08Tiện ích spin

<main class="stage">
  <div class="row">
    <span class="ring ring--fast" aria-hidden="true"></span>
    <span class="ring ring--slow" aria-hidden="true"></span>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1000ms;   // 기본 animate-spin 과 같은 1초
$easing: linear;
$color: $subject-blue;

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

.row {
  display: flex;
  align-items: center;
  gap: $sp-8;
}

.ring {
  box-sizing: border-box;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 5px solid rgba($subject-ink, .14);
}

// 기본 --animate-spin 그대로 (1초 linear)
.ring--fast {
  border-top-color: $color;
  animation: spin $duration $easing infinite;
}

// 확장한 --animate-spin-slow (3초 linear) — 같은 spin 키프레임을 속도만 다르게 공유
.ring--slow {
  border-top-color: $subject-ink;
  animation: spin 3000ms $easing infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .ring--fast, .ring--slow { animation: none; }
}

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);
}

.row {
  display: flex;
  align-items: center;
  gap: 32px;
}

.ring {
  box-sizing: border-box;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 5px solid rgba(23, 20, 26, 0.14);
}

.ring--fast {
  border-top-color: #2f6df6;
  animation: spin 1000ms linear infinite;
}

.ring--slow {
  border-top-color: #17141a;
  animation: spin 3000ms linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ring--fast, .ring--slow {
    animation: none;
  }
}

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

export type SpinUtilRingsProps = {
  /** 기본 animate-spin 속도, ms */
  duration?: number;
  /** --animate-spin-slow 속도, ms */
  slowDuration?: number;
  easing?: string;
  color?: string;
};

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

export default function SpinUtilRings({
  duration = 1000,
  slowDuration = 3000,
  easing = "linear",
  color = "#2f6df6",
}: SpinUtilRingsProps) {
  const vars: Vars = {
    "--duration": `${duration}ms`,
    "--slow-duration": `${slowDuration}ms`,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.row} style={vars}>
      <span className={styles.ring} aria-hidden="true" />
      <span className={`${styles.ring} ${styles["ring--slow"]}`} aria-hidden="true" />
    </div>
  );
}