    repeating-linear-gradient(94deg, rgba($stage-yellow, .30) 0 14px, rgba($stage-yellow, 0) 14px 42px),
    radial-gradient(34% 30% at 68% 30%, rgba($stage-yellow, .82), rgba($stage-yellow, 0) 74%),
    linear-gradient(162deg, $subject-orange-deep 4%, $stage-orange 98%);
}
.ap__photo--window {
  background:
    linear-gradient(112deg, rgba($stage-paper, .62) 0 18%, rgba($stage-paper, 0) 46%),
    radial-gradient(40% 36% at 30% 22%, rgba($stage-yellow, .70), rgba($stage-yellow, 0) 76%),
    linear-gradient(158deg, $subject-cream 6%, $subject-lilac 98%);
}
.ap__photo--drink {
  background:
    radial-gradient(24% 30% at 38% 54%, rgba($stage-paper, .58), rgba($stage-paper, 0) 74%),
    radial-gradient(24% 30% at 62% 44%, rgba($stage-paper, .48), rgba($stage-paper, 0) 74%),
    linear-gradient(170deg, $subject-sky 4%, $chart-3 98%);
}
.ap__photo--plant {
  background:
    linear-gradient(to top, rgba($subject-ink, .40), rgba($subject-ink, 0) 48%),
    radial-gradient(30% 44% at 24% 66%, rgba($subject-mint, .78), rgba($subject-mint, 0) 76%),
    linear-gradient(166deg, $chart-3 8%, $subject-mint 96%);
}

.ap__cap {
  position: absolute; left: $sp-3; bottom: $sp-3;
  padding: $sp-1 $sp-3; border-radius: $r-pill;
  background: $color; color: $subject-cream;
  font-weight: 700; font-size: clamp(11px, 3vw, 13px); line-height: 1.5;
  white-space: nowrap;
}

// ── 남은 시간 줄
.ap__bar { display: flex; align-items: center; gap: $sp-2; }
.ap__toggle {
  display: grid; place-items: center;
  width: 28px; height: 28px; padding: 0;
  border: 1px solid $line; border-radius: $r-pill;
  background: $stage-paper; color: $subject-ink;
  font-size: 13px; cursor: pointer;
  transition: transform $duration $easing;
}
.ap__toggle:hover { transform: scale(1.08); }
.ap__toggle:active { transform: scale(.94); }
.ap__toggle:focus-visible { outline: 2px solid $color; outline-offset: 2px; }
.ap__ico { display: grid; place-items: center; }
.ap__ico--play { display: none; }
.ap.is-paused .ap__ico--pause { display: none; }
.ap.is-paused .ap__ico--play { display: grid; }

.ap__meter {
  flex: 1 1 auto; min-width: 0;
  height: 6px; border-radius: $r-pill; overflow: hidden;
  background: rgba($subject-ink, .22);
}
.ap__fill {
  --p: 1;
  display: block; width: 100%; height: 100%;
  border-radius: $r-pill;
  background: $color;
  transform: scaleX(var(--p));
  transform-origin: left;
}
.ap__count {
  flex: 0 0 auto;
  color: $subject-ink;
  font-weight: 700; font-size: clamp(10px, 2.6vw, 12px); line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

.ap__dots { display: flex; align-items: center; justify-content: center; gap: $sp-2; }
.ap__dot {
  width: 8px; height: 8px; padding: 0;
  border: 0; border-radius: 50%;
  background: rgba($subject-ink, .30);
  cursor: pointer;
  transition: transform $duration $easing, background-color $duration $easing;
}
.ap__dot[aria-current="true"] { background: $color; transform: scale(1.5); }
.ap__dot:focus-visible { outline: 2px solid $color; outline-offset: 2px; }

// ── 좁은 화면: 남은 시간 줄만 남기고 나머지를 줄인다
@media (max-width: 340px) {
  .ap__cap { left: $sp-2; bottom: $sp-2; padding: 0 $sp-2; }
  .ap__toggle { width: 24px; height: 24px; font-size: 11px; }
  .ap__count { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ap__track, .ap__toggle, .ap__dot { transition: none; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.ap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-sizing: border-box;
  width: min(100%, 400px);
}

.ap__view {
  position: relative;
  height: clamp(92px, 32vw, 148px);
  border-radius: 16px;
  overflow: hidden;
  background: #17141a;
}

.ap__view:focus-visible {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
}

.ap__track {
  --i: 0;
  display: flex;
  height: 100%;
  transform: translateX(calc(var(--i) * -100%));
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

