09User avatar dropdown menu

<main class="stage">
  <div class="um">
    <button class="um__avatar is-demo" type="button" aria-haspopup="menu" aria-expanded="true" aria-label="Account menu">
      <span class="um__ring" aria-hidden="true"></span>
      <span class="um__initial" aria-hidden="true">D</span>
    </button>
    <div class="um__menu is-open" role="menu">
      <div class="um__who">
        <strong>Dohyun</strong>
        <span>[email protected]</span>
      </div>
      <button class="um__item" type="button" role="menuitem"><span class="um__ic" aria-hidden="true"></span>Profile</button>
      <button class="um__item" type="button" role="menuitem"><span class="um__ic" aria-hidden="true"></span>Settings</button>
      <button class="um__item um__item--danger" type="button" role="menuitem"><span class="um__ic" aria-hidden="true"></span>Log out</button>
    </div>
  </div>
</main>

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

$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue;

@include stage($stage-orange);

// 드롭다운이 아래로 펼쳐지므로 무대 중앙 정렬 대신 위쪽에 앵커한다 (실측: 중앙 정렬이면 메뉴가 300px 아래로 넘친다)
.stage { align-items: flex-start; padding-top: $sp-8; }

.um { position: relative; box-sizing: border-box; width: min(260px, 86vw); display: flex; justify-content: flex-end; }
.um__avatar {
  position: relative;
  width: $sp-8; height: $sp-8;
  border-radius: 50%;
  border: 0;
  background: $stage-ink;
  color: $subject-cream;
  font-weight: 800; font-size: 14px;
  cursor: pointer;
  display: grid; place-items: center;
}
.um__ring {
  position: absolute; inset: -3px;
  border-radius: 50%;
  border: 2px solid $subject-cream;
  opacity: 0;
}
.um__initial { position: relative; z-index: 1; }

.um__menu {
  box-sizing: border-box;
  position: absolute; top: calc(100% + #{$sp-2}); right: 0;
  width: 190px;
  border-radius: $r-card;
  background: $subject-cream;
  box-shadow: $shadow-raised;
  padding: $sp-2;
  transform-origin: top right; // 규칙8: 아바타 모서리서 펼침
  opacity: 0; transform: scale(.92) translateY(-4px);
  pointer-events: none;
  transition: opacity $duration $easing, transform $duration $easing;
}
.um__menu.is-open { opacity: 1; transform: scale(1) translateY(0); pointer-events: auto; }
.um__who { padding: $sp-2; border-bottom: 1px solid rgba(23, 20, 26, .1); margin-bottom: $sp-1; }
.um__who strong { display: block; font-size: 12px; color: $stage-ink; }
.um__who span { display: block; font-size: 10px; color: rgba(23, 20, 26, .72); }
.um__item {
  width: 100%;
  display: flex; align-items: center; gap: $sp-2;
  border: 0; background: transparent; cursor: pointer;
  padding: $sp-2; border-radius: $r-sm;
  font: inherit; font-weight: 600; font-size: 12px; color: $stage-ink; text-align: left;
  transition: background $dur-quick $easing;
}
.um__item:hover, .um__item:focus-visible { background: rgba(23, 20, 26, .06); }
.um__item--danger { color: $error; }
.um__ic { width: $sp-3; height: $sp-3; border-radius: $r-xs; background: currentColor; opacity: .55; }

// ── 자동 루프: 아바타 링이 은은하게 퍼지고 메뉴가 열리는 모션을 반복한다 ──────────────
.um__avatar.is-demo .um__ring { animation: um-pulse 2s ease-out infinite; }
.um__avatar.is-demo + .um__menu { animation: um-pop 2s $easing infinite; }
@keyframes um-pulse {
  0%   { opacity: .55; transform: scale(1); }
  70%, 100% { opacity: 0; transform: scale(1.35); }
}
@keyframes um-pop {
  0%   { opacity: 0; transform: scale(.92) translateY(-4px); }
  18%, 100% { opacity: 1; transform: scale(1) translateY(0); }
}

@media (max-width: 340px) {
  .um__menu { width: 168px; }
}

@media (max-height: 220px) {
  .stage { padding-top: $sp-2; }
  .um__menu { top: calc(100% + 4px); padding: $sp-1; }
  .um__who { padding: $sp-1; margin-bottom: $sp-1; }
  .um__who span { display: none; }
  .um__item { padding: 4px $sp-1; gap: $sp-1; }
}

@media (prefers-reduced-motion: reduce) {
  .um__avatar.is-demo .um__ring { animation: none !important; }
  .um__menu { animation: none !important; transition: none; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.stage {
  align-items: flex-start;
  padding-top: 32px;
}

.um {
  position: relative;
  box-sizing: border-box;
  width: min(260px, 86vw);
  display: flex;
  justify-content: flex-end;
}

