05リスト行のタップハイライト

-webkit-tap-highlight-color を透明にした上で、リスト行をタップするとカスタム背景色が一瞬光り 0.2 秒後に消え、どの行を押したか確認できる。

使いどころ設定メニューやチャットルーム一覧など、行単位でタップするリスト

-webkit-tap-highlight-color:active0.2초

<main class="stage">
  <ul class="list">
    <li class="is-demo" tabindex="0">通知</li>
    <li class="is-demo" tabindex="0">個人情報</li>
    <li class="is-demo" tabindex="0">アカウント</li>
  </ul>
</main>

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

$duration: $dur-quick;                            // 하이라이트가 사라지는 시간
$easing: $ease-out;
$color: $subject-blue;                            // 하이라이트 색

@include stage($stage-ink);

.list {
  width: min(220px, 70vw);
  background: $subject-cream;
  border-radius: $r-card;
  overflow: hidden;
  list-style: none;
  margin: 0;
  padding: 0;
}

.list li {
  position: relative;
  min-height: 44px;                               // 터치 목표 44px (WCAG 2.5.8 / Apple HIG)
  box-sizing: border-box;
  display: flex;
  align-items: center;
  padding: 14px 18px;
  font-weight: 600; font-size: 14px; line-height: 1; font-family: inherit;
  color: $stage-ink;
  background: $subject-cream;
  border-bottom: 1px solid rgba($stage-ink, .08);
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  transition: background $duration $easing;
  overflow: hidden;

  // 규칙8 한 겹: 배경 플래시와 함께 행 안쪽 가장자리로 두 겹 링이 불규칙하게 번지다 감쇠
  &::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 0 rgba($color, .4), inset 0 0 0 0 rgba($color, .22);
    opacity: 0;
    pointer-events: none;
  }
}
.list li:last-child { border-bottom: 0; }

.list li:active {
  background: rgba($color, .18);
  transition: background 0s;                      // 눌리는 순간은 지연 없이 즉시
}
.list li:active::after {
  animation: ripple-wave $dur-enter $easing;
}

.list li.is-demo { animation: row-flash $dur-loop $easing infinite; }
.list li.is-demo::after { animation: ripple-loop $dur-loop $easing infinite; }
.list li:nth-child(2).is-demo,
.list li:nth-child(2).is-demo::after { animation-delay: .4s; }
.list li:nth-child(3).is-demo,
.list li:nth-child(3).is-demo::after { animation-delay: .8s; }

@keyframes row-flash {
  0%, 8%  { background: rgba($color, .18); }
  35%     { background: $subject-cream; }
  100%    { background: $subject-cream; }
}

@keyframes ripple-wave {
  0%   { box-shadow: inset 0 0 0 0 rgba($color, .4), inset 0 0 0 0 rgba($color, .22); opacity: 1; }
  38%  { box-shadow: inset 0 0 0 8px rgba($color, .18), inset 0 0 0 3px rgba($color, .22); opacity: .7; }
  66%  { box-shadow: inset 0 0 0 14px rgba($color, .08), inset 0 0 0 9px rgba($color, .12); opacity: .3; }
  100% { box-shadow: inset 0 0 0 20px rgba($color, 0), inset 0 0 0 16px rgba($color, 0); opacity: 0; }
}

@keyframes ripple-loop {
  0%, 8%   { box-shadow: inset 0 0 0 0 rgba($color, .4), inset 0 0 0 0 rgba($color, .22); opacity: 1; }
  22%      { box-shadow: inset 0 0 0 8px rgba($color, .18), inset 0 0 0 3px rgba($color, .22); opacity: .7; }
  35%      { box-shadow: inset 0 0 0 14px rgba($color, .08), inset 0 0 0 9px rgba($color, .12); opacity: .3; }
  50%, 100% { box-shadow: inset 0 0 0 20px rgba($color, 0), inset 0 0 0 16px rgba($color, 0); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .list li { transition: none; }
  .list li::after { animation: none !important; opacity: 0; }
  .list li.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: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.list {
  width: min(220px, 70vw);
  background: #fff7e6;
  border-radius: 16px;
  overflow: hidden;
  list-style: none;
  margin: 0;
  padding: 0;
}

