05Chip filter bar

<main class="stage">
  <div class="fl">
    <div class="fl__row">
      <button class="fl__chip is-demo" type="button" aria-pressed="false">In progress</button>
      <button class="fl__chip is-demo" type="button" aria-pressed="false">Done</button>
      <button class="fl__chip is-demo" type="button" aria-pressed="false">On hold</button>
      <button class="fl__chip is-demo" type="button" aria-pressed="false">Urgent</button>
      <button class="fl__clear" type="button" hidden>Clear all ✕</button>
    </div>
    <p class="fl__count"><span class="fl__count-num">0</span> selected</p>
  </div>
</main>

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

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

@include stage($stage-orange);

.fl {
  box-sizing: border-box;
  width: min(400px, 90vw);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}
.fl__row { display: flex; flex-wrap: wrap; gap: $sp-2; align-items: center; }
.fl__chip {
  box-sizing: border-box;
  border: 1px solid rgba(23, 20, 26, .4);
  background: transparent;
  color: $subject-ink;
  padding: $sp-2 $sp-4;
  border-radius: $r-pill;
  font: inherit; font-weight: 700; font-size: 12px;
  cursor: pointer;
  transition: background $duration $easing, border-color $duration $easing, transform $duration $easing;
}
.fl__chip[aria-pressed="true"] {
  background: $subject-cream;
  border-color: $subject-cream;
  color: $subject-orange-deep;
}   // 크림 면 위 deep 5.04:1
.fl__clear {
  border: 0; background: transparent; cursor: pointer;
  color: rgba(23, 20, 26, .8);
  font: inherit; font-weight: 700; font-size: 11px;
  text-decoration: underline;
  padding: $sp-2 $sp-1;
}
.fl__count { margin: $sp-3 0 0; font-size: 12px; font-weight: 600; color: $subject-ink; }   // 주황 면 위 알파 잉크 .72 는 3.76:1 — 알파를 빼야 5.50:1 (패턴 ①·주황 면 예외)
.fl__count-num { color: $subject-ink; font-weight: 800; }

// ── 자동 루프: 칩이 하나씩 순서대로 눌렸다 풀린다 ──────────────
.fl__chip.is-demo { animation: fl-press 2s $easing infinite; }
.fl__chip.is-demo:nth-child(1) { animation-delay: 0s; }
.fl__chip.is-demo:nth-child(2) { animation-delay: .3s; }
.fl__chip.is-demo:nth-child(3) { animation-delay: .6s; }
.fl__chip.is-demo:nth-child(4) { animation-delay: .9s; }
@keyframes fl-press {
  0%, 100% { transform: scale(1); background: transparent; border-color: rgba(23, 20, 26, .4); color: $subject-ink; }
  20%      { transform: scale(1.06); background: $subject-cream; border-color: $subject-cream; color: $subject-orange-deep; }
  40%      { transform: scale(1); background: $subject-cream; border-color: $subject-cream; color: $subject-orange-deep; }
}

@media (max-width: 340px) {
  .fl__chip { padding: $sp-1 $sp-3; font-size: 11px; }
}

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

.fl {
  box-sizing: border-box;
  width: min(400px, 90vw);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.fl__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.fl__chip {
  box-sizing: border-box;
  border: 1px solid rgba(23, 20, 26, 0.4);
  background: transparent;
  color: #17141a;
  padding: 8px 16px;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  transition: background 220ms cubic-bezier(0.2, 1.4, 0.4, 1), border-color 220ms cubic-bezier(0.2, 1.4, 0.4, 1), transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.fl__chip[aria-pressed=true] {
  background: #fff7e6;
  border-color: #fff7e6;
  color: #c93000;
}

.fl__clear {
  border: 0;
  background: transparent;
  cursor: pointer;
  color: rgba(23, 20, 26, 0.8);
  font: inherit;
  font-weight: 700;
  font-size: 11px;
  text-decoration: underline;
  padding: 8px 4px;
}

.fl__count {
  margin: 12px 0 0;
  font-size: 12px;
  font-weight: 600;
  color: #17141a;
}

.fl__count-num {
  color: #17141a;
  font-weight: 800;
}

.fl__chip.is-demo {
  animation: fl-press 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.fl__chip.is-demo:nth-child(1) {
  animation-delay: 0s;
}

.fl__chip.is-demo:nth-child(2) {
  animation-delay: 0.3s;
}

.fl__chip.is-demo:nth-child(3) {
  animation-delay: 0.6s;
}

.fl__chip.is-demo:nth-child(4) {
  animation-delay: 0.9s;
}

@keyframes fl-press {
  0%, 100% {
    transform: scale(1);
    background: transparent;
    border-color: rgba(23, 20, 26, 0.4);
    color: #17141a;
  }
  20% {
    transform: scale(1.06);
    background: #fff7e6;
    border-color: #fff7e6;
    color: #c93000;
  }
  40% {
    transform: scale(1);
    background: #fff7e6;
    border-color: #fff7e6;
    color: #c93000;
  }
}
@media (max-width: 340px) {
  .fl__chip {
    padding: 4px 12px;
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .fl__chip.is-demo {
    animation: none !important;
  }
  .fl__chip {
    transition: none;
  }
}

// 실제 동작: 칩을 누르면 실제로 눌린 상태로 바뀌고 개수가 갱신되며, 하나 이상이면 '전체 해제'가 나타난다.
var chips = document.querySelectorAll('.fl__chip');
var clearBtn = document.querySelector('.fl__clear');
var countEl = document.querySelector('.fl__count-num');
function refresh() {
  var n = document.querySelectorAll('.fl__chip[aria-pressed="true"]').length;
  countEl.textContent = String(n);
  clearBtn.hidden = n === 0;
}
chips.forEach(function (c) {
  c.addEventListener('click', function () {
    c.classList.remove('is-demo');
    var on = c.getAttribute('aria-pressed') === 'true';
    c.setAttribute('aria-pressed', String(!on));
    refresh();
  });
});
clearBtn.addEventListener('click', function () {
  chips.forEach(function (c) { c.setAttribute('aria-pressed', 'false'); });
  refresh();
});

import { useState } from "react";
import type { CSSProperties } from "react";
import styles from "./Filters.module.scss";

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

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

const CHIPS = ["진행중", "완료", "보류", "긴급"];

export default function Filters({ duration = 220, easing = "cubic-bezier(.2,1.4,.4,1)", color = "#2f6df6" }: FiltersProps) {
  const [selected, setSelected] = useState<Set<string>>(new Set());
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  function toggle(chip: string) {
    setSelected((s) => {
      const next = new Set(s);
      next.has(chip) ? next.delete(chip) : next.add(chip);
      return next;
    });
  }

  return (
    <div className={styles.fl} style={vars}>
      <div className={styles.row}>
        {CHIPS.map((chip) => (
          <button
            key={chip}
            type="button"
            className={styles.chip}
            aria-pressed={selected.has(chip)}
            onClick={() => toggle(chip)}
          >
            {chip}
          </button>
        ))}
        {selected.size > 0 && (
          <button type="button" className={styles.clear} onClick={() => setSelected(new Set())}>
            전체 해제 ✕
          </button>
        )}
      </div>
      <p className={styles.count}><span className={styles.countNum}>{selected.size}</span>개 선택됨</p>
    </div>
  );
}