.ap__shot {
  position: relative;
  flex: 0 0 100%;
}

.ap__photo {
  position: absolute;
  inset: 0;
  display: block;
}

.ap__photo--bread {
  background: linear-gradient(to bottom, rgba(23, 20, 26, 0) 64%, rgba(23, 20, 26, 0.5) 64.6%, rgba(23, 20, 26, 0.66)), repeating-linear-gradient(94deg, rgba(255, 210, 63, 0.3) 0 14px, rgba(255, 210, 63, 0) 14px 42px), radial-gradient(34% 30% at 68% 30%, rgba(255, 210, 63, 0.82), rgba(255, 210, 63, 0) 74%), linear-gradient(162deg, #c93000 4%, #ff4d1f 98%);
}

.ap__photo--window {
  background: linear-gradient(112deg, rgba(255, 255, 255, 0.62) 0 18%, rgba(255, 255, 255, 0) 46%), radial-gradient(40% 36% at 30% 22%, rgba(255, 210, 63, 0.7), rgba(255, 210, 63, 0) 76%), linear-gradient(158deg, #fff7e6 6%, #b9a0ff 98%);
}

.ap__photo--drink {
  background: radial-gradient(24% 30% at 38% 54%, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0) 74%), radial-gradient(24% 30% at 62% 44%, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0) 74%), linear-gradient(170deg, #6ec8ff 4%, #2b9d74 98%);
}

.ap__photo--plant {
  background: linear-gradient(to top, rgba(23, 20, 26, 0.4), rgba(23, 20, 26, 0) 48%), radial-gradient(30% 44% at 24% 66%, rgba(76, 212, 166, 0.78), rgba(76, 212, 166, 0) 76%), linear-gradient(166deg, #2b9d74 8%, #4cd4a6 96%);
}

.ap__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(11px, 3vw, 13px);
  line-height: 1.5;
  white-space: nowrap;
}

.ap__bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ap__toggle {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid rgba(23, 20, 26, 0.22);
  border-radius: 999px;
  background: #ffffff;
  color: #17141a;
  font-size: 13px;
  cursor: pointer;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ap__toggle:hover {
  transform: scale(1.08);
}

.ap__toggle:active {
  transform: scale(0.94);
}

.ap__toggle:focus-visible {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
}

.ap__ico {
  display: grid;
  place-items: center;
}

.ap__ico--play {
  display: none;
}

.ap.is-paused .ap__ico--pause {
  display: none;
}

.ap.is-paused .ap__ico--play {
  display: grid;
}

.ap__meter {
  flex: 1 1 auto;
  min-width: 0;
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(23, 20, 26, 0.22);
}

.ap__fill {
  --p: 1;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: #0a4fe8;
  transform: scaleX(var(--p));
  transform-origin: left;
}

.ap__count {
  flex: 0 0 auto;
  color: #17141a;
  font-weight: 700;
  font-size: clamp(10px, 2.6vw, 12px);
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

.ap__dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.ap__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.3);
  cursor: pointer;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1), background-color 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ap__dot[aria-current=true] {
  background: #0a4fe8;
  transform: scale(1.5);
}

.ap__dot:focus-visible {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
}

@media (max-width: 340px) {
  .ap__cap {
    left: 8px;
    bottom: 8px;
    padding: 0 8px;
  }
  .ap__toggle {
    width: 24px;
    height: 24px;
    font-size: 11px;
  }
  .ap__count {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ap__track, .ap__toggle, .ap__dot {
    transition: none;
  }
}

