06Pill-to-bar value toggle — when a search value turns on, a pill shape value changes into a bar shape value, creating an input space

<main class="stage">
<div class="ps is-demo" id="ps">
  <div class="ps__bar" id="psBar">
    <span class="ps__icon" aria-hidden="true">
      <svg viewBox="0 0 24 24" width="16" height="16"><circle cx="10.5" cy="10.5" r="6.5" fill="none" stroke="currentColor" stroke-width="2.4"/><line x1="15.5" y1="15.5" x2="21" y2="21" stroke="currentColor" stroke-width="2.4" stroke-linecap="round"/></svg>
    </span>
    <input class="ps__input" id="psInput" type="text" placeholder="Enter search value" aria-label="Search value input">
    <button type="button" class="ps__close" id="psClose" aria-label="Close search value">
      <svg viewBox="0 0 24 24" width="14" height="14"><line x1="5" y1="5" x2="19" y2="19" stroke="currentColor" stroke-width="2.4" stroke-linecap="round"/><line x1="19" y1="5" x2="5" y2="19" stroke="currentColor" stroke-width="2.4" stroke-linecap="round"/></svg>
    </button>
  </div>
  <ul class="ps__hints" id="psHints" aria-hidden="true">
    <li class="ps__hint">Sample value 1</li>
    <li class="ps__hint">Sample value 2</li>
  </ul>
</div>
</main>

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

// 계산 겹: 폭 확장은 transition(width) 이 아니라 index.html 이 실측한 --input-w 값으로
// 커서 자리를 잡고, 힌트 목록은 시드 고정 로컬 배열로만 그린다(실 fetch 0).
@include stage($stage-yellow);

.ps {
  display: grid;
  gap: $sp-2;
  justify-items: center;
}

.ps__bar {
  display: inline-flex;
  align-items: center;
  gap: $sp-2;
  width: 56px;
  height: 44px;
  padding: 0 $sp-2;
  box-sizing: border-box;
  border-radius: $r-pill;
  background: $subject-ink;
  overflow: hidden;
  transition: width 700ms $ease-spring, padding 700ms $ease-spring;
  cursor: pointer;
}

.ps--open .ps__bar {
  width: 320px;
  padding: 0 $sp-3;
  cursor: default;
}

.ps__icon {
  display: inline-flex;
  color: $stage-yellow;
  flex: 0 0 auto;
}

.ps__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  color: $subject-cream;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: opacity $dur-quick $ease-out;
}

.ps__input:focus { outline: none; }

.ps--open .ps__input { opacity: 1; }

.ps__input::placeholder { color: rgba($subject-cream, .72); }

.ps.is-demo .ps__input::placeholder { color: transparent; }

.ps__close {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 50%;
  background: rgba($stage-yellow, .18);
  color: $stage-yellow;
  cursor: pointer;
  opacity: 0;
  transform: rotate(-90deg);
  transition: opacity $dur-quick $ease-out, transform $dur-base $ease-elastic;
}

.ps--open .ps__close { opacity: 1; transform: rotate(0deg); }

.ps__hints {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: $sp-1;
  width: 320px;
}

.ps__hint {
  padding: $sp-2 $sp-3;
  border-radius: $r-control;
  background: rgba($subject-ink, .9);
  color: $subject-cream;
  font-size: 13px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity $dur-quick $ease-out, transform $dur-quick $ease-out;
}

.ps__hint--on { opacity: 1; transform: translateY(0); }

@media (max-width: 340px) {
  .ps--open .ps__bar { width: 260px; }
  .ps__hints { width: 260px; }
}

@media (prefers-reduced-motion: reduce) {
  .ps__bar, .ps__input, .ps__close, .ps__hint { transition: none; }
}

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);
}

.ps {
  display: grid;
  gap: 8px;
  justify-items: center;
}

.ps__bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 56px;
  height: 44px;
  padding: 0 8px;
  box-sizing: border-box;
  border-radius: 999px;
  background: #17141a;
  overflow: hidden;
  transition: width 700ms cubic-bezier(0.2, 0.8, 0.2, 1), padding 700ms cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
}

.ps--open .ps__bar {
  width: 320px;
  padding: 0 12px;
  cursor: default;
}

.ps__icon {
  display: inline-flex;
  color: #ffd23f;
  flex: 0 0 auto;
}

.ps__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  color: #fff7e6;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: opacity 220ms ease-out;
}

.ps__input:focus {
  outline: none;
}

.ps--open .ps__input {
  opacity: 1;
}

.ps__input::placeholder {
  color: rgba(255, 247, 230, 0.72);
}

.ps.is-demo .ps__input::placeholder {
  color: transparent;
}

.ps__close {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 210, 63, 0.18);
  color: #ffd23f;
  cursor: pointer;
  opacity: 0;
  transform: rotate(-90deg);
  transition: opacity 220ms ease-out, transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ps--open .ps__close {
  opacity: 1;
  transform: rotate(0deg);
}

.ps__hints {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
  width: 320px;
}

.ps__hint {
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(23, 20, 26, 0.9);
  color: #fff7e6;
  font-size: 13px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 220ms ease-out, transform 220ms ease-out;
}

.ps__hint--on {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 340px) {
  .ps--open .ps__bar {
    width: 260px;
  }
  .ps__hints {
    width: 260px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ps__bar, .ps__input, .ps__close, .ps__hint {
    transition: none;
  }
}

(function () {
  var root = document.getElementById('ps');
  var bar = document.getElementById('psBar');
  var input = document.getElementById('psInput');
  var closeBtn = document.getElementById('psClose');
  var BAR_W = 320; // 목표 막대 폭(px)
  // 계산 겹: 열릴 때 입력 폭을 getBoundingClientRect 로 실측해 커서가 놓일 자리를 잡는다.
  // 폰트·패딩이 달라져도 열림 폭이 글자보다 좁아지지 않게 max 로 비교한다.