.um__avatar {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 0;
  background: #17141a;
  color: #fff7e6;
  font-weight: 800;
  font-size: 14px;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.um__ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid #fff7e6;
  opacity: 0;
}

.um__initial {
  position: relative;
  z-index: 1;
}

.um__menu {
  box-sizing: border-box;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 190px;
  border-radius: 16px;
  background: #fff7e6;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  padding: 8px;
  transform-origin: top right;
  opacity: 0;
  transform: scale(0.92) translateY(-4px);
  pointer-events: none;
  transition: opacity 220ms cubic-bezier(0.2, 1.4, 0.4, 1), transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.um__menu.is-open {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.um__who {
  padding: 8px;
  border-bottom: 1px solid rgba(23, 20, 26, 0.1);
  margin-bottom: 4px;
}

.um__who strong {
  display: block;
  font-size: 12px;
  color: #17141a;
}

.um__who span {
  display: block;
  font-size: 10px;
  color: rgba(23, 20, 26, 0.72);
}

.um__item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  font-size: 12px;
  color: #17141a;
  text-align: left;
  transition: background 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.um__item:hover, .um__item:focus-visible {
  background: rgba(23, 20, 26, 0.06);
}

.um__item--danger {
  color: #c2361a;
}

.um__ic {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: currentColor;
  opacity: 0.55;
}

.um__avatar.is-demo .um__ring {
  animation: um-pulse 2s ease-out infinite;
}

.um__avatar.is-demo + .um__menu {
  animation: um-pop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes um-pulse {
  0% {
    opacity: 0.55;
    transform: scale(1);
  }
  70%, 100% {
    opacity: 0;
    transform: scale(1.35);
  }
}
@keyframes um-pop {
  0% {
    opacity: 0;
    transform: scale(0.92) translateY(-4px);
  }
  18%, 100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
@media (max-width: 340px) {
  .um__menu {
    width: 168px;
  }
}
@media (max-height: 220px) {
  .stage {
    padding-top: 8px;
  }
  .um__menu {
    top: calc(100% + 4px);
    padding: 4px;
  }
  .um__who {
    padding: 4px;
    margin-bottom: 4px;
  }
  .um__who span {
    display: none;
  }
  .um__item {
    padding: 4px 4px;
    gap: 4px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .um__avatar.is-demo .um__ring {
    animation: none !important;
  }
  .um__menu {
    animation: none !important;
    transition: none;
  }
}

// 실제 동작: 아바타를 누르면 메뉴가 실제로 열리고, 바깥을 클릭하거나 Esc를 누르면 실제로 닫힌다.
var avatar = document.querySelector('.um__avatar');
var menu = document.querySelector('.um__menu');
function close() {
  avatar.setAttribute('aria-expanded', 'false');
  menu.classList.remove('is-open');
}
function open() {
  avatar.setAttribute('aria-expanded', 'true');
  menu.classList.add('is-open');
}
avatar.addEventListener('click', function () {
  avatar.classList.remove('is-demo');
  var expanded = avatar.getAttribute('aria-expanded') === 'true';
  expanded ? close() : open();
});
document.addEventListener('click', function (e) {
  if (!e.target.closest('.um')) close();
});
document.addEventListener('keydown', function (e) {
  if (e.key === 'Escape') close();
});

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

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

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

export default function UserMenu({ duration = 220, easing = "cubic-bezier(.2,1.4,.4,1)", color = "#2f6df6" }: UserMenuProps) {
  const [open, setOpen] = useState(true);
  const ref = useRef<HTMLDivElement | null>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  useEffect(() => {
    function onDocClick(e: MouseEvent) {
      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false);
    }
    function onKey(e: KeyboardEvent) {
      if (e.key === "Escape") setOpen(false);
    }
    document.addEventListener("click", onDocClick);
    document.addEventListener("keydown", onKey);
    return () => {
      document.removeEventListener("click", onDocClick);
      document.removeEventListener("keydown", onKey);
    };
  }, []);

  return (
    <div className={styles.um} style={vars} ref={ref}>
      <button type="button" className={styles.avatar} aria-haspopup="menu" aria-expanded={open} aria-label="계정 메뉴" onClick={() => setOpen((v) => !v)}>
        D
      </button>
      <div className={`${styles.menu} ${open ? styles.open : ""}`} role="menu">
        <div className={styles.who}>
          <strong>도윤</strong>
          <span>[email protected]</span>
        </div>
        <button type="button" role="menuitem" className={styles.item}>프로필</button>
        <button type="button" role="menuitem" className={styles.item}>설정</button>
        <button type="button" role="menuitem" className={`${styles.item} ${styles.danger}`}>로그아웃</button>
      </div>
    </div>
  );
}