05Breadcrumb into a submenu

<main class="stage">
  <div class="pal is-demo" role="dialog" aria-modal="true" aria-label="Command palette">
    <div class="pal__bar">
      <span class="pal__chip" id="chip">
        <span class="pal__chipic" aria-hidden="true"><svg viewBox="0 0 256 256" width="11" height="11"><g fill="currentColor"><path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2"/><path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52"/></g></svg></span>
        Invite to team
      </span>
      <input class="pal__input" id="q" type="text" role="combobox" aria-expanded="true" aria-controls="list-a" aria-label="Search commands" placeholder="Search commands" autocomplete="off">
    </div>
    <p class="pal__live" id="live" aria-live="polite"></p>
    <div class="pal__box">
      <div class="pal__list pal__list--a" id="list-a" role="listbox" aria-label="Command palette">
        <div class="pal__opt" id="a1" role="option" aria-selected="false" tabindex="-1">Invite to team</div>
        <div class="pal__opt" id="a2" role="option" aria-selected="false" tabindex="-1">Share document</div>
        <div class="pal__opt" id="a3" role="option" aria-selected="false" tabindex="-1">Copy link</div>
        <div class="pal__opt" id="a4" role="option" aria-selected="false" tabindex="-1">Move to archive</div>
      </div>
      <div class="pal__list pal__list--b" id="list-b" role="listbox" aria-label="Invite to team" hidden>
        <div class="pal__opt" id="b1" role="option" aria-selected="false" tabindex="-1">Design team</div>
        <div class="pal__opt" id="b2" role="option" aria-selected="false" tabindex="-1">Engineering team</div>
        <div class="pal__opt" id="b3" role="option" aria-selected="false" tabindex="-1">Marketing team</div>
        <div class="pal__opt" id="b4" role="option" aria-selected="false" tabindex="-1">Operations team</div>
      </div>
    </div>
  </div>
</main>

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

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

@include stage($stage-ink);

.pal {
  box-sizing: border-box;
  width: min(264px, 88vw);
  padding: $sp-2;
  background: #fff;
  border-radius: $r-card;
  box-shadow: $shadow-raised;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: $subject-ink;
}

.pal__bar {
  box-sizing: border-box;
  height: 30px;
  display: flex; align-items: center; gap: $sp-2;
  padding: 0 $sp-2;
  border-radius: $r-sm;
  background: rgba(23, 20, 26, .05);
}
.pal__chip {
  flex: 0 0 auto;
  height: 18px;
  display: inline-flex; align-items: center; gap: $sp-1;
  padding: 0 $sp-2;
  border-radius: $r-pill;
  background: rgba(47, 109, 246, .14);
  font-size: 10px; font-weight: 800;
  color: $color;
  white-space: nowrap;
  cursor: pointer;
  opacity: 0;
  transform: translateX(-8px);
}
.pal__chipic { display: inline-flex; }
.pal.is-deep .pal__chip { opacity: 1; transform: translateX(0); }
.pal__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0; background: transparent;
  font-family: inherit;
  font-size: 12px; font-weight: 600;
  color: $subject-ink;
}
.pal__input:focus-visible { outline: 2px solid $color; outline-offset: 2px; border-radius: $r-xs; }
.pal__live {
  position: absolute;
  width: 1px; height: 1px;
  margin: 0;
  overflow: hidden;
  clip-path: inset(50%);
}

.pal__box {
  position: relative;
  box-sizing: border-box;
  height: 96px;
  margin: $sp-2 0 0;
}
.pal__list { position: absolute; left: 0; top: 0; width: 100%; }
.pal__opt {
  box-sizing: border-box;
  height: 24px;
  display: flex; align-items: center;
  padding: 0 $sp-2;
  border-radius: $r-sm;
  font-size: 12px; font-weight: 600;
  color: rgba(23, 20, 26, .82);
  white-space: nowrap;
  cursor: pointer;
}
.pal__opt.is-at { background: rgba(47, 109, 246, .12); color: $color; }

// ── 자동 루프: 칩이 생기며 명령 목록이 팀 목록으로 갈렸다가, 칩이 빠지며 되돌아온다 ──
// 두 목록은 같은 자리를 쓰므로 steps(1) 로 한 프레임에 교체한다 (겹쳐 비치는 프레임 0)
.pal.is-demo .pal__list--b[hidden] { display: block; }
.pal.is-demo .pal__chip { animation: chip-in $dur-loop $easing infinite; }
.pal.is-demo .pal__list--a { animation: cut-out $dur-loop steps(1, end) infinite; }
.pal.is-demo .pal__list--b { animation: cut-in $dur-loop steps(1, end) infinite; }
.pal.is-demo .pal__list--b .pal__opt { animation: slide-in $dur-loop $easing infinite; }
.pal.is-demo #b2 { animation-delay: 50ms; }
.pal.is-demo #b3 { animation-delay: 100ms; }
.pal.is-demo #b4 { animation-delay: 150ms; }
@keyframes chip-in {
  0%, 16%   { opacity: 0; transform: translateX(-8px); }
  26%, 78%  { opacity: 1; transform: translateX(0); }
  88%, 100% { opacity: 0; transform: translateX(-8px); }
}
@keyframes cut-out {
  0%, 17%   { opacity: 1; }
  18%, 84%  { opacity: 0; }
  85%, 100% { opacity: 1; }
}
@keyframes cut-in {
  0%, 17%   { opacity: 0; }
  18%, 84%  { opacity: 1; }
  85%, 100% { opacity: 0; }
}
@keyframes slide-in {
  0%, 18%   { transform: translateX(16px); }
  32%, 84%  { transform: translateX(0); }
  85%, 100% { transform: translateX(16px); }
}