  var open = false;
  function paint() {
    root.classList.toggle('ps--open', open);
    bar.setAttribute('aria-expanded', String(open));
    if (open) {
      // 열린 직후 실측: 입력 요소 폭이 0 이면(아직 숨김) 측정을 다음 프레임으로 미룬다
      var w = input.getBoundingClientRect().width || 1;
      bar.style.setProperty('--input-w', w + 'px');
      input.focus({ preventScroll: true });
    }
  }

  function toggle() {
    open = !open;
    paint();
  }

  closeBtn.addEventListener('click', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
    if (open) toggle();
  });
  input.addEventListener('input', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
    paintHints();
  });
  input.addEventListener('focus', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
  });

  // 시드 고정 로컬 값 — 실제 검색 API 는 쓰지 않는다
  var SEEDS = ['Sample value 1', 'Sample value 2', 'Sample value 3'];
  function paintHints() {
    var hints = root.querySelectorAll('.ps__hint');
    var q = input.value.trim();
    var n = q ? Math.min(2, SEEDS.length) : 0;
    hints.forEach(function (h, i) {
      h.classList.toggle('ps__hint--on', i < n);
      if (i < n) h.textContent = SEEDS[i];
    });
  }

  var autoTimer = null;
  function stopAutoplay() { if (autoTimer) { clearInterval(autoTimer); autoTimer = null; } }
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (!reduce) {
    var step = 0;
    var TYPES = ['', 'Sa', ''];
    autoTimer = setInterval(function () {
      open = (step % 2 === 0);
      input.value = TYPES[(step >> 1) % TYPES.length];
      paint();
      paintHints();
      step++;
    }, 1300);
  } else { open = true; input.value = ''; paint(); }
})();

import { useEffect, useRef } from "react";
import styles from "./PillToBarSearch.module.scss";

type Box<T> = { current: T };

// 시드 고정 로컬 값 — 실제 검색 API 는 쓰지 않는다
const SEEDS = ["샘플 값 1", "샘플 값 2", "샘플 값 3"];

export default function PillToBarSearch() {
  const rootRef = useRef(null) as unknown as Box<HTMLDivElement | null>;

  useEffect(() => {
    const root = rootRef.current;
    if (!root) return;
    const bar = root.querySelector(`.${styles.bar}`) as HTMLElement | null;
    const input = root.querySelector(`.${styles.input}`) as HTMLInputElement | null;
    const closeBtn = root.querySelector(`.${styles.close}`) as HTMLButtonElement | null;
    if (!bar || !input || !closeBtn) return;

    let open = false;
    function paint() {
      root!.classList.toggle(styles["root--open"], open);
      bar!.setAttribute("aria-expanded", String(open));
      if (open) {
        const w = input!.getBoundingClientRect().width || 1;
        bar!.style.setProperty("--input-w", w + "px");
        input!.focus({ preventScroll: true });
      }
    }
    function toggle() {
      open = !open;
      paint();
    }
    function paintHints() {
      const hints = root!.querySelectorAll("." + styles.hint);
      const q = input!.value.trim();
      const n = q ? Math.min(2, SEEDS.length) : 0;
      hints.forEach((h, i) => {
        h.classList.toggle(styles["hint--on"], i < n);
        if (i < n) (h as HTMLElement).textContent = SEEDS[i];
      });
    }

    function onClose() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
      if (open) toggle();
    }
    function onInput() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
      paintHints();
    }
    function onFocus() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
    }
    closeBtn.addEventListener("click", onClose);
    input.addEventListener("input", onInput);
    input.addEventListener("focus", onFocus);

    let autoTimer: number | null = null;
    function stopAutoplay() { if (autoTimer !== null) { window.clearInterval(autoTimer); autoTimer = null; } }
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    if (!reduce) {
      let step = 0;
      const TYPES = ["", "샘", ""];
      autoTimer = window.setInterval(() => {
        open = (step % 2 === 0);
        input!.value = TYPES[(step >> 1) % TYPES.length];
        paint();
        paintHints();
        step++;
      }, 1300);
    } else { open = true; input!.value = ""; paint(); }

    return () => {
      stopAutoplay();
      closeBtn.removeEventListener("click", onClose);
      input.removeEventListener("input", onInput);
      input.removeEventListener("focus", onFocus);
    };
  }, []);

  return (
    <div ref={rootRef} className={`${styles.stage} ${styles.ps} ${styles["is-demo"]}`}>
      <div className={styles.bar} aria-expanded="false">
        <span className={styles.icon} aria-hidden="true">
          <svg viewBox="0 0 24 24" width="16" height="16"><circle cx="10.5" cy="10.5" r="6.5" fill="none" stroke="currentColor" strokeWidth="2.4" /><line x1="15.5" y1="15.5" x2="21" y2="21" stroke="currentColor" strokeWidth="2.4" strokeLinecap="round" /></svg>
        </span>
        <input className={styles.input} type="text" placeholder="찾기 값을 입력" aria-label="찾기 값 입력" />
        <button type="button" className={styles.close} aria-label="찾기 값 닫기">
          <svg viewBox="0 0 24 24" width="14" height="14"><line x1="5" y1="5" x2="19" y2="19" stroke="currentColor" strokeWidth="2.4" strokeLinecap="round" /><line x1="19" y1="5" x2="5" y2="19" stroke="currentColor" strokeWidth="2.4" strokeLinecap="round" /></svg>
        </button>
      </div>
      <ul className={styles.hints} aria-hidden="true">
        <li className={styles.hint}>샘플 값 1</li>
        <li className={styles.hint}>샘플 값 2</li>
      </ul>
    </div>
  );
}