02Drawer dùng dialog gốc

<main class="stage is-demo">
  <div class="page">
    <button class="trigger" type="button">Mở thiết lập</button>
  </div>
  <dialog class="drawer" id="d2" aria-labelledby="t2">
    <h2 id="t2">Thiết lập</h2>
    <p>Bảng này chính là phần tử dialog gốc của trình duyệt — ESC, click ra ngoài và bẫy focus không phải tự viết tay.</p>
    <button class="drawer__close" type="button">Đóng</button>
  </dialog>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;       // 300ms — 실사용 여닫힘 속도
$easing: $ease-spring;
$color: $subject-cream;     // 트리거·닫기 버튼 강조색

// ── 데모 무대 ───────────────────────────────────────────
@include stage($stage-yellow);

.stage { position: relative; }
.page { display: grid; place-items: center; }

.trigger {
  border: 0; border-radius: $r-pill;
  padding: $sp-3 $sp-6;
  font-weight: 600;
  font-size: clamp(13px, 4vmin, 16px);
  line-height: 1;
  font-family: inherit;
  color: $stage-yellow; background: $stage-ink;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}

// UA 기본(가운데 고정·테두리·max-width)을 지우고 좌측 전체 높이 패널로
.drawer {
  position: fixed; inset: 0 auto 0 0; margin: 0;
  width: min(76vw, 240px); height: 100%; max-height: none;
  box-sizing: border-box;
  display: flex; flex-direction: column; gap: $sp-2;
  padding: $sp-6 $sp-4;
  border: 0; border-radius: 0;
  background: $stage-paper; color: $stage-ink;
  box-shadow: $shadow-raised;

  h2 { margin: 0 0 $sp-2; font-size: clamp(13px, 4.2vmin, 17px); }
  p  { margin: 0 0 $sp-4; font-size: clamp(10px, 3.2vmin, 13px); color: rgba($stage-ink, .7); }

  &::backdrop { background: rgba($stage-ink, .55); }
}

.drawer__close {
  margin-top: auto;
  border: 0; border-radius: $r-control;
  background: $color; color: $stage-ink;
  padding: $sp-2 $sp-4;
  font-weight: 600; font-size: 13px; line-height: 1; font-family: inherit; cursor: pointer;
}

// 실사용(모던 브라우저): [open] 이 붙는 순간·떨어지는 순간에도 트랜지션이 걸리도록
// @starting-style + transition-behavior: allow-discrete. 값은 transform 만 움직인다.
.drawer {
  transition: transform $duration $easing, overlay $duration allow-discrete, display $duration allow-discrete;
  transform: translateX(-100%);
}
.drawer[open] { transform: translateX(0); }
@starting-style {
  .drawer[open] { transform: translateX(-100%); }
}

// 데모 루프(.is-demo): showModal 로 이미 열려 있는 상태에서 keyframes 로 2초 주기 재생
.stage.is-demo .drawer           { animation: drawer-loop $dur-loop $easing infinite; }
.stage.is-demo .drawer::backdrop { animation: backdrop-loop $dur-loop ease-in-out infinite; }

@keyframes drawer-loop {
  0%, 100% { transform: translateX(-100%); }
  15%, 70% { transform: translateX(0); }
  85%      { transform: translateX(-100%); }
}
@keyframes backdrop-loop {
  0%, 100% { opacity: 0; }
  15%, 70% { opacity: 1; }
  85%      { opacity: 0; }
}

// ── 접근성: 움직임 줄이기 설정이면 애니메이션 제거. ESC·포커스 트랩은 브라우저 기본이라 그대로 남는다 ──
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .drawer, .stage.is-demo .drawer::backdrop { animation: none; }
  .drawer { transition-duration: 1ms; }
}

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);
}

.stage {
  position: relative;
}

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

.trigger {
  border: 0;
  border-radius: 999px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: clamp(13px, 4vmin, 16px);
  line-height: 1;
  font-family: inherit;
  color: #ffd23f;
  background: #17141a;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.drawer {
  position: fixed;
  inset: 0 auto 0 0;
  margin: 0;
  width: min(76vw, 240px);
  height: 100%;
  max-height: none;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 16px;
  border: 0;
  border-radius: 0;
  background: #ffffff;
  color: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}
.drawer h2 {
  margin: 0 0 8px;
  font-size: clamp(13px, 4.2vmin, 17px);
}
.drawer p {
  margin: 0 0 16px;
  font-size: clamp(10px, 3.2vmin, 13px);
  color: rgba(23, 20, 26, 0.7);
}
.drawer::backdrop {
  background: rgba(23, 20, 26, 0.55);
}