@media (prefers-reduced-motion: reduce) {
  .pal.is-demo .pal__chip,
  .pal.is-demo .pal__list--a,
  .pal.is-demo .pal__list--b,
  .pal.is-demo .pal__list--b .pal__opt { animation: none !important; }
  .pal.is-demo .pal__list--b[hidden] { display: none; }
  .pal.is-demo .pal__chip { opacity: 0; }
}

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);
}

.pal {
  box-sizing: border-box;
  width: min(264px, 88vw);
  padding: 8px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #17141a;
}

.pal__bar {
  box-sizing: border-box;
  height: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  border-radius: 8px;
  background: rgba(23, 20, 26, 0.05);
}

.pal__chip {
  flex: 0 0 auto;
  height: 18px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(47, 109, 246, 0.14);
  font-size: 10px;
  font-weight: 800;
  color: #2f6df6;
  white-space: nowrap;
  cursor: pointer;
  opacity: 0;
  transform: translateX(-8px);
}

.pal__chipic {
  display: inline-flex;
}

.pal.is-deep .pal__chip {
  opacity: 1;
  transform: translateX(0);
}

.pal__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: #17141a;
}

.pal__input:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
  border-radius: 4px;
}

.pal__live {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip-path: inset(50%);
}

.pal__box {
  position: relative;
  box-sizing: border-box;
  height: 96px;
  margin: 8px 0 0;
}

.pal__list {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
}

.pal__opt {
  box-sizing: border-box;
  height: 24px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(23, 20, 26, 0.82);
  white-space: nowrap;
  cursor: pointer;
}

.pal__opt.is-at {
  background: rgba(47, 109, 246, 0.12);
  color: #2f6df6;
}

.pal.is-demo .pal__list--b[hidden] {
  display: block;
}

.pal.is-demo .pal__chip {
  animation: chip-in 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.pal.is-demo .pal__list--a {
  animation: cut-out 2s steps(1, end) infinite;
}

.pal.is-demo .pal__list--b {
  animation: cut-in 2s steps(1, end) infinite;
}

.pal.is-demo .pal__list--b .pal__opt {
  animation: slide-in 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.pal.is-demo #b2 {
  animation-delay: 50ms;
}

.pal.is-demo #b3 {
  animation-delay: 100ms;
}

.pal.is-demo #b4 {
  animation-delay: 150ms;
}

@keyframes chip-in {
  0%, 16% {
    opacity: 0;
    transform: translateX(-8px);
  }
  26%, 78% {
    opacity: 1;
    transform: translateX(0);
  }
  88%, 100% {
    opacity: 0;
    transform: translateX(-8px);
  }
}
@keyframes cut-out {
  0%, 17% {
    opacity: 1;
  }
  18%, 84% {
    opacity: 0;
  }
  85%, 100% {
    opacity: 1;
  }
}
@keyframes cut-in {
  0%, 17% {
    opacity: 0;
  }
  18%, 84% {
    opacity: 1;
  }
  85%, 100% {
    opacity: 0;
  }
}
@keyframes slide-in {
  0%, 18% {
    transform: translateX(16px);
  }
  32%, 84% {
    transform: translateX(0);
  }
  85%, 100% {
    transform: translateX(16px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .pal.is-demo .pal__chip,
  .pal.is-demo .pal__list--a,
  .pal.is-demo .pal__list--b,
  .pal.is-demo .pal__list--b .pal__opt {
    animation: none !important;
  }
  .pal.is-demo .pal__list--b[hidden] {
    display: none;
  }
  .pal.is-demo .pal__chip {
    opacity: 0;
  }
}

