06Close button with a ring that keeps circling

<main class="stage">
  <section class="cl is-demo" id="cl" aria-label="A notice card with a ring-spinning close button">
    <article class="cl__card">
      <p class="cl__msg">Your 10% first-order coupon lasts ten more days</p>
      <button class="cl__btn" type="button" id="cl-btn" aria-label="Close the notice">
        <span class="cl__ring" aria-hidden="true"></span>
        <span class="cl__x" aria-hidden="true"><svg viewBox="0 0 256 256" width="1em" height="1em" fill="currentColor"><path d="M216,56V200a16,16,0,0,1-16,16H56a16,16,0,0,1-16-16V56A16,16,0,0,1,56,40H200A16,16,0,0,1,216,56Z" opacity=".2"/><path d="M205.66,194.34a8,8,0,0,1-11.32,11.32L128,139.31,61.66,205.66a8,8,0,0,1-11.32-11.32L116.69,128,50.34,61.66A8,8,0,0,1,61.66,50.34L128,116.69l66.34-66.35a8,8,0,0,1,11.32,11.32L139.31,128Z"/></svg></span>
      </button>
      <p class="cl__undo" id="cl-undo" aria-live="polite">Notice closed <button class="cl__back" type="button" id="cl-back">Undo</button></p>
    </article>
  </section>
</main>

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

// 링이 빙글 도는 닫기 버튼 — 점선 링은 호버와 :focus-visible 에서만 돌고 카드가 진해진다
$duration: $dur-quick;
$easing: $ease-spring;
$color: $subject-ink;

@include stage($stage-yellow);

.cl { display: grid; font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif; }

.cl__card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: $sp-3;
  box-sizing: border-box;
  width: min(252px, 92vw);
  min-height: 96px;
  padding: $sp-4 $sp-4 $sp-4 $sp-4;
  border: 1px solid rgba(23, 20, 26, .2);
  border-radius: $r-card;
  background: $stage-paper;
  color: $subject-ink;
}

.cl__msg {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.cl__undo {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 11px;
  line-height: 1.6;
  color: rgba(23, 20, 26, .6);
  opacity: 0;
}
.cl__back {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: $subject-blue;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.6;
  text-decoration: underline;
  cursor: pointer;
}
.cl__back:focus-visible { outline: 2px solid $subject-blue; outline-offset: 1px; }

// ── 닫기 버튼과 점선 링 ──
.cl__btn {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: $subject-ink;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}
.cl__btn:focus-visible { outline: 2px solid $subject-ink; outline-offset: 3px; }

.cl__ring {
  position: absolute;
  inset: 0;
  border: 3px dashed currentColor;
  border-radius: 50%;
  opacity: .35;
  transform: rotate(0deg);
}
.cl__x {
  display: inline-flex;
  transition: transform $dur-base $easing;
}
.cl__btn:hover .cl__ring,
.cl__btn:focus-visible .cl__ring {
  opacity: 1;
  animation-name: cl-spin;
  animation-duration: 900ms;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
.cl__btn:hover .cl__x,
.cl__btn:focus-visible .cl__x { transform: rotate(90deg); }
.cl__btn:active .cl__x { transform: rotate(90deg) scale(.86); }
@keyframes cl-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

// 정적 경로 — 누르면 카드가 접히고 되돌리기가 남는다 (퇴장이 아니라 접힘)
.cl.is-gone .cl__card {
  display: grid;
  grid-template-rows: 0fr 1fr;
  align-content: start;
  padding: 0 $sp-5 0 $sp-4;
  min-height: 0;
  border-style: dashed;
  overflow: hidden;
}
.cl.is-gone .cl__msg {
  grid-row: 1;
  min-height: 0;
  overflow: hidden;
  font-size: 0;
  line-height: 0;
}
.cl.is-gone .cl__btn { display: none; }
.cl.is-gone .cl__undo { opacity: 1; padding: $sp-2 0; }

// ── 격자 미리보기 전용 2초 루프: 링 회전 + 카드 물들임 컷 ──
@keyframes cl-loop-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes cl-loop-x {
  0%, 10% { transform: rotate(0deg); }
  30%, 100% { transform: rotate(90deg); }
}
// 호버가 붙은 순간만 버튼 자리가 먹색으로 컷 전환된다 (카드 본문은 건드리지 않는다)
@keyframes cl-loop-seat {
  0%, 9% { background: transparent; color: $subject-ink; }
  10%, 86% { background: $subject-ink; color: $stage-yellow; }
  87%, 100% { background: transparent; color: $subject-ink; }
}
.cl.is-demo {
  .cl__ring {
    opacity: 1;
    animation-name: cl-loop-spin;
    animation-duration: 900ms;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
  }
  .cl__x {
    animation-name: cl-loop-x;
    animation-duration: $dur-loop;
    animation-timing-function: $easing;
    animation-iteration-count: infinite;
  }
  .cl__btn {
    animation-name: cl-loop-seat;
    animation-duration: $dur-loop;
    animation-timing-function: steps(1, end);
    animation-iteration-count: infinite;
  }
}

