02チップ削除の詰め — 残りチップ数でコンテナ幅を求め直す行

<main class="stage">
  <div class="chips" id="chips" role="list" aria-label="適用中のフィルター">
    <span class="chip" role="listitem" data-label="レディース">
      <span class="chip__label">レディース</span>
      <button class="chip__x" type="button" aria-label="レディースフィルターを解除">
        <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>
      </button>
    </span>
    <span class="chip" role="listitem" data-label="ブルー">
      <span class="chip__label">ブルー</span>
      <button class="chip__x" type="button" aria-label="ブルーフィルターを解除">
        <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>
      </button>
    </span>
    <span class="chip" role="listitem" data-label="M">
      <span class="chip__label">M</span>
      <button class="chip__x" type="button" aria-label="Mフィルターを解除">
        <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>
      </button>
    </span>
    <span class="chip" role="listitem" data-label="セール">
      <span class="chip__label">セール</span>
      <button class="chip__x" type="button" aria-label="セールフィルターを解除">
        <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>
      </button>
    </span>
  </div>
</main>

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

$duration: $dur-base;
$easing: $ease-spring;
$color: $subject-ink;

@include stage($stage-yellow);

.chips {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: $sp-2;
  flex-wrap: nowrap;
  overflow: hidden;
  transition: width $duration $easing;
}

.chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: $sp-1;
  padding: $sp-2 $sp-3;
  border-radius: $r-pill;
  background: $color;
  white-space: nowrap;
}

.chip__label {
  color: $stage-paper;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.3;
}

.chip__x {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba($stage-paper, .18);
  color: $stage-paper;
  cursor: pointer;
}

@media (max-width: 340px) {
  .chip { padding: $sp-1 $sp-2; gap: $sp-1; }
  .chip__label { font-size: 11px; }
  .chip__x { width: 14px; height: 14px; }
  .chips { gap: $sp-1; }
}

@media (prefers-reduced-motion: reduce) {
  .chips { 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);
}

.chips {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  overflow: hidden;
  transition: width 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #17141a;
  white-space: nowrap;
}

.chip__label {
  color: #ffffff;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.3;
}

.chip__x {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  cursor: pointer;
}

@media (max-width: 340px) {
  .chip {
    padding: 4px 8px;
    gap: 4px;
  }
  .chip__label {
    font-size: 11px;
  }
  .chip__x {
    width: 14px;
    height: 14px;
  }
  .chips {
    gap: 4px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .chips {
    transition: none;
  }
}

// 칩 하나를 지우면 남은 칩들의 실측 폭(getBoundingClientRect)과 사이 간격(gap)을 다시 더해 컨테이너 폭을 그 값으로 옮긴다(transition).
// 실사용 클릭 리스너 있음 + 캡처용으로 같은 제거·추가 함수를 2초 주기로 되풀이한다.
(function () {
  var GAP_PX = 8;
  var row = document.getElementById('chips');
  if (!row) return;

  function recompute() {
    var chips = row.querySelectorAll('.chip');
    var total = 0;
    chips.forEach(function (chip, i) {
      total += chip.getBoundingClientRect().width;
      if (i > 0) total += GAP_PX;
    });
    row.style.width = total + 'px';
  }

  function buildChip(label) {
    var chip = document.createElement('span');
    chip.className = 'chip';
    chip.setAttribute('role', 'listitem');
    chip.dataset.label = label;
    var text = document.createElement('span');
    text.className = 'chip__label';
    text.textContent = label;
    var btn = document.createElement('button');
    btn.className = 'chip__x';
    btn.type = 'button';
    btn.setAttribute('aria-label', label + ' フィルター解除');
    btn.innerHTML = '<svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>';
    chip.appendChild(text);
    chip.appendChild(btn);
    return chip;
  }

  function removeChip(chip) {
    if (!chip) return null;
    var label = chip.dataset.label || '';
    chip.remove();
    recompute();
    return label;
  }

  function addChip(label) {
    var chip = buildChip(label);
    row.appendChild(chip);
    recompute();
  }

  row.addEventListener('click', function (e) {
    var btn = e.target.closest('.chip__x');
    if (!btn) return;
    removeChip(btn.closest('.chip'));
  });

  requestAnimationFrame(recompute);

  // 자동 시연: 마지막 칩을 지웠다가 되돌리는 2초 주기 반복 (실제 리스너와 같은 함수를 재사용)
  (function loop() {
    setTimeout(function () {
      var last = row.querySelector('.chip:last-child');
      var label = removeChip(last);
      setTimeout(function () {
        if (label) addChip(label);
        setTimeout(loop, 700);
      }, 650);
    }, 350);
  })();
})();

