01行のインライン展開

<main class="stage">
  <ul class="rowx-list" aria-label="注文履歴">
    <li class="rowx-item">
      <button class="rowx-item__head is-demo" type="button" aria-expanded="false">
        <svg class="rowx-item__caret" viewBox="0 0 256 256" aria-hidden="true"><g fill="currentColor"><path d="m176 128l-80 80V48Z" opacity=".2"/><path d="m181.66 122.34l-80-80A8 8 0 0 0 88 48v160a8 8 0 0 0 13.66 5.66l80-80a8 8 0 0 0 0-11.32M104 188.69V67.31L164.69 128Z"/></g></svg>
        <span class="rowx-item__title">注文 #10493</span>
        <span class="rowx-item__meta">32,000円</span>
      </button>
      <div class="rowx-item__body">
        <div class="rowx-item__body-inner">
          <p>配送先 ソウル江南区・決済 カカオペイ</p>
          <p>2026-09-08 到着予定</p>
        </div>
      </div>
    </li>
    <li class="rowx-item">
      <button class="rowx-item__head" type="button" aria-expanded="false">
        <svg class="rowx-item__caret" viewBox="0 0 256 256" aria-hidden="true"><g fill="currentColor"><path d="m176 128l-80 80V48Z" opacity=".2"/><path d="m181.66 122.34l-80-80A8 8 0 0 0 88 48v160a8 8 0 0 0 13.66 5.66l80-80a8 8 0 0 0 0-11.32M104 188.69V67.31L164.69 128Z"/></g></svg>
        <span class="rowx-item__title">注文 #10488</span>
        <span class="rowx-item__meta">18,500円</span>
      </button>
      <div class="rowx-item__body">
        <div class="rowx-item__body-inner">
          <p>配送先 京畿道城南市・決済 カード</p>
          <p>配送完了 2026-09-05</p>
        </div>
      </div>
    </li>
  </ul>
</main>

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

$duration: $dur-base;                                  // 펼침 시간
$easing: $ease-spring;
$color: $subject-blue;                                 // 캐럿·강조색

@include stage($stage-ink);

.rowx-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(300px, 84vw);
  display: flex;
  flex-direction: column;
  gap: $sp-3;
}

.rowx-item {
  border-radius: $r-card;
  background: $stage-paper;
  overflow: hidden;
}

.rowx-item__head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: $sp-2;
  padding: $sp-4;
  border: 0;
  background: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}
.rowx-item__head:focus-visible { outline: 2px solid $color; outline-offset: -2px; border-radius: $r-card; }

.rowx-item__caret {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: $color;
  transition: transform $duration $easing;
}
.rowx-item.is-open .rowx-item__caret { transform: rotate(90deg); }

.rowx-item__title { flex: 1 1 auto; font-weight: 700; font-size: 14px; color: $stage-ink; }
.rowx-item__meta { font-size: 12px; color: rgba(23, 20, 26, .6); }

.rowx-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows $duration $easing;
}
.rowx-item.is-open .rowx-item__body { grid-template-rows: 1fr; }

.rowx-item__body-inner {
  overflow: hidden;
  visibility: hidden;   // 접힌 상태(0fr) 에서 글자가 겹쳐 보이는 것을 막는다 — 열리면 보임
  padding: 0 $sp-4;
  display: flex;
  flex-direction: column;
  gap: $sp-1;
}
.rowx-item.is-open .rowx-item__body-inner { padding: 0 $sp-4 $sp-4; visibility: visible; }
.rowx-item__body-inner p { margin: 0; font-size: 12px; color: rgba(23, 20, 26, .72); }

// 데모 강제 루프 — 첫 항목만 열림/닫힘을 keyframes 로 반복 (document.getAnimations() 가 잡도록 transition 이 아니라 animation)
.rowx-item__head.is-demo { pointer-events: none; }
.rowx-item__head.is-demo .rowx-item__caret { animation: rowx-caret-loop $dur-loop $easing infinite; }
.rowx-item:has(.rowx-item__head.is-demo) .rowx-item__body { animation: rowx-rows-loop $dur-loop $easing infinite; }

@keyframes rowx-caret-loop {
  0%, 10%   { transform: rotate(0deg); }
  40%, 65%  { transform: rotate(90deg); }
  95%, 100% { transform: rotate(0deg); }
}
@keyframes rowx-rows-loop {
  0%, 10%   { grid-template-rows: 0fr; }
  40%, 65%  { grid-template-rows: 1fr; }
  95%, 100% { grid-template-rows: 0fr; }
}

