04キャプチャ難易度段階 — 失敗回数がしきい値の値を超えるたびにキャプチャの枠数の値が増える方式

<main class="stage">
<div class="ace is-demo" id="ace">
  <div class="ace__row">
    <span class="ace__label">失敗 <b id="aceFails">0</b>回</span>
    <span class="ace__stage" id="aceStage">キャプチャなし</span>
  </div>
  <div class="ace__grid" id="aceGrid"></div>
  <button class="ace__btn" id="aceBtn" type="button">ログイン失敗を試す</button>
</div>
</main>

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

// 계산 겹: 캡차 단계 = floor(실패÷STAGE_THRESHOLD), 칸수 = CELL_STEPS[단계] — index.html 참조
@include stage($stage-ink);

.ace {
  width: 100%;
  max-width: 300px;
  display: grid;
  gap: $sp-3;
  justify-items: center;
}

.ace__row {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font: 600 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: $subject-cream;
}

.ace__row b { font-size: 16px; font-variant-numeric: tabular-nums; }

.ace__grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  gap: $sp-2;
  width: 132px;
  min-height: 8px;
}

.ace__cell {
  aspect-ratio: 1;
  border-radius: $r-xs;
  background: $subject-lilac;
  animation: ace-pop $dur-quick $ease-pop backwards;
}

@keyframes ace-pop {
  from { transform: scale(.4); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.ace__btn {
  border: 0;
  border-radius: $r-control;
  padding: $sp-2 $sp-4;
  background: $subject-cream;
  color: $stage-ink;
  font: 700 14px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  cursor: pointer;
  transition: transform $dur-instant $ease-out;

  &:active { transform: scale(.96); }
}

@media (max-width: 340px) {
  .ace { max-width: 220px; }
  .ace__grid { width: 100px; }
}

@media (prefers-reduced-motion: reduce) {
  .ace__btn { transition: none; }
  .ace__cell { animation: none; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.ace {
  width: 100%;
  max-width: 300px;
  display: grid;
  gap: 12px;
  justify-items: center;
}

.ace__row {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font: 600 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #fff7e6;
}

.ace__row b {
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

.ace__grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  gap: 8px;
  width: 132px;
  min-height: 8px;
}

.ace__cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: #b9a0ff;
  animation: ace-pop 220ms cubic-bezier(0.2, 1.4, 0.4, 1) backwards;
}

@keyframes ace-pop {
  from {
    transform: scale(0.4);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
.ace__btn {
  border: 0;
  border-radius: 12px;
  padding: 8px 16px;
  background: #fff7e6;
  color: #17141a;
  font: 700 14px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  cursor: pointer;
  transition: transform 140ms ease-out;
}
.ace__btn:active {
  transform: scale(0.96);
}

@media (max-width: 340px) {
  .ace {
    max-width: 220px;
  }
  .ace__grid {
    width: 100px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ace__btn {
    transition: none;
  }
  .ace__cell {
    animation: none;
  }
}

(function () {
  var root = document.getElementById('ace');
  var btn = document.getElementById('aceBtn');
  var failsEl = document.getElementById('aceFails');
  var stageEl = document.getElementById('aceStage');
  var grid = document.getElementById('aceGrid');

  // 상수: キャプチャ 단계 승격 기준 失敗回数 · 단계별 칸 수(제곱수라야 격자가 맞는다) · 자동재생 리셋 주기
  var STAGE_THRESHOLD = 2;
  var CELL_STEPS = [0, 4, 9, 16]; // 단계 0=없음, 1=2x2, 2=3x3, 3(상한)=4x4
  var AUTOPLAY_RESET_TICKS = 7;

  var fails = 0;

  function render() {
    // 계산 겹: 단계 = min(상한, floor(失敗÷기준)), 칸수 = CELL_STEPS[단계]
    var stage = Math.min(CELL_STEPS.length - 1, Math.floor(fails / STAGE_THRESHOLD));
    var cells = CELL_STEPS[stage];
    var cols = Math.round(Math.sqrt(cells)) || 0;
    failsEl.textContent = String(fails);
    stageEl.textContent = stage === 0 ? 'キャプチャなし' : ('キャプチャ ' + cols + '×' + cols);
    grid.style.setProperty('--cols', cols || 1);
    grid.innerHTML = '';
    for (var i = 0; i < cells; i++) {
      var c = document.createElement('div');
      c.className = 'ace__cell';
      grid.appendChild(c);
    }
  }