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

// 칩 하나를 지우면 남은 칩들의 실측 폭(getBoundingClientRect)과 사이 간격(gap)을 다시 더해 컨테이너 폭을 그 값으로 옮긴다(transition).
// 실사용 클릭 리스너 있음 + 같은 제거·추가 함수를 2초 주기로 되풀이하는 자동 시연을 함께 돈다.
const GAP_PX = 8;
const X_ICON_SVG =
  '<svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true"><g fill="currentColor"><path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z"/></g></svg>';

export default function ChipRemoveCollapse() {
  const rowRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const row = rowRef.current;
    if (!row) return;

    let alive = true;

    function recompute() {
      const chips = row!.querySelectorAll<HTMLElement>("." + styles.chip);
      let total = 0;
      chips.forEach((chip, i) => {
        total += chip.getBoundingClientRect().width;
        if (i > 0) total += GAP_PX;
      });
      row!.style.width = total + "px";
    }

    function buildChip(label: string) {
      const chip = document.createElement("span");
      chip.className = styles.chip;
      chip.setAttribute("role", "listitem");
      chip.dataset.label = label;
      const text = document.createElement("span");
      text.className = styles.chip__label;
      text.textContent = label;
      const btn = document.createElement("button");
      btn.className = styles.chip__x;
      btn.type = "button";
      btn.setAttribute("aria-label", label + " 필터 제거");
      btn.innerHTML = X_ICON_SVG;
      chip.appendChild(text);
      chip.appendChild(btn);
      return chip;
    }

    function removeChip(chip: HTMLElement | null) {
      if (!chip) return null;
      const label = chip.dataset.label || "";
      chip.remove();
      recompute();
      return label;
    }

    function addChip(label: string) {
      const chip = buildChip(label);
      row!.appendChild(chip);
      recompute();
    }

    function onClick(e: MouseEvent) {
      const target = e.target as Element | null;
      if (!target) return;
      const btn = target.closest<HTMLElement>("." + styles.chip__x);
      if (!btn) return;
      removeChip(btn.closest<HTMLElement>("." + styles.chip));
    }

    row.addEventListener("click", onClick);
    const rafId = requestAnimationFrame(recompute);

    const timers: number[] = [];
    (function loop() {
      const t1 = window.setTimeout(() => {
        if (!alive) return;
        const last = row!.querySelector<HTMLElement>("." + styles.chip + ":last-child");
        const label = removeChip(last);
        const t2 = window.setTimeout(() => {
          if (!alive) return;
          if (label) addChip(label);
          const t3 = window.setTimeout(loop, 700);
          timers.push(t3);
        }, 650);
        timers.push(t2);
      }, 350);
      timers.push(t1);
    })();

    return () => {
      alive = false;
      row.removeEventListener("click", onClick);
      cancelAnimationFrame(rafId);
      timers.forEach((t) => window.clearTimeout(t));
    };
  }, []);

  return (
    <main className={styles.stage}>
      <div ref={rowRef} className={styles.chips} role="list" aria-label="적용된 필터">
        <span className={styles.chip} role="listitem" data-label="여성">
          <span className={styles.chip__label}>여성</span>
          <button className={styles.chip__x} type="button" aria-label="여성 필터 제거">
            <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true">
              <g fill="currentColor">
                <path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z" />
              </g>
            </svg>
          </button>
        </span>
        <span className={styles.chip} role="listitem" data-label="블루">
          <span className={styles.chip__label}>블루</span>
          <button className={styles.chip__x} type="button" aria-label="블루 필터 제거">
            <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true">
              <g fill="currentColor">
                <path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z" />
              </g>
            </svg>
          </button>
        </span>
        <span className={styles.chip} role="listitem" data-label="M">
          <span className={styles.chip__label}>M</span>
          <button className={styles.chip__x} type="button" aria-label="M 필터 제거">
            <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true">
              <g fill="currentColor">
                <path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z" />
              </g>
            </svg>
          </button>
        </span>
        <span className={styles.chip} role="listitem" data-label="세일">
          <span className={styles.chip__label}>세일</span>
          <button className={styles.chip__x} type="button" aria-label="세일 필터 제거">
            <svg viewBox="0 0 256 256" width="12" height="12" aria-hidden="true">
              <g fill="currentColor">
                <path d="M205.66 194.34a8 8 0 0 1-11.32 11.32L128 139.31l-66.34 66.35a8 8 0 0 1-11.32-11.32L116.69 128L50.34 61.66a8 8 0 0 1 11.32-11.32L128 116.69l66.34-66.35a8 8 0 0 1 11.32 11.32L139.31 128Z" />
              </g>
            </svg>
          </button>
        </span>
      </div>
    </main>
  );
}