09Checklist gạch ngang khi hoàn thành

<main class="stage">
  <ul class="ck-list" aria-label="Danh sách mua sắm">
    <li class="ck-item is-demo">
      <button class="ck-item__box" type="button" role="checkbox" aria-checked="false">
        <svg viewBox="0 0 256 256" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>
      </button>
      <span class="ck-item__text">Mua một hộp dâu tây</span>
    </li>
    <li class="ck-item">
      <button class="ck-item__box" type="button" role="checkbox" aria-checked="false">
        <svg viewBox="0 0 256 256" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>
      </button>
      <span class="ck-item__text">Mua sữa</span>
    </li>
  </ul>
</main>

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

$duration: $dur-base;                                  // 체크·취소선 시간
$easing: $ease-pop;
$color: $subject-pink;                                 // 캔디 체크 색

@include stage($stage-paper);

.ck-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(240px, 78vw);
  display: flex;
  flex-direction: column;
  gap: $sp-3;
}

.ck-item {
  display: flex;
  align-items: center;
  gap: $sp-3;
  padding: $sp-3;
  border-radius: $r-card;
  background: #fff0f5;                 // $subject-pink 를 흰 배경에 옅게 섞은 불투명 톤
}

.ck-item__box {
  position: relative;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  border: 2px solid $color;
  border-radius: $r-xs;
  background: $stage-paper;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background $duration $easing;
}
.ck-item__box:focus-visible { outline: 2px solid $subject-blue; outline-offset: 2px; }
.ck-item__box svg { width: 14px; height: 14px; color: $stage-paper; transform: scale(.4); opacity: 0; transition: transform $duration $easing, opacity $duration $easing; }
.ck-item.is-checked .ck-item__box { background: $color; }
.ck-item.is-checked .ck-item__box svg { transform: scale(1); opacity: 1; }

.ck-item__text {
  position: relative;
  font-size: 13px;
  color: $stage-ink;
  transition: opacity $duration $easing;
}
.ck-item__text::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: $color;
  transform: scaleX(0);
  transform-origin: left; // 규칙8: 취소선 왼쪽 그리기
  transition: transform $duration $easing;
}
.ck-item.is-checked .ck-item__text { opacity: .5; }
.ck-item.is-checked .ck-item__text::after { transform: scaleX(1); }

// 데모 강제 루프 — 체크 → 취소선 → 원복 을 keyframes 로
.ck-item.is-demo .ck-item__box { animation: ck-box-loop $dur-loop $easing infinite; }
.ck-item.is-demo .ck-item__box svg { animation: ck-check-loop $dur-loop $easing infinite; }
.ck-item.is-demo .ck-item__text { animation: ck-text-loop $dur-loop $easing infinite; }
.ck-item.is-demo .ck-item__text::after { animation: ck-line-loop $dur-loop $easing infinite; }

@keyframes ck-box-loop {
  0%, 10%   { background: $stage-paper; }
  35%, 80%  { background: $color; }
  95%, 100% { background: $stage-paper; }
}
@keyframes ck-check-loop {
  0%, 10%   { transform: scale(.4); opacity: 0; }
  40%       { transform: scale(1.15); opacity: 1; }
  50%, 80%  { transform: scale(1); opacity: 1; }
  95%, 100% { transform: scale(.4); opacity: 0; }
}
@keyframes ck-text-loop {
  0%, 10%   { opacity: 1; }
  35%, 80%  { opacity: .5; }
  95%, 100% { opacity: 1; }
}
@keyframes ck-line-loop {
  0%, 10%   { transform: scaleX(0); }
  40%, 80%  { transform: scaleX(1); }
  95%, 100% { transform: scaleX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .ck-item__box, .ck-item__box svg, .ck-item__text, .ck-item__text::after { transition: 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);
}

.ck-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(240px, 78vw);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ck-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 16px;
  background: #fff0f5;
}