  function fail() {
    fails += 1;
    render();
  }

  function reset() {
    fails = 0;
    render();
  }

  btn.addEventListener('click', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
    fail();
  });
  render();

  var autoTimer = null;
  var tick = 0;
  function autoTick() {
    tick += 1;
    if (tick > AUTOPLAY_RESET_TICKS) { reset(); tick = 0; return; }
    fail();
  }
  function stopAutoplay() { if (autoTimer) { clearInterval(autoTimer); autoTimer = null; } }
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (!reduce) { autoTimer = setInterval(autoTick, 300); }
})();

import { useEffect, useRef } from "react";
import styles from "./AuthAttemptCaptchaEscalate.module.scss";

type Box<T> = { current: T };

export default function AuthAttemptCaptchaEscalate() {
  const rootRef = useRef(null) as unknown as Box<HTMLDivElement | null>;

  useEffect(() => {
    const root = rootRef.current;
    if (!root) return;
    const btn = root.querySelector(`.${styles.btn}`) as HTMLButtonElement | null;
    const failsEl = root.querySelector(`.${styles.fails}`) as HTMLElement | null;
    const stageEl = root.querySelector(`.${styles.stagelabel}`) as HTMLElement | null;
    const grid = root.querySelector(`.${styles.grid}`) as HTMLElement | null;
    if (!btn || !failsEl || !stageEl || !grid) return;

    // 상수: 캡차 단계 승격 기준 실패 횟수 · 단계별 칸 수(제곱수라야 격자가 맞는다) · 자동재생 리셋 주기
    const STAGE_THRESHOLD = 2;
    const CELL_STEPS = [0, 4, 9, 16];
    const AUTOPLAY_RESET_TICKS = 7;

    let fails = 0;

    function render() {
      // 계산 겹: 단계 = min(상한, floor(실패÷기준)), 칸수 = CELL_STEPS[단계]
      const stage = Math.min(CELL_STEPS.length - 1, Math.floor(fails / STAGE_THRESHOLD));
      const cells = CELL_STEPS[stage];
      const cols = Math.round(Math.sqrt(cells)) || 0;
      failsEl!.textContent = String(fails);
      stageEl!.textContent = stage === 0 ? "캡차 없음" : "캡차 " + cols + "×" + cols;
      grid!.style.setProperty("--cols", String(cols || 1));
      grid!.innerHTML = "";
      for (let i = 0; i < cells; i++) {
        const c = document.createElement("div");
        c.className = styles.cell;
        grid!.appendChild(c);
      }
    }

    function fail() { fails += 1; render(); }
    function reset() { fails = 0; render(); }

    function onClick() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
      fail();
    }
    btn.addEventListener("click", onClick);
    render();

    let autoTimer: number | null = null;
    let tick = 0;
    function autoTick() {
      tick += 1;
      if (tick > AUTOPLAY_RESET_TICKS) { reset(); tick = 0; return; }
      fail();
    }
    function stopAutoplay() { if (autoTimer !== null) { window.clearInterval(autoTimer); autoTimer = null; } }
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    if (!reduce) { autoTimer = window.setInterval(autoTick, 300); }

    return () => {
      stopAutoplay();
      btn.removeEventListener("click", onClick);
    };
  }, []);

  return (
    <div ref={rootRef} className={`${styles.stage} ${styles.ace} ${styles["is-demo"]}`}>
      <div className={styles.row}>
        <span className={styles.label}>실패 <b className={styles.fails}>0</b>회</span>
        <span className={styles.stagelabel}>캡차 없음</span>
      </div>
      <div className={styles.grid} />
      <button className={styles.btn} type="button">로그인 실패 시도</button>
    </div>
  );
}