var root = document.getElementById('ap');
var track = document.getElementById('track');
var fill = document.getElementById('fill');
var toggle = document.getElementById('toggle');
var count = document.getElementById('count');
var dots = Array.prototype.slice.call(root.querySelectorAll('.ap__dot'));
var PAUSE_LABEL = '自動再生を停止';
var PLAY_LABEL = '自動再生を開始';
var HOLD = 1200;
var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
var index = 0, playing = false, wanted = !reduce, startAt = 0, remain = HOLD, raf = 0;
function show(next) {
  index = (next + dots.length) % dots.length;
  track.style.setProperty('--i', index);
  count.textContent = (index + 1) + ' / ' + dots.length;
  dots.forEach(function (dot, i) { dot.setAttribute('aria-current', i === index ? 'true' : 'false'); });
}
// 남은 시간은 막대 하나의 scaleX 로만 나타난다 — 폭을 줄이면 매 프레임 레이아웃을 다시 잰다
function frame(now) {
  var passed = Math.min(1, (now - startAt) / HOLD);
  fill.style.setProperty('--p', (1 - passed).toFixed(3));
  if (passed >= 1) { startAt = now; show(index + 1); }
  raf = requestAnimationFrame(frame);
}
function play() {
  if (playing) { return; }
  playing = true;
  startAt = performance.now() - (HOLD - remain);
  root.classList.remove('is-paused');
  toggle.setAttribute('aria-label', PAUSE_LABEL);
  raf = requestAnimationFrame(frame);
}
function pause() {
  if (!playing) { return; }
  playing = false;
  remain = Math.max(0, HOLD - (performance.now() - startAt));
  cancelAnimationFrame(raf);
  root.classList.add('is-paused');
  toggle.setAttribute('aria-label', PLAY_LABEL);
}
toggle.addEventListener('click', function () {
  wanted = !wanted;
  if (wanted) { remain = HOLD; play(); } else { pause(); }
});
root.addEventListener('click', function (e) {
  var dot = e.target.closest('[data-go]');
  if (!dot) { return; }
  show(Number(dot.getAttribute('data-go')));
  remain = HOLD;
  startAt = performance.now();
  fill.style.setProperty('--p', '1');
});
// 탭을 떠나 있는 동안 사진이 혼자 넘어가면 돌아왔을 때 어디였는지 알 수 없다
document.addEventListener('visibilitychange', function () {
  if (document.hidden) { pause(); } else if (wanted) { play(); }
});
// 움직임을 줄이라는 설정이면 자동재생을 아예 시작하지 않는다 (WCAG 2.2.2)
if (wanted) { play(); } else {
  root.classList.add('is-paused');
  toggle.setAttribute('aria-label', PLAY_LABEL);
}

// AutoplayProgressSlider — vanilla 판(run/082/demo/06-slider-autoplay-progress-pause/index.html) 의 React 포트.
// 타이머는 하나뿐이고 장 넘김과 남은 시간 막대가 그 타이머를 함께 본다.
// 멈춤 단추와 visibilitychange 가 같은 타이머를 세우고, 움직임을 줄이라는 설정이면
// 자동재생을 아예 시작하지 않는다 (WCAG 2.2.2) — vanilla 와 같은 규칙이다.
import { useEffect, useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./AutoplayProgressSlider.module.scss";

export type AutoplayProgressSliderProps = {
  duration?: number;
  easing?: string;
  color?: string;
  hold?: number;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type TrackVars = CSSProperties & { "--i"?: number };
type FillVars = CSSProperties & { "--p"?: number };
type Box<T> = { current: T | null };

type Shot = { tone: string; cap: string; alt: string; slide: string; dot: string };

const REGION = "매장 안내 자동 슬라이드쇼";
const PAUSE_LABEL = "자동재생 멈춤";
const PLAY_LABEL = "자동재생 시작";
const DOTS_LABEL = "장 고르기";
const SHOTS: Shot[] = [
  { tone: "bread", cap: "갓 구운 빵", alt: "오븐에서 막 꺼낸 빵이 진열대에 놓인 장면", slide: "4장 중 1장", dot: "1번째 장" },
  { tone: "window", cap: "창가 자리", alt: "햇살이 드는 창가 자리와 나무 탁자", slide: "4장 중 2장", dot: "2번째 장" },
  { tone: "drink", cap: "여름 음료", alt: "얼음과 과일을 담은 여름 음료 두 잔", slide: "4장 중 3장", dot: "3번째 장" },
  { tone: "plant", cap: "문 앞 화분", alt: "가게 문 앞에 나란히 놓인 초록 화분들", slide: "4장 중 4장", dot: "4번째 장" },
];

export default function AutoplayProgressSlider(props: AutoplayProgressSliderProps) {
  const duration = props.duration ?? 220;
  const easing = props.easing ?? "cubic-bezier(.2, .8, .2, 1)";
  const color = props.color ?? "#0a4fe8";
  const hold = props.hold ?? 1200;
  const reduce = typeof window === "undefined" ? false : window.matchMedia("(prefers-reduced-motion: reduce)").matches;
  const [index, setIndex] = useState<number>(0);
  const [playing, setPlaying] = useState<boolean>(!reduce);
  const [left, setLeft] = useState<number>(1);
  const startRef = useRef<number>(0) as Box<number>;
  const leftRef = useRef<number>(1) as Box<number>;