@media (max-width: 340px) {
  .cl__card { padding: $sp-3 $sp-4 $sp-3 $sp-3; min-height: 84px; }
  .cl__msg { font-size: 12px; }
  .cl__btn { width: 40px; height: 40px; font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .cl.is-demo .cl__ring,
  .cl.is-demo .cl__x,
  .cl.is-demo .cl__btn { animation: none !important; transform: none !important; }
  // 진해진 상태(호버 결과)만 남기고 돌기는 끈다
  .cl.is-demo .cl__ring { opacity: 1 !important; }
  .cl.is-demo .cl__x { transform: rotate(90deg) !important; }
  .cl.is-demo .cl__btn { background: $subject-ink !important; color: $stage-yellow !important; }
  .cl__btn:hover .cl__ring,
  .cl__btn:focus-visible .cl__ring { animation: none !important; }
}

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);
}

.cl {
  display: grid;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.cl__card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  box-sizing: border-box;
  width: min(252px, 92vw);
  min-height: 96px;
  padding: 16px 16px 16px 16px;
  border: 1px solid rgba(23, 20, 26, 0.2);
  border-radius: 16px;
  background: #ffffff;
  color: #17141a;
}

.cl__msg {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.cl__undo {
  grid-column: 1/-1;
  margin: 0;
  font-size: 11px;
  line-height: 1.6;
  color: rgba(23, 20, 26, 0.6);
  opacity: 0;
}

.cl__back {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: #2f6df6;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.6;
  text-decoration: underline;
  cursor: pointer;
}

.cl__back:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 1px;
}

.cl__btn {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #17141a;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.cl__btn:focus-visible {
  outline: 2px solid #17141a;
  outline-offset: 3px;
}

.cl__ring {
  position: absolute;
  inset: 0;
  border: 3px dashed currentColor;
  border-radius: 50%;
  opacity: 0.35;
  transform: rotate(0deg);
}

.cl__x {
  display: inline-flex;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cl__btn:hover .cl__ring,
.cl__btn:focus-visible .cl__ring {
  opacity: 1;
  animation-name: cl-spin;
  animation-duration: 900ms;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.cl__btn:hover .cl__x,
.cl__btn:focus-visible .cl__x {
  transform: rotate(90deg);
}

.cl__btn:active .cl__x {
  transform: rotate(90deg) scale(0.86);
}

@keyframes cl-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.cl.is-gone .cl__card {
  display: grid;
  grid-template-rows: 0fr 1fr;
  align-content: start;
  padding: 0 20px 0 16px;
  min-height: 0;
  border-style: dashed;
  overflow: hidden;
}

.cl.is-gone .cl__msg {
  grid-row: 1;
  min-height: 0;
  overflow: hidden;
  font-size: 0;
  line-height: 0;
}

.cl.is-gone .cl__btn {
  display: none;
}

.cl.is-gone .cl__undo {
  opacity: 1;
  padding: 8px 0;
}

@keyframes cl-loop-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
@keyframes cl-loop-x {
  0%, 10% {
    transform: rotate(0deg);
  }
  30%, 100% {
    transform: rotate(90deg);
  }
}
@keyframes cl-loop-seat {
  0%, 9% {
    background: transparent;
    color: #17141a;
  }
  10%, 86% {
    background: #17141a;
    color: #ffd23f;
  }
  87%, 100% {
    background: transparent;
    color: #17141a;
  }
}
.cl.is-demo .cl__ring {
  opacity: 1;
  animation-name: cl-loop-spin;
  animation-duration: 900ms;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
.cl.is-demo .cl__x {
  animation-name: cl-loop-x;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}
.cl.is-demo .cl__btn {
  animation-name: cl-loop-seat;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@media (max-width: 340px) {
  .cl__card {
    padding: 12px 16px 12px 12px;
    min-height: 84px;
  }
  .cl__msg {
    font-size: 12px;
  }
  .cl__btn {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cl.is-demo .cl__ring,
  .cl.is-demo .cl__x,
  .cl.is-demo .cl__btn {
    animation: none !important;
    transform: none !important;
  }
  .cl.is-demo .cl__ring {
    opacity: 1 !important;
  }
  .cl.is-demo .cl__x {
    transform: rotate(90deg) !important;
  }
  .cl.is-demo .cl__btn {
    background: #17141a !important;
    color: #ffd23f !important;
  }
  .cl__btn:hover .cl__ring,
  .cl__btn:focus-visible .cl__ring {
    animation: none !important;
  }
}

