03Nét đứt chạy quanh viền

<main class="stage">
  <div class="frame is-demo">
    <span class="frame__edge frame__edge--top" aria-hidden="true"></span>
    <span class="frame__edge frame__edge--right" aria-hidden="true"></span>
    <span class="frame__edge frame__edge--bottom" aria-hidden="true"></span>
    <span class="frame__edge frame__edge--left" aria-hidden="true"></span>
    <div class="frame__body">
      <p class="frame__label">Đang tải lên</p>
      <p class="frame__pct">42%</p>
    </div>
  </div>
</main>

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

$duration: $dur-loop;                                   // 한 바퀴 도는 시간
$easing: linear;
$color: $subject-cream;                                 // 점선 색

@include stage($stage-orange);
.stage { padding: clamp(6px, 2.4vw, 16px); }

.frame {
  position: relative;
  width: min(220px, 70vw);
  border-radius: 10px;
}
// 네 변을 따로 두고 각자의 방향으로 점선 배경을 흘려보낸다 — 한꺼번에 돌면 시계 방향으로 도는 것처럼 보인다
.frame__edge { position: absolute; }
.frame__edge--top, .frame__edge--bottom {
  left: 10px; right: 10px; height: 3px;
  background-image: repeating-linear-gradient(90deg, $color 0 8px, transparent 8px 16px);
}
.frame__edge--left, .frame__edge--right {
  top: 10px; bottom: 10px; width: 3px;
  background-image: repeating-linear-gradient(180deg, $color 0 8px, transparent 8px 16px);
}
.frame__edge--top { top: 0; }
.frame__edge--bottom { bottom: 0; }
.frame__edge--left { left: 0; }
.frame__edge--right { right: 0; }
.frame.is-demo .frame__edge--top    { animation: run-x $duration $easing infinite; }
.frame.is-demo .frame__edge--bottom { animation: run-x-rev $duration $easing infinite; }
.frame.is-demo .frame__edge--left   { animation: run-y-rev $duration $easing infinite; }
.frame.is-demo .frame__edge--right  { animation: run-y $duration $easing infinite; }
@keyframes run-x     { to { background-position: 32px 0; } }
@keyframes run-x-rev { to { background-position: -32px 0; } }
@keyframes run-y     { to { background-position: 0 32px; } }
@keyframes run-y-rev { to { background-position: 0 -32px; } }

.frame__body { padding: 22px 18px; }
.frame__label { margin: 0 0 4px; font-weight: 700; font-size: clamp(13px, 3.6vw, 15px); line-height: 1.3; font-family: inherit; color: $subject-ink; }
.frame__pct { margin: 0; font-weight: 500; font-size: clamp(11px, 3vw, 12px); line-height: 1.3; font-family: inherit; color: $subject-ink; }

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

.stage {
  padding: clamp(6px, 2.4vw, 16px);
}

.frame {
  position: relative;
  width: min(220px, 70vw);
  border-radius: 10px;
}

.frame__edge {
  position: absolute;
}

.frame__edge--top, .frame__edge--bottom {
  left: 10px;
  right: 10px;
  height: 3px;
  background-image: repeating-linear-gradient(90deg, #fff7e6 0 8px, transparent 8px 16px);
}

.frame__edge--left, .frame__edge--right {
  top: 10px;
  bottom: 10px;
  width: 3px;
  background-image: repeating-linear-gradient(180deg, #fff7e6 0 8px, transparent 8px 16px);
}

.frame__edge--top {
  top: 0;
}

.frame__edge--bottom {
  bottom: 0;
}

.frame__edge--left {
  left: 0;
}

.frame__edge--right {
  right: 0;
}

.frame.is-demo .frame__edge--top {
  animation: run-x 2s linear infinite;
}

.frame.is-demo .frame__edge--bottom {
  animation: run-x-rev 2s linear infinite;
}

.frame.is-demo .frame__edge--left {
  animation: run-y-rev 2s linear infinite;
}

.frame.is-demo .frame__edge--right {
  animation: run-y 2s linear infinite;
}

@keyframes run-x {
  to {
    background-position: 32px 0;
  }
}
@keyframes run-x-rev {
  to {
    background-position: -32px 0;
  }
}
@keyframes run-y {
  to {
    background-position: 0 32px;
  }
}
@keyframes run-y-rev {
  to {
    background-position: 0 -32px;
  }
}
.frame__body {
  padding: 22px 18px;
}

.frame__label {
  margin: 0 0 4px;
  font-weight: 700;
  font-size: clamp(13px, 3.6vw, 15px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.frame__pct {
  margin: 0;
  font-weight: 500;
  font-size: clamp(11px, 3vw, 12px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

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

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

export type DashedRunFrameProps = {
  label: string;
  pct: string;
  /** 한 바퀴 도는 시간 (기본 2000ms) */
  duration?: number;
  easing?: string;
  /** 점선 색 */
  color?: string;
};

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

export default function DashedRunFrame({
  label,
  pct,
  duration = 2000,
  easing = "linear",
  color = "#fff7e6",
}: DashedRunFrameProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.frame} style={vars}>
      <span className={`${styles.edge} ${styles.top}`} aria-hidden="true" />
      <span className={`${styles.edge} ${styles.right}`} aria-hidden="true" />
      <span className={`${styles.edge} ${styles.bottom}`} aria-hidden="true" />
      <span className={`${styles.edge} ${styles.left}`} aria-hidden="true" />
      <div className={styles.body}>
        <p className={styles.label}>{label}</p>
        <p className={styles.pct}>{pct}</p>
      </div>
    </div>
  );
}