  // 남은 비율 하나를 rAF 가 계속 고쳐 쓰고, 0 이 되는 순간 다음 장으로 넘긴다
  useEffect(() => {
    if (!playing) { return; }
    const total = hold * (leftRef.current ?? 1);
    startRef.current = performance.now();
    let raf = 0;
    const frame = (now: number) => {
      const passed = Math.min(1, (now - (startRef.current ?? now)) / total);
      const rest = 1 - passed;
      leftRef.current = rest;
      setLeft(rest);
      if (passed >= 1) {
        leftRef.current = 1;
        setIndex((prev: number) => (prev + 1) % SHOTS.length);
        startRef.current = now;
      }
      raf = requestAnimationFrame(frame);
    };
    raf = requestAnimationFrame(frame);
    return () => cancelAnimationFrame(raf);
  }, [playing, hold, index]);

  // 탭을 떠나 있는 동안 사진이 혼자 넘어가면 돌아왔을 때 어디였는지 알 수 없다
  useEffect(() => {
    const onVisibility = () => {
      if (document.hidden) { setPlaying(false); } else if (!reduce) { setPlaying(true); }
    };
    document.addEventListener("visibilitychange", onVisibility);
    return () => document.removeEventListener("visibilitychange", onVisibility);
  }, [reduce]);

  const jump = (next: number) => {
    leftRef.current = 1;
    setLeft(1);
    setIndex((next + SHOTS.length) % SHOTS.length);
  };

  const vars: Vars = { "--duration": duration + "ms", "--easing": easing, "--color": color };
  const trackVars: TrackVars = { "--i": index };
  const fillVars: FillVars = { "--p": left };

  return (
    <main className={styles.stage}>
      <div className={styles.root + (playing ? "" : " " + styles.isPaused)} style={vars}>
        <div className={styles.view} role="region" aria-roledescription="carousel" aria-label={REGION} tabIndex={0}>
          <div className={styles.track} style={trackVars}>
            {SHOTS.map((shot) => (
              <div key={shot.tone} className={styles.shot} role="group" aria-roledescription="slide" aria-label={shot.slide}>
                <span className={styles.photo + " " + styles["photo--" + shot.tone]} role="img" aria-label={shot.alt} />
                <span className={styles.cap}>{shot.cap}</span>
              </div>
            ))}
          </div>
        </div>
        <div className={styles.bar}>
          <button
            className={styles.toggle}
            type="button"
            aria-label={playing ? PAUSE_LABEL : PLAY_LABEL}
            onClick={() => {
              if (playing) { setPlaying(false); } else { leftRef.current = 1; setLeft(1); setPlaying(true); }
            }}
          >
            <span className={styles.ico + " " + styles["ico--pause"]}>
              <svg viewBox="0 0 256 256" width="1em" height="1em" aria-hidden="true" focusable="false">
                <path d="M200,32H160a16,16,0,0,0-16,16V208a16,16,0,0,0,16,16h40a16,16,0,0,0,16-16V48A16,16,0,0,0,200,32Zm0,176H160V48h40ZM96,32H56A16,16,0,0,0,40,48V208a16,16,0,0,0,16,16H96a16,16,0,0,0,16-16V48A16,16,0,0,0,96,32Zm0,176H56V48H96Z" fill="currentColor" />
              </svg>
            </span>
            <span className={styles.ico + " " + styles["ico--play"]}>
              <svg viewBox="0 0 256 256" width="1em" height="1em" aria-hidden="true" focusable="false">
                <path d="M232.4,114.49,88.32,26.35a16,16,0,0,0-16.2-.3A15.86,15.86,0,0,0,64,39.87V216.13A15.94,15.94,0,0,0,80,232a16.07,16.07,0,0,0,8.36-2.35L232.4,141.51a15.81,15.81,0,0,0,0-27ZM80,215.94V40l143.83,88Z" fill="currentColor" />
              </svg>
            </span>
          </button>
          <span className={styles.meter}>
            <span className={styles.fill} style={fillVars} />
          </span>
          <span className={styles.count} aria-hidden="true">{index + 1} / {SHOTS.length}</span>
        </div>
        <span className={styles.dots} role="group" aria-label={DOTS_LABEL}>
          {SHOTS.map((shot, i) => (
            <button
              key={shot.dot}
              className={styles.dot}
              type="button"
              aria-label={shot.dot}
              aria-current={i === index ? "true" : "false"}
              onClick={() => jump(i)}
            />
          ))}
        </span>
      </div>
    </main>
  );
}