// 닫기 버튼: 호버·초점엔 링이 돌고, 누르면 카드가 접히며 되돌리기가 남는다
var cl = document.getElementById('cl');
var clBtn = document.getElementById('cl-btn');
var clBack = document.getElementById('cl-back');
clBtn.addEventListener('click', function () {
  cl.classList.remove('is-demo');
  cl.classList.add('is-gone');
});
clBack.addEventListener('click', function () {
  cl.classList.remove('is-gone');
  clBtn.focus({ preventScroll: true });
});
cl.addEventListener('keydown', function (e) {
  if (e.key === 'Escape') cl.classList.remove('is-gone');
});

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

export type CloseRingButtonProps = {
  msg?: string;
  /** 닫은 뒤 남는 줄 */
  goneText?: string;
  undoLabel?: string;
  closeLabel?: string;
  groupLabel?: string;
  /** 격자 미리보기용 2초 자동 루프. 사람이 손대면 꺼진다 */
  demo?: boolean;
  /** 점선 링이 한 바퀴 도는 시간(ms) */
  duration?: number;
  easing?: string;
  /** 아이콘과 초점 테두리의 색 */
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

// react ambient 에 KeyboardEvent 가 없어 쓰는 자리에 맞춰 직접 좁게 선언한다
type KeyEvt = { key: string };

function X() {
  return (
    <svg viewBox="0 0 256 256" width="1em" height="1em" fill="currentColor">
      <path d="M216,56V200a16,16,0,0,1-16,16H56a16,16,0,0,1-16-16V56A16,16,0,0,1,56,40H200A16,16,0,0,1,216,56Z" opacity=".2" />
      <path d="M205.66,194.34a8,8,0,0,1-11.32,11.32L128,139.31,61.66,205.66a8,8,0,0,1-11.32-11.32L116.69,128,50.34,61.66A8,8,0,0,1,61.66,50.34L128,116.69l66.34-66.35a8,8,0,0,1,11.32,11.32L139.31,128Z" />
    </svg>
  );
}

export default function CloseRingButton({
  msg = "Your 10% first-order coupon is good for ten more days",
  goneText = "Notice closed",
  undoLabel = "Undo",
  closeLabel = "Close notice",
  groupLabel = "Notice card with a close button that keeps circling",
  demo = true,
  duration = 900,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#17141a",
}: CloseRingButtonProps) {
  const [gone, setGone] = useState(false);
  const [live, setLive] = useState(demo);
  const [refocus, setRefocus] = useState(false);
  const btnRef = useRef<HTMLButtonElement>(null);

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

  // 닫기 버튼은 접힌 뒤 display:none 이라, 되돌린 다음 프레임에서 초점을 준다
  useEffect(() => {
    if (!refocus) return;
    setRefocus(false);
    if (btnRef.current) btnRef.current.focus({ preventScroll: true });
  }, [refocus]);

  function close() {
    setLive(false);
    setGone(true);
  }

  function undo() {
    setGone(false);
    setRefocus(true);
  }

  function onKey(e: KeyEvt) {
    if (e.key === "Escape") undo();
  }

  const cls = [styles.cl, live ? styles.isDemo : "", gone ? styles.isGone : ""].filter(Boolean).join(" ");

  return (
    <section className={cls} style={vars} aria-label={groupLabel} onKeyDown={onKey}>
      <article className={styles.card}>
        <p className={styles.msg}>{msg}</p>
        <p className={styles.undo} aria-live="polite">
          {gone ? goneText : ""}{" "}
          <button className={styles.back} type="button" onClick={undo}>
            {undoLabel}
          </button>
        </p>
        <button className={styles.btn} type="button" aria-label={closeLabel} onClick={close} ref={btnRef}>
          {/* 호버·:focus-visible 에서만 도는 점선 링 */}
          <span className={styles.ring} aria-hidden="true" />
          <span className={styles.x} aria-hidden="true">
            <X />
          </span>
        </button>
      </article>
    </section>
  );
}