.list li {
  position: relative;
  min-height: 44px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  padding: 14px 18px;
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
  color: #17141a;
  background: #fff7e6;
  border-bottom: 1px solid rgba(23, 20, 26, 0.08);
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  transition: background 220ms ease-out;
  overflow: hidden;
}
.list li::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 0 rgba(47, 109, 246, 0.4), inset 0 0 0 0 rgba(47, 109, 246, 0.22);
  opacity: 0;
  pointer-events: none;
}

.list li:last-child {
  border-bottom: 0;
}

.list li:active {
  background: rgba(47, 109, 246, 0.18);
  transition: background 0s;
}

.list li:active::after {
  animation: ripple-wave 600ms ease-out;
}

.list li.is-demo {
  animation: row-flash 2s ease-out infinite;
}

.list li.is-demo::after {
  animation: ripple-loop 2s ease-out infinite;
}

.list li:nth-child(2).is-demo,
.list li:nth-child(2).is-demo::after {
  animation-delay: 0.4s;
}

.list li:nth-child(3).is-demo,
.list li:nth-child(3).is-demo::after {
  animation-delay: 0.8s;
}

@keyframes row-flash {
  0%, 8% {
    background: rgba(47, 109, 246, 0.18);
  }
  35% {
    background: #fff7e6;
  }
  100% {
    background: #fff7e6;
  }
}
@keyframes ripple-wave {
  0% {
    box-shadow: inset 0 0 0 0 rgba(47, 109, 246, 0.4), inset 0 0 0 0 rgba(47, 109, 246, 0.22);
    opacity: 1;
  }
  38% {
    box-shadow: inset 0 0 0 8px rgba(47, 109, 246, 0.18), inset 0 0 0 3px rgba(47, 109, 246, 0.22);
    opacity: 0.7;
  }
  66% {
    box-shadow: inset 0 0 0 14px rgba(47, 109, 246, 0.08), inset 0 0 0 9px rgba(47, 109, 246, 0.12);
    opacity: 0.3;
  }
  100% {
    box-shadow: inset 0 0 0 20px rgba(47, 109, 246, 0), inset 0 0 0 16px rgba(47, 109, 246, 0);
    opacity: 0;
  }
}
@keyframes ripple-loop {
  0%, 8% {
    box-shadow: inset 0 0 0 0 rgba(47, 109, 246, 0.4), inset 0 0 0 0 rgba(47, 109, 246, 0.22);
    opacity: 1;
  }
  22% {
    box-shadow: inset 0 0 0 8px rgba(47, 109, 246, 0.18), inset 0 0 0 3px rgba(47, 109, 246, 0.22);
    opacity: 0.7;
  }
  35% {
    box-shadow: inset 0 0 0 14px rgba(47, 109, 246, 0.08), inset 0 0 0 9px rgba(47, 109, 246, 0.12);
    opacity: 0.3;
  }
  50%, 100% {
    box-shadow: inset 0 0 0 20px rgba(47, 109, 246, 0), inset 0 0 0 16px rgba(47, 109, 246, 0);
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .list li {
    transition: none;
  }
  .list li::after {
    animation: none !important;
    opacity: 0;
  }
  .list li.is-demo {
    animation: none;
  }
}

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

export type TapHighlightListProps = {
  items: string[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function TapHighlightList({
  items,
  duration = 220,
  easing = "ease-out",
  color = "#2f6df6",
}: TapHighlightListProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  return (
    <ul className={styles.list} style={vars}>
      {items.map((label) => (
        <li key={label}>{label}</li>
      ))}
    </ul>
  );
}

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