.ck-item__box {
  position: relative;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  border: 2px solid #ff9ebb;
  border-radius: 4px;
  background: #ffffff;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ck-item__box:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.ck-item__box svg {
  width: 14px;
  height: 14px;
  color: #ffffff;
  transform: scale(0.4);
  opacity: 0;
  transition: transform 300ms cubic-bezier(0.2, 1.4, 0.4, 1), opacity 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ck-item.is-checked .ck-item__box {
  background: #ff9ebb;
}

.ck-item.is-checked .ck-item__box svg {
  transform: scale(1);
  opacity: 1;
}

.ck-item__text {
  position: relative;
  font-size: 13px;
  color: #17141a;
  transition: opacity 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ck-item__text::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: #ff9ebb;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ck-item.is-checked .ck-item__text {
  opacity: 0.5;
}

.ck-item.is-checked .ck-item__text::after {
  transform: scaleX(1);
}

.ck-item.is-demo .ck-item__box {
  animation: ck-box-loop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.ck-item.is-demo .ck-item__box svg {
  animation: ck-check-loop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.ck-item.is-demo .ck-item__text {
  animation: ck-text-loop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.ck-item.is-demo .ck-item__text::after {
  animation: ck-line-loop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes ck-box-loop {
  0%, 10% {
    background: #ffffff;
  }
  35%, 80% {
    background: #ff9ebb;
  }
  95%, 100% {
    background: #ffffff;
  }
}
@keyframes ck-check-loop {
  0%, 10% {
    transform: scale(0.4);
    opacity: 0;
  }
  40% {
    transform: scale(1.15);
    opacity: 1;
  }
  50%, 80% {
    transform: scale(1);
    opacity: 1;
  }
  95%, 100% {
    transform: scale(0.4);
    opacity: 0;
  }
}
@keyframes ck-text-loop {
  0%, 10% {
    opacity: 1;
  }
  35%, 80% {
    opacity: 0.5;
  }
  95%, 100% {
    opacity: 1;
  }
}
@keyframes ck-line-loop {
  0%, 10% {
    transform: scaleX(0);
  }
  40%, 80% {
    transform: scaleX(1);
  }
  95%, 100% {
    transform: scaleX(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ck-item__box, .ck-item__box svg, .ck-item__text, .ck-item__text::after {
    transition: none;
  }
}

(function () {
  document.querySelectorAll('.ck-item__box').forEach(function (box) {
    box.addEventListener('click', function () {
      var item = box.closest('.ck-item');
      item.classList.remove('is-demo');
      var checked = box.getAttribute('aria-checked') === 'true';
      box.setAttribute('aria-checked', checked ? 'false' : 'true');
      item.classList.toggle('is-checked', !checked);
    });
  });
})();

import { useState, type CSSProperties } from "react";
import styles from "./ChecklistStrikethroughComplete.module.scss";

export type ChecklistStrikethroughCompleteProps = {
  items: string[];
  /** 체크·취소선 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  /** 캔디 체크 색 */
  color?: string;
};

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

/** 체크박스를 누르면 캔디 색으로 차오르고, 글자엔 왼쪽에서 오른쪽으로 취소선이 그어진다 */
export default function ChecklistStrikethroughComplete({
  items,
  duration = 300,
  easing = "cubic-bezier(.2,1.4,.4,1)",
  color = "#ff9ebb",
}: ChecklistStrikethroughCompleteProps) {
  const [checked, setChecked] = useState<Record<number, boolean>>({});
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <ul className={styles.list} style={vars} aria-label="장보기 목록">
      {items.map((text, i) => {
        const done = !!checked[i];
        return (
          <li key={text} className={`${styles.item} ${done ? styles.checked : ""}`}>
            <button
              className={styles.box}
              type="button"
              role="checkbox"
              aria-checked={done}
              onClick={() => setChecked((c) => ({ ...c, [i]: !c[i] }))}
            >
              <svg viewBox="0 0 256 256" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2" /><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32" /></g></svg>
            </button>
            <span className={styles.text}>{text}</span>
          </li>
        );
      })}
    </ul>
  );
}