09Chip toggle

<main class="stage">
  <div class="chips is-demo">
    <label class="chip">
      <input type="checkbox" class="sr-input" checked>
      <span class="chip__fill" aria-hidden="true"></span>
      <span class="chip__label">Free shipping</span>
    </label>
    <label class="chip">
      <input type="checkbox" class="sr-input">
      <span class="chip__fill" aria-hidden="true"></span>
      <span class="chip__label">Ships today</span>
    </label>
    <label class="chip">
      <input type="checkbox" class="sr-input">
      <span class="chip__fill" aria-hidden="true"></span>
      <span class="chip__label">Best seller</span>
    </label>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────
$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue-deep;

// ── 데모 무대 ───────────────────────────────
@include stage($stage-ink);

.sr-input {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.chips { display: flex; flex-wrap: wrap; gap: clamp(6px, 2vw, 10px); justify-content: center; }
.chip {
  position: relative; overflow: hidden; display: inline-flex; align-items: center;
  padding: 8px clamp(12px, 3.6vw, 18px); border-radius: $r-pill; border: 1.5px solid rgba($subject-cream, .35);
  cursor: pointer; transition: transform 120ms $ease-out;
}
.chip:active { transform: scale(.96); }
.chip__fill {
  position: absolute; inset: 0; background: $color; z-index: 0;
  transform: scaleX(0); transform-origin: center; transition: transform $duration $easing;
}
.sr-input:checked ~ .chip__fill { transform: scaleX(1); }
.sr-input:focus-visible ~ .chip__fill { box-shadow: inset 0 0 0 2px rgba($subject-cream, .6); }
.chip__label {
  position: relative; z-index: 1; font-weight: 600; font-size: clamp(12px, 3.4vw, 13px); line-height: 1; font-family: inherit; color: $subject-cream;
  transition: color $duration $easing;
}
.sr-input:checked ~ .chip__label { color: $subject-cream; }

@media (prefers-reduced-motion: reduce) {
  // 접근성: 움직임 줄이기 설정이면 트랜지션을 즉시 끝낸다
  .chip__fill, .chip__label, .chip { transition-duration: 1ms !important; }
}

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);
}

.sr-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(6px, 2vw, 10px);
  justify-content: center;
}

.chip {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  padding: 8px clamp(12px, 3.6vw, 18px);
  border-radius: 999px;
  border: 1.5px solid rgba(255, 247, 230, 0.35);
  cursor: pointer;
  transition: transform 120ms ease-out;
}

.chip:active {
  transform: scale(0.96);
}

.chip__fill {
  position: absolute;
  inset: 0;
  background: #0a4fe8;
  z-index: 0;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.sr-input:checked ~ .chip__fill {
  transform: scaleX(1);
}

.sr-input:focus-visible ~ .chip__fill {
  box-shadow: inset 0 0 0 2px rgba(255, 247, 230, 0.6);
}

.chip__label {
  position: relative;
  z-index: 1;
  font-weight: 600;
  font-size: clamp(12px, 3.4vw, 13px);
  line-height: 1;
  font-family: inherit;
  color: #fff7e6;
  transition: color 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.sr-input:checked ~ .chip__label {
  color: #fff7e6;
}

@media (prefers-reduced-motion: reduce) {
  .chip__fill, .chip__label, .chip {
    transition-duration: 1ms !important;
  }
}

// .is-demo 데모용 자동 토글. 실제로는 클릭이 :checked 를 바꾼다 (4줄)
document.querySelectorAll('.is-demo .sr-input').forEach(function (el) {
  var t = function () { el.checked = !el.checked; };
  t(); setInterval(t, 600);
});

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

export type Chip = { value: string; label: string };
export type ChipToggleProps = {
  chips?: Chip[];
  defaultSelected?: string[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function ChipToggle({
  chips = [
    { value: "free-shipping", label: "Free shipping" },
    { value: "ships-today", label: "Ships today" },
    { value: "best", label: "Best seller" },
  ],
  defaultSelected = ["free-shipping"],
  duration = 220,
  easing = "cubic-bezier(.2,1.4,.4,1)",
  color = "#0a4fe8",
}: ChipToggleProps) {
  const [selected, setSelected] = useState<string[]>(defaultSelected);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  const toggle = (v: string) => {
    setSelected((prev) => (prev.includes(v) ? prev.filter((x) => x !== v) : [...prev, v]));
  };

  return (
    <div className={styles.chips} style={vars}>
      {chips.map((c) => {
        const on = selected.includes(c.value);
        return (
          <label className={styles.chip} key={c.value}>
            <input
              type="checkbox"
              className={styles.srInput}
              checked={on}
              onChange={() => toggle(c.value)}
            />
            <span className={styles.fill} data-checked={on} aria-hidden="true" />
            <span className={styles.label} data-checked={on}>{c.label}</span>
          </label>
        );
      })}
    </div>
  );
}