02ストライプアニメーション

<main class="stage">
  <div class="track" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="62" aria-label="同期中">
    <div class="bar is-demo"></div>
  </div>
  <p class="cap">同期中</p>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1s;                                    // 줄무늬가 한 칸 흐르는 시간
$easing: linear;
$color: $subject-ink;                             // 줄무늬 색

@include stage($stage-yellow);

.track {
  position: relative;
  width: clamp(200px, 58vw, 280px);
  height: 16px;
  border-radius: $r-pill;
  background: rgba(23, 20, 26, .14);
  overflow: hidden;
}
// 값은 62% 로 고정, 줄무늬만 background-position 으로 흐른다 (026 의 배경 애니메이션과 같은 예외 — 레이아웃이 아니라 페인트만 다시 한다)
.bar {
  position: absolute;
  inset: 0;
  width: 62%;
  border-radius: inherit;
  background-image: repeating-linear-gradient(45deg, $color 0 10px, rgba($color, .55) 10px 20px);
  background-size: 28px 28px;
}
.bar.is-demo { animation: stripe-move $duration $easing infinite; }

@keyframes stripe-move {
  from { background-position: 0 0; }
  to   { background-position: 28px 0; }
}

.cap {
  margin: 14px 0 0;
  color: rgba(23, 20, 26, .75);
  font: 600 clamp(12px, 3.2vw, 14px)/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  .bar.is-demo { animation: 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);
}

.track {
  position: relative;
  width: clamp(200px, 58vw, 280px);
  height: 16px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.14);
  overflow: hidden;
}

.bar {
  position: absolute;
  inset: 0;
  width: 62%;
  border-radius: inherit;
  background-image: repeating-linear-gradient(45deg, #17141a 0 10px, rgba(23, 20, 26, 0.55) 10px 20px);
  background-size: 28px 28px;
}

.bar.is-demo {
  animation: stripe-move 1s linear infinite;
}

@keyframes stripe-move {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 28px 0;
  }
}
.cap {
  margin: 14px 0 0;
  color: rgba(23, 20, 26, 0.75);
  font: 600 clamp(12px, 3.2vw, 14px)/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

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

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

export type StripedBarProps = {
  /** 0~100 */
  percent: number;
  duration?: number;
  easing?: string;
  color?: string;
  label?: string;
};

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

export default function StripedBar({
  percent,
  duration = 1000,
  easing = "linear",
  color = "#17141a",
  label,
}: StripedBarProps) {
  const p = Math.max(0, Math.min(100, percent));
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color, "--percent": p };

  return (
    <div
      className={styles.track}
      style={vars}
      role="progressbar"
      aria-valuemin={0}
      aria-valuemax={100}
      aria-valuenow={p}
      aria-label={label}
    >
      <div className={styles.bar} />
    </div>
  );
}