08Aspect-ratio crop preset picker

<main class="stage">
  <div class="ar is-demo">
    <div class="ar__preview"><div class="ar__box" id="box"></div></div>
    <div class="ar__chips" role="radiogroup" aria-label="Select aspect ratio">
      <label class="ar__chip"><input type="radio" name="ar" class="ar__radio" value="1/1" checked><span>1:1</span></label>
      <label class="ar__chip"><input type="radio" name="ar" class="ar__radio" value="4/5"><span>4:5</span></label>
      <label class="ar__chip"><input type="radio" name="ar" class="ar__radio" value="16/9"><span>16:9</span></label>
      <label class="ar__chip"><input type="radio" name="ar" class="ar__radio" value="9/16"><span>9:16</span></label>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────
$duration: $dur-base;
$easing: $ease-spring;
$color: $stage-orange;

@include stage($stage-paper);

.ar { display: flex; flex-direction: column; align-items: center; gap: $sp-2; }
.ar__preview { height: 96px; display: grid; place-items: center; width: 100%; }
.ar__box {
  aspect-ratio: 1 / 1; height: 100%; max-width: 90%;
  border-radius: $r-sm; background: rgba($color, .16); border: 2px solid $color;
  transition: aspect-ratio $duration $easing;
}
.ar__chips { display: flex; gap: $sp-2; }
.ar__chip { position: relative; }
.ar__radio { position: absolute; opacity: 0; width: 1px; height: 1px; }
.ar__chip span {
  display: grid; place-items: center; padding: $sp-2 $sp-3; border-radius: $r-pill;
  border: 1px solid rgba($subject-ink, .18); font-size: 12px; font-weight: 700; color: $subject-ink;
  cursor: pointer; transition: background-color $duration $easing, color $duration $easing, transform $duration $easing;
}
.ar__radio:checked ~ span { background: $color; border-color: $color; color: #fff; transform: scale(1.05); }
.ar__radio:focus-visible ~ span { outline: 2px solid $subject-ink; outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  .ar__box, .ar__chip span { 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);
}

.ar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.ar__preview {
  height: 96px;
  display: grid;
  place-items: center;
  width: 100%;
}

.ar__box {
  aspect-ratio: 1/1;
  height: 100%;
  max-width: 90%;
  border-radius: 8px;
  background: rgba(255, 77, 31, 0.16);
  border: 2px solid #ff4d1f;
  transition: aspect-ratio 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ar__chips {
  display: flex;
  gap: 8px;
}

.ar__chip {
  position: relative;
}

.ar__radio {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.ar__chip span {
  display: grid;
  place-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(23, 20, 26, 0.18);
  font-size: 12px;
  font-weight: 700;
  color: #17141a;
  cursor: pointer;
  transition: background-color 300ms cubic-bezier(0.2, 0.8, 0.2, 1), color 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ar__radio:checked ~ span {
  background: #ff4d1f;
  border-color: #ff4d1f;
  color: #fff;
  transform: scale(1.05);
}

.ar__radio:focus-visible ~ span {
  outline: 2px solid #17141a;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .ar__box, .ar__chip span {
    transition: none;
  }
}

(function () {
  var ar = document.querySelector('.ar'), box = document.getElementById('box');
  var radios = Array.prototype.slice.call(ar.querySelectorAll('.ar__radio'));
  function apply(v) { box.style.aspectRatio = v; }
  radios.forEach(function (r) { r.addEventListener('change', function () { stop(); apply(r.value); }); });

  var seq = ['1/1', '4/5', '16/9', '9/16'], si = 0;
  var t = setInterval(function () {
    si = (si + 1) % seq.length;
    radios[si].checked = true; apply(seq[si]);
  }, 700);
  function stop() { ar.classList.remove('is-demo'); clearInterval(t); }
  apply('1/1');
}());

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

export type AspectRatioCropPresetPickerProps = {
  ratios?: string[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function AspectRatioCropPresetPicker({
  ratios = ["1/1", "4/5", "16/9", "9/16"],
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#ff4d1f",
}: AspectRatioCropPresetPickerProps) {
  const [ratio, setRatio] = useState(ratios[0]);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--c": color };

  return (
    <div className={styles.ar} style={vars}>
      <div className={styles.preview}>
        <div className={styles.box} style={{ aspectRatio: ratio }} />
      </div>
      <div className={styles.chips} role="radiogroup" aria-label="Select aspect ratio">
        {ratios.map((r) => (
          <label key={r} className={styles.chip}>
            <input type="radio" name="ratio" className={styles.radio} checked={ratio === r}
              onChange={() => setRatio(r)} />
            <span data-on={ratio === r}>{r.replace("/", ":")}</span>
          </label>
        ))}
      </div>
    </div>
  );
}