.drawer__close {
  margin-top: auto;
  border: 0;
  border-radius: 12px;
  background: #fff7e6;
  color: #17141a;
  padding: 8px 16px;
  font-weight: 600;
  font-size: 13px;
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
}

.drawer {
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), overlay 300ms allow-discrete, display 300ms allow-discrete;
  transform: translateX(-100%);
}

.drawer[open] {
  transform: translateX(0);
}

@starting-style {
  .drawer[open] {
    transform: translateX(-100%);
  }
}
.stage.is-demo .drawer {
  animation: drawer-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.stage.is-demo .drawer::backdrop {
  animation: backdrop-loop 2s ease-in-out infinite;
}

@keyframes drawer-loop {
  0%, 100% {
    transform: translateX(-100%);
  }
  15%, 70% {
    transform: translateX(0);
  }
  85% {
    transform: translateX(-100%);
  }
}
@keyframes backdrop-loop {
  0%, 100% {
    opacity: 0;
  }
  15%, 70% {
    opacity: 1;
  }
  85% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .drawer, .stage.is-demo .drawer::backdrop {
    animation: none;
  }
  .drawer {
    transition-duration: 1ms;
  }
}

// showModal 한 줄로 열면 포커스 이동·ESC Đóng·바깥 클릭 차단을 브라우저가 대신 한다.
// 로드 시엔 is-demo 를 그대로 두고 열어 데모 루프(keyframes)가 재생되게 한다.
// 실제 클릭(Đóng·바깥·재오픈)이 오면 그때 is-demo 를 떼 실제 상호작용으로 넘긴다.
(function () {
  var stage = document.querySelector('.stage');
  var trigger = document.querySelector('.trigger');
  var dlg = document.getElementById('d2');
  var closeBtn = document.querySelector('.drawer__close');
  function realOpen() { stage.classList.remove('is-demo'); dlg.showModal(); }
  dlg.addEventListener('close', function () { stage.classList.remove('is-demo'); });
  closeBtn.addEventListener('click', function () { dlg.close(); });
  dlg.addEventListener('click', function (e) { if (e.target === dlg) dlg.close(); }); // ::backdrop 클릭과 같은 효과
  trigger.addEventListener('click', realOpen);
  dlg.showModal();
})();

import { useEffect, useRef, useState } from "react";
import type { CSSProperties, MouseEvent } from "react";
import styles from "./DialogDrawer.module.scss";

export type DialogDrawerProps = {
  duration?: number;
  easing?: string;
  color?: string;
  /** 마운트되면 바로 열어 보여줄지(데모용) */
  defaultOpen?: boolean;
};

export default function DialogDrawer({
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#fff7e6",
  defaultOpen = false,
}: DialogDrawerProps) {
  const dialogRef = useRef<HTMLDialogElement | null>(null);
  const [open, setOpen] = useState(defaultOpen);

  useEffect(() => {
    const dlg = dialogRef.current;
    if (!dlg) return;
    if (open && !dlg.open) dlg.showModal();
    if (!open && dlg.open) dlg.close();
  }, [open]);

  useEffect(() => {
    const dlg = dialogRef.current;
    if (!dlg) return;
    const onClose = () => setOpen(false);
    dlg.addEventListener("close", onClose);
    return () => dlg.removeEventListener("close", onClose);
  }, []);

  const vars: CSSProperties = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.stage} style={vars}>
      <button className={styles.trigger} type="button" onClick={() => setOpen(true)}>설정 열기</button>
      <dialog
        ref={dialogRef}
        className={styles.drawer}
        aria-label="설정"
        onClick={(e: MouseEvent<HTMLDialogElement>) => { if (e.target === dialogRef.current) setOpen(false); }}
      >
        <h2>설정</h2>
        <p>브라우저의 dialog 요소가 ESC·포커스 가두기를 대신 관리한다.</p>
        <button className={styles.close} type="button" onClick={() => setOpen(false)}>닫기</button>
      </dialog>
    </div>
  );
}