03Lau chữ hiện ra

<main class="stage">
  <h1 class="headline is-demo">Chữ hiện ra theo hiệu ứng wipe</h1>
</main>

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

// ── 변수 3개. 변형은 이것만 바꾼다 (값은 토큰에서 받는다) ──────
$duration: $dur-base;                            // 닦여 나오는 시간
$easing: $ease-spring;                           // 처음 빠르고 끝은 부드럽게
$color: $subject-cream;                          // 글자 색 (orange 무대라 cream)

// ── 데모 무대 (zip 에서 지워도 된다) ──────────────────────────
@include stage($stage-orange);

// ── 제목 ──────────────────────────────────────────────
.headline {
  margin: 0;
  font-weight: 800;
  font-size: clamp(22px, 7vw, 34px);
  line-height: 1.3;
  font-family: inherit;
  color: $color;
  text-align: center;

  // ── 실제 사용 코드: clip-path 하나로 왼쪽에서 오른쪽으로 닦인다 ──
  // width·left 대신 clip-path 만 바뀌므로 레이아웃 재계산이 없다.
  @supports (animation-timeline: view()) {
    animation: wipe-in $easing both;
    animation-timeline: view();
    animation-range: entry 20% cover 60%;
  }

  @supports not (animation-timeline: view()) {
    clip-path: inset(0 0 0 0);
  }
}

@keyframes wipe-in {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

// ── 데모(.is-demo): 스크롤 대신 2초 루프로 흉내 ────────────
.headline.is-demo {
  animation: wipe-loop $dur-loop $easing infinite;
}
@keyframes wipe-loop {
  0%   { clip-path: inset(0 100% 0 0); }
  35%  { clip-path: inset(0 0 0 0); }
  75%  { clip-path: inset(0 0 0 0); }
  100% { clip-path: inset(0 100% 0 0); }
}

// ── 접근성: 움직임 줄이기 설정이면 즉시 다 보여주기만 ────────
@media (prefers-reduced-motion: reduce) {
  .headline, .headline.is-demo { animation: none !important; clip-path: inset(0 0 0 0); }
}

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);
}

.headline {
  margin: 0;
  font-weight: 800;
  font-size: clamp(22px, 7vw, 34px);
  line-height: 1.3;
  font-family: inherit;
  color: #fff7e6;
  text-align: center;
}
@supports (animation-timeline: view()) {
  .headline {
    animation: wipe-in cubic-bezier(0.2, 0.8, 0.2, 1) both;
    animation-timeline: view();
    animation-range: entry 20% cover 60%;
  }
}
@supports not (animation-timeline: view()) {
  .headline {
    clip-path: inset(0 0 0 0);
  }
}

@keyframes wipe-in {
  from {
    clip-path: inset(0 100% 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}
.headline.is-demo {
  animation: wipe-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes wipe-loop {
  0% {
    clip-path: inset(0 100% 0 0);
  }
  35% {
    clip-path: inset(0 0 0 0);
  }
  75% {
    clip-path: inset(0 0 0 0);
  }
  100% {
    clip-path: inset(0 100% 0 0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .headline, .headline.is-demo {
    animation: none !important;
    clip-path: inset(0 0 0 0);
  }
}

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

export type TextWipeProps = {
  children: string;
  /** 닦여 나오는 시간 (기본 600ms) */
  duration?: number;
  /** easing (기본 cubic-bezier(.2,.8,.2,1)) */
  easing?: string;
  /** 글자 색 (기본 #17141a) */
  color?: string;
  className?: string;
};

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

export default function TextWipe({
  children,
  duration = 600,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#17141a",
  className = "",
}: TextWipeProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <h1 className={`${styles.headline} ${className}`} style={vars}>
      {children}
    </h1>
  );
}