05Native <dialog> lightbox

<main class="stage">
  <div class="lb-frame is-demo">
    <button class="lb-thumb" type="button" aria-haspopup="dialog">
      <span class="lb-thumb__photo"></span>
      <span class="lb-thumb__label">View</span>
    </button>
    <dialog class="lb-dialog" aria-labelledby="lb-title">
      <div class="lb-dialog__photo"></div>
      <h2 id="lb-title" class="lb-dialog__title">Studio 04</h2>
      <button class="lb-close" type="button">Close</button>
    </dialog>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;
$easing: $ease-out;
$color: $subject-cream;

@include stage($stage-ink);

.lb-frame { position: relative; }

.lb-thumb {
  border: 0; border-radius: $r-card; overflow: hidden; cursor: pointer; padding: 0;
  width: min(220px, 64vw); aspect-ratio: 4 / 3; position: relative;
  -webkit-tap-highlight-color: transparent;
}
.lb-thumb__photo {
  position: absolute; inset: 0;
  background:
    radial-gradient(90px circle at 66% 30%, rgba(255, 255, 255, .55), transparent 60%),
    linear-gradient(150deg, $subject-blue, $stage-ink);
}
.lb-thumb__label {
  position: absolute; right: $sp-2; bottom: $sp-2;
  padding: $sp-1 $sp-3; border-radius: $r-pill;
  background: rgba(23, 20, 26, .55); color: $color;
  font: 600 11px/1 -apple-system, "Segoe UI", sans-serif;
}

// dialog: 실제 open 은 브라우저 기본(즉시)으로 둔다 — @starting-style 은 브라우저마다 지원이 갈려 쓰지 않는다(함정 섹션 참고)
dialog.lb-dialog {
  border: 0; margin: auto; position: fixed; inset: 0;
  width: min(80vw, 300px); padding: $sp-5;
  border-radius: $r-card; background: $stage-paper; color: $subject-ink;
  box-shadow: $shadow-raised;
}
// ::backdrop 은 정적 rgba 하나로 둔다 — 애니메이션시키지 않는다
dialog.lb-dialog::backdrop { background: rgba(23, 20, 26, .55); }

.lb-dialog__photo {
  width: 100%; aspect-ratio: 4 / 3; border-radius: $r-sm; margin-bottom: $sp-3;
  background:
    radial-gradient(90px circle at 66% 30%, rgba(255, 255, 255, .55), transparent 60%),
    linear-gradient(150deg, $subject-blue, $stage-ink);
}
.lb-dialog__title { margin: 0 0 $sp-3; font-size: 14px; }
.lb-close {
  border: 0; border-radius: $r-control; background: $subject-blue; color: $stage-paper;
  padding: $sp-2 $sp-4; font: 600 12px/1 -apple-system, "Segoe UI", sans-serif; cursor: pointer;
}

// 데모 캡처: 진짜 showModal() 로 연 뒤(위 <script>), 시각적 열림만 keyframes 로 반복한다 — backdrop 은 정적인 채로 둔다
.lb-frame.is-demo dialog.lb-dialog {
  animation: lb-pop $dur-loop $easing infinite;
}
@keyframes lb-pop {
  0%   { opacity: 0; transform: scale(.85); }
  15%  { opacity: 1; transform: scale(1); }
  70%  { opacity: 1; transform: scale(1); }
  85%  { opacity: 0; transform: scale(.85); }
  100% { opacity: 0; transform: scale(.85); }
}

@media (prefers-reduced-motion: reduce) {
  .lb-frame.is-demo dialog.lb-dialog { animation: none !important; opacity: 1 !important; transform: none !important; }
}

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);
}

.lb-frame {
  position: relative;
}

.lb-thumb {
  border: 0;
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  padding: 0;
  width: min(220px, 64vw);
  aspect-ratio: 4/3;
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.lb-thumb__photo {
  position: absolute;
  inset: 0;
  background: radial-gradient(90px circle at 66% 30%, rgba(255, 255, 255, 0.55), transparent 60%), linear-gradient(150deg, #2f6df6, #17141a);
}

.lb-thumb__label {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.55);
  color: #fff7e6;
  font: 600 11px/1 -apple-system, "Segoe UI", sans-serif;
}

dialog.lb-dialog {
  border: 0;
  margin: auto;
  position: fixed;
  inset: 0;
  width: min(80vw, 300px);
  padding: 20px;
  border-radius: 16px;
  background: #ffffff;
  color: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

dialog.lb-dialog::backdrop {
  background: rgba(23, 20, 26, 0.55);
}

.lb-dialog__photo {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 8px;
  margin-bottom: 12px;
  background: radial-gradient(90px circle at 66% 30%, rgba(255, 255, 255, 0.55), transparent 60%), linear-gradient(150deg, #2f6df6, #17141a);
}

.lb-dialog__title {
  margin: 0 0 12px;
  font-size: 14px;
}

.lb-close {
  border: 0;
  border-radius: 12px;
  background: #2f6df6;
  color: #ffffff;
  padding: 8px 16px;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}

.lb-frame.is-demo dialog.lb-dialog {
  animation: lb-pop 2s ease-out infinite;
}

@keyframes lb-pop {
  0% {
    opacity: 0;
    transform: scale(0.85);
  }
  15% {
    opacity: 1;
    transform: scale(1);
  }
  70% {
    opacity: 1;
    transform: scale(1);
  }
  85% {
    opacity: 0;
    transform: scale(0.85);
  }
  100% {
    opacity: 0;
    transform: scale(0.85);
  }
}
@media (prefers-reduced-motion: reduce) {
  .lb-frame.is-demo dialog.lb-dialog {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

var dlg = document.querySelector('.lb-dialog'), btn = document.querySelector('.lb-close'), frame = document.querySelector('.lb-frame');
document.querySelector('.lb-thumb').addEventListener('click', function () {
  frame.classList.remove('is-demo');
  if (!dlg.open) { dlg.showModal(); btn.focus({ preventScroll: true }); }
});
btn.addEventListener('click', function () { dlg.close(); });
if (frame.classList.contains('is-demo')) { dlg.showModal(); btn.focus({ preventScroll: true }); }

import { useRef } from "react";
import styles from "./LightboxDialog.module.scss";

export interface LightboxDialogProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function LightboxDialog({
  duration = "300ms",
  easing = "ease-out",
}: LightboxDialogProps) {
  const dialogRef = useRef<HTMLDialogElement>(null);
  const closeRef = useRef<HTMLButtonElement>(null);

  function open() {
    dialogRef.current?.showModal();
    closeRef.current?.focus({ preventScroll: true });
  }
  function close() {
    dialogRef.current?.close();
  }

  return (
    <div className={styles.frame} style={{ transitionDuration: duration, transitionTimingFunction: easing }}>
      <button className={styles.thumb} type="button" aria-haspopup="dialog" onClick={open}>
        <span className={styles.thumbPhoto} />
        <span className={styles.thumbLabel}>View</span>
      </button>
      <dialog ref={dialogRef} className={styles.dialog} aria-labelledby="lb-title-react">
        <div className={styles.dialogPhoto} />
        <h2 id="lb-title-react" className={styles.dialogTitle}>Studio 04</h2>
        <button ref={closeRef} className={styles.close} type="button" onClick={close}>Close</button>
      </dialog>
    </div>
  );
}