// 실제 동작: 첫 줄을 고르면 입력칸 앞에 칩이 생기며 하위 목록으로 갈리고, 빈 입력칸에서 Backspace 를 치면 되돌아온다.
var pal = document.querySelector('.pal');
var input = document.getElementById('q');
var chip = document.getElementById('chip');
var live = document.getElementById('live');
var A = document.getElementById('list-a');
var B = document.getElementById('list-b');
var deep = false, at = -1;

function rows() { return [].slice.call((deep ? B : A).querySelectorAll('.pal__opt')); }
function paint() {
  pal.classList.remove('is-demo');
  pal.classList.toggle('is-deep', deep);
  A.hidden = deep; B.hidden = !deep;
  input.setAttribute('aria-controls', deep ? 'list-b' : 'list-a');
  live.textContent = deep ? 'Invite to team' : '';
  at = -1;
}
function move(i) {
  var r = rows();
  at = Math.max(0, Math.min(i, r.length - 1));
  r.forEach(function (o, k) { o.classList.toggle('is-at', k === at); });
  input.setAttribute('aria-activedescendant', r[at].id);
}
document.addEventListener('keydown', function (e) {
  var r = rows();
  if (e.key === 'ArrowDown' || e.key === 'ArrowUp') {
    pal.classList.remove('is-demo'); move(at + (e.key === 'ArrowDown' ? 1 : -1)); e.preventDefault();
  } else if (e.key === 'Enter' && r[at]) {
    if (!deep && at === 0) { deep = true; paint(); } else { r[at].setAttribute('aria-selected', 'true'); }
    e.preventDefault();
  } else if (e.key === 'Backspace' && deep && !input.value) {
    deep = false; paint(); input.focus({ preventScroll: true }); e.preventDefault();
  } else if (e.key === 'Escape') {
    deep = false; paint(); input.value = ''; input.focus({ preventScroll: true });
  }
});
A.querySelectorAll('.pal__opt')[0].addEventListener('click', function () { deep = true; paint(); });
chip.addEventListener('click', function () { deep = false; paint(); });

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

export type BreadcrumbPaletteProps = {
  placeholder?: string;
  commands?: string[];
  targets?: string[];
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault: () => void };
type ChangeEvt = { target: { value: string } };

export default function BreadcrumbPalette({
  placeholder = "Search commands",
  commands = ["Invite to team", "Share document", "Copy link", "Move to archive"],
  targets = ["Design team", "Engineering team", "Marketing team", "Operations team"],
  duration = 220,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: BreadcrumbPaletteProps) {
  const [deep, setDeep] = useState(false);
  const [query, setQuery] = useState("");
  const [at, setAt] = useState(-1);
  const [picked, setPicked] = useState<string | null>(null);
  const inputRef = useRef<HTMLInputElement>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  const rows = deep ? targets : commands;

  function enter() { setDeep(true); setQuery(""); setAt(-1); }
  function back() {
    setDeep(false); setQuery(""); setAt(-1);
    inputRef.current?.focus({ preventScroll: true });
  }

  return (
    <div className={styles.pal} style={vars} role="dialog" aria-modal="true" aria-label="Command palette">
      <div className={styles.bar}>
        {deep ? (
          <button className={styles.chip} type="button" onClick={back}>
            <span className={styles.chipic} aria-hidden="true">
              <svg viewBox="0 0 256 256" width="11" height="11">
                <g fill="currentColor">
                  <path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2" />
                  <path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52" />
                </g>
              </svg>
            </span>
            {commands[0]}
          </button>
        ) : null}
        <input
          ref={inputRef}
          className={styles.input}
          type="text"
          role="combobox"
          aria-expanded="true"
          aria-controls="bc-list"
          aria-activedescendant={at >= 0 ? `bc-o${at}` : undefined}
          aria-label={placeholder}
          placeholder={placeholder}
          autoComplete="off"
          value={query}
          onChange={(e: ChangeEvt) => setQuery(e.target.value)}
          onKeyDown={(e: KeyEvt) => {
            if (e.key === "ArrowDown" || e.key === "ArrowUp") {
              e.preventDefault();
              setAt((a) => Math.max(0, Math.min(a + (e.key === "ArrowDown" ? 1 : -1), rows.length - 1)));
            } else if (e.key === "Enter" && at >= 0) {
              e.preventDefault();
              if (!deep && at === 0) enter(); else setPicked(rows[at]);
            } else if (e.key === "Backspace" && deep && !query) {
              // 빈 입력칸에서의 Backspace 는 글자가 아니라 한 단계를 지운다
              e.preventDefault();
              back();
            } else if (e.key === "Escape") {
              back();
            }
          }}
        />
      </div>
      <p className={styles.live} aria-live="polite">{deep ? commands[0] : ""}</p>
      <div className={styles.box}>
        <div className={styles.list} id="bc-list" role="listbox" aria-label={deep ? commands[0] : "Command palette"}>
          {rows.map((label, i) => (
            <div
              key={label}
              id={`bc-o${i}`}
              className={`${styles.opt} ${i === at ? styles.isAt : ""}`}
              role="option"
              aria-selected={label === picked}
              tabIndex={-1}
              onMouseMove={() => setAt(i)}
              onClick={() => { if (!deep && i === 0) enter(); else setPicked(label); }}
            >
              {label}
            </div>
          ))}
        </div>
      </div>
    </div>
  );
}