@media (prefers-reduced-motion: reduce) {
  .rowx-item__caret, .rowx-item__body { transition: none; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.rowx-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(300px, 84vw);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rowx-item {
  border-radius: 16px;
  background: #ffffff;
  overflow: hidden;
}

.rowx-item__head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px;
  border: 0;
  background: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.rowx-item__head:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: -2px;
  border-radius: 16px;
}

.rowx-item__caret {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: #2f6df6;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.rowx-item.is-open .rowx-item__caret {
  transform: rotate(90deg);
}

.rowx-item__title {
  flex: 1 1 auto;
  font-weight: 700;
  font-size: 14px;
  color: #17141a;
}

.rowx-item__meta {
  font-size: 12px;
  color: rgba(23, 20, 26, 0.6);
}

.rowx-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.rowx-item.is-open .rowx-item__body {
  grid-template-rows: 1fr;
}

.rowx-item__body-inner {
  overflow: hidden;
  visibility: hidden;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rowx-item.is-open .rowx-item__body-inner {
  padding: 0 16px 16px;
  visibility: visible;
}

.rowx-item__body-inner p {
  margin: 0;
  font-size: 12px;
  color: rgba(23, 20, 26, 0.72);
}

.rowx-item__head.is-demo {
  pointer-events: none;
}

.rowx-item__head.is-demo .rowx-item__caret {
  animation: rowx-caret-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.rowx-item:has(.rowx-item__head.is-demo) .rowx-item__body {
  animation: rowx-rows-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes rowx-caret-loop {
  0%, 10% {
    transform: rotate(0deg);
  }
  40%, 65% {
    transform: rotate(90deg);
  }
  95%, 100% {
    transform: rotate(0deg);
  }
}
@keyframes rowx-rows-loop {
  0%, 10% {
    grid-template-rows: 0fr;
  }
  40%, 65% {
    grid-template-rows: 1fr;
  }
  95%, 100% {
    grid-template-rows: 0fr;
  }
}
@media (prefers-reduced-motion: reduce) {
  .rowx-item__caret, .rowx-item__body {
    transition: none;
  }
}

(function () {
  document.querySelectorAll('.rowx-item__head').forEach(function (btn) {
    var item = btn.closest('.rowx-item');
    btn.addEventListener('click', function () {
      btn.classList.remove('is-demo');
      var open = item.classList.toggle('is-open');
      btn.setAttribute('aria-expanded', open ? 'true' : 'false');
    });
  });
})();

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

export type OrderRow = { title: string; meta: string; lines: string[] };

export type RowExpandInlineDetailProps = {
  rows: OrderRow[];
  /** 펼침 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  /** 캐럿·강조색 */
  color?: string;
};

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

/** 클릭한 행의 인덱스를 열림 상태로 토글. grid-template-rows 0fr→1fr 로 높이를 부드럽게 편다 */
export default function RowExpandInlineDetail({
  rows,
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: RowExpandInlineDetailProps) {
  const [openIdx, setOpenIdx] = useState<number | null>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <ul className={styles.list} style={vars}>
      {rows.map((row, i) => {
        const open = openIdx === i;
        return (
          <li key={row.title} className={styles.item}>
            <button
              className={styles.head}
              type="button"
              aria-expanded={open}
              onClick={() => setOpenIdx(open ? null : i)}
            >
              <svg className={styles.caret} style={{ transform: open ? "rotate(90deg)" : undefined }} viewBox="0 0 256 256" aria-hidden="true">
                <g fill="currentColor"><path d="m176 128l-80 80V48Z" opacity=".2" /><path d="m181.66 122.34l-80-80A8 8 0 0 0 88 48v160a8 8 0 0 0 13.66 5.66l80-80a8 8 0 0 0 0-11.32M104 188.69V67.31L164.69 128Z" /></g>
              </svg>
              <span className={styles.title}>{row.title}</span>
              <span className={styles.meta}>{row.meta}</span>
            </button>
            <div className={styles.body} style={{ gridTemplateRows: open ? "1fr" : "0fr" }}>
              <div className={styles.bodyInner} style={{ visibility: open ? "visible" : "hidden" }}>
                {row.lines.map((line) => <p key={line}>{line}</p>)}
              </div>
            </div>
          </li>
        );
      })}
    </ul>
  );
}