04Switch-style checkbox

<main class="stage">
  <label class="switch is-demo">
    <input type="checkbox" class="sr-input">
    <span class="switch__track" aria-hidden="true">
      <span class="switch__fill"></span>
      <span class="switch__knob">
        <svg viewBox="0 0 24 24" class="switch__icon switch__icon--on"><path d="M18 8a6 6 0 1 1-6-6 7 7 0 0 0 6 6Z" /></svg>
        <svg viewBox="0 0 24 24" class="switch__icon switch__icon--off"><circle cx="12" cy="12" r="3.2" /><path d="M12 3v3M12 18v3M3 12h3M18 12h3M5.6 5.6l2.1 2.1M16.3 16.3l2.1 2.1M5.6 18.4l2.1-2.1M16.3 7.7l2.1-2.1" stroke-width="1.6" stroke-linecap="round" /></svg>
      </span>
    </span>
    <span class="switch__text">Mute notifications</span>
  </label>
</main>

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

// ── 변수 3개 ──────────────────────────────
$duration: $dur-base;
$easing: $ease-out;
$color: $subject-blue;

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

.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;
}

.switch { display: inline-flex; align-items: center; gap: 12px; cursor: pointer;
          font-weight: 600; font-size: clamp(14px, 4vw, 16px); line-height: 1.3; font-family: inherit; color: $subject-ink; }
.switch__track {
  position: relative; width: 56px; height: 28px; border-radius: $r-pill;
  background: rgba($subject-ink, .14); overflow: hidden; display: grid; place-items: center;
}
.switch__fill {
  position: absolute; inset: 0; background: $color;
  clip-path: circle(0% at 50% 50%); transition: clip-path $duration $easing;
}
.sr-input:checked ~ .switch__track .switch__fill { clip-path: circle(75% at 50% 50%); }
.sr-input:focus-visible ~ .switch__track { box-shadow: 0 0 0 3px rgba($subject-blue, .35); }
.switch__knob {
  position: relative; z-index: 1; width: 22px; height: 22px; border-radius: 50%;
  background: #fff; display: grid; place-items: center; box-shadow: $shadow-press;
}
.switch__icon {
  position: absolute; width: 13px; height: 13px; fill: none; stroke: $subject-ink; stroke-width: 1.6;
  transition: opacity $duration $easing, transform $duration $easing;
}
.switch__icon--on { opacity: 0; transform: scale(.6); }
.switch__icon--off { opacity: 1; transform: scale(1); }
.sr-input:checked ~ .switch__track .switch__icon--on { opacity: 1; transform: scale(1); }
.sr-input:checked ~ .switch__track .switch__icon--off { opacity: 0; transform: scale(.6); }

@media (prefers-reduced-motion: reduce) {
  // 접근성: 움직임 줄이기 설정이면 트랜지션을 즉시 끝낸다
  .switch__fill, .switch__icon { 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: #ffffff;
  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;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-weight: 600;
  font-size: clamp(14px, 4vw, 16px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.switch__track {
  position: relative;
  width: 56px;
  height: 28px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.14);
  overflow: hidden;
  display: grid;
  place-items: center;
}

.switch__fill {
  position: absolute;
  inset: 0;
  background: #2f6df6;
  clip-path: circle(0% at 50% 50%);
  transition: clip-path 300ms ease-out;
}

.sr-input:checked ~ .switch__track .switch__fill {
  clip-path: circle(75% at 50% 50%);
}

.sr-input:focus-visible ~ .switch__track {
  box-shadow: 0 0 0 3px rgba(47, 109, 246, 0.35);
}

.switch__knob {
  position: relative;
  z-index: 1;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.switch__icon {
  position: absolute;
  width: 13px;
  height: 13px;
  fill: none;
  stroke: #17141a;
  stroke-width: 1.6;
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

.switch__icon--on {
  opacity: 0;
  transform: scale(0.6);
}

.switch__icon--off {
  opacity: 1;
  transform: scale(1);
}

.sr-input:checked ~ .switch__track .switch__icon--on {
  opacity: 1;
  transform: scale(1);
}

.sr-input:checked ~ .switch__track .switch__icon--off {
  opacity: 0;
  transform: scale(0.6);
}

@media (prefers-reduced-motion: reduce) {
  .switch__fill, .switch__icon {
    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, ChangeEvent } from "react";
import styles from "./SwitchLikeCheckbox.module.scss";

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

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

export default function SwitchLikeCheckbox({
  label = "Mute notifications",
  duration = 300,
  easing = "ease-out",
  color = "#2f6df6",
}: SwitchLikeCheckboxProps) {
  const [checked, setChecked] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <label className={styles.switch} style={vars}>
      <input
        type="checkbox"
        className={styles.srInput}
        checked={checked}
        onChange={(e: ChangeEvent<HTMLInputElement>) => setChecked(e.target.checked)}
      />
      <span className={styles.track} aria-hidden="true">
        <span className={styles.fill} />
        <span className={styles.knob}>{checked ? "●" : "○"}</span>
      </span>
      <span>{label}</span>
    </label>
  );
}