01Input with icon or unit prefix/suffix

<main class="stage">
  <div class="affix is-demo" id="wrap">
    <div class="affix__field">
      <label class="affix__label" for="email-input">Email</label>
      <div class="affix__control">
        <svg class="affix__icon" aria-hidden="true" viewBox="0 0 20 20" width="16" height="16" fill="none">
          <rect x="2" y="4" width="16" height="12" rx="2" stroke="currentColor" stroke-width="1.6"/>
          <path d="M2.5 5L10 11L17.5 5" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round"/>
        </svg>
        <input class="affix__input affix__input--prefix" id="email-input" type="text" placeholder="[email protected]">
      </div>
    </div>
    <div class="affix__field">
      <label class="affix__label" for="weight-input">Weight</label>
      <div class="affix__control">
        <input class="affix__input affix__input--suffix" id="weight-input" type="text" placeholder="0">
        <span class="affix__unit" aria-hidden="true">kg</span>
      </div>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-quick;     // 테두리 색 전환 시간
$easing: $ease-out;        // 포커스 이징
$color: $subject-blue;     // 포커스 강조 색

// ── 데모 무대 ──────────────────────────────────────────
@include stage($stage-ink);

.affix {
  box-sizing: border-box;
  width: min(280px, 86vw);
  background: $subject-cream;
  border-radius: $r-card;
  padding: $sp-4;
  box-shadow: $shadow-raised;
  display: flex;
  flex-direction: column;
  gap: $sp-4;

  &__field {
    display: flex;
    flex-direction: column;
    gap: $sp-1;
  }

  &__label {
    display: block;
    font-weight: 700;
    font-size: 12px;
    line-height: 1;
    font-family: inherit;
    color: $stage-ink;
  }

  &__control {
    position: relative;
    display: flex;
    align-items: center;
  }

  &__icon {
    position: absolute;
    left: $sp-3;
    color: rgba(23, 20, 26, .45);
    pointer-events: none;
    transition: color $duration $easing;
  }

  &__unit {
    position: absolute;
    right: $sp-3;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    color: rgba(23, 20, 26, .45);
    pointer-events: none;
    transition: color $duration $easing;
  }

  &__input {
    box-sizing: border-box;
    width: 100%;
    border: 2px solid transparent;
    border-radius: $r-control;
    padding: $sp-3 $sp-4;
    font-weight: 500;
    font-size: clamp(14px, 4.2vw, 16px);
    font-family: inherit;
    color: $stage-ink;
    background: #fff;
    transition: border-color $duration $easing;

    &--prefix { padding-left: $sp-10; }
    &--suffix { padding-right: $sp-8; }

    &:focus {
      outline: none;
      border-color: $color;
      & ~ .affix__unit { color: $color; }
    }
  }

  &__control:focus-within &__icon { color: $color; }
}

@media (prefers-reduced-motion: reduce) {
  .affix__input,
  .affix__icon,
  .affix__unit {
    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);
}

.affix {
  box-sizing: border-box;
  width: min(280px, 86vw);
  background: #fff7e6;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.affix__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.affix__label {
  display: block;
  font-weight: 700;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
  color: #17141a;
}
.affix__control {
  position: relative;
  display: flex;
  align-items: center;
}
.affix__icon {
  position: absolute;
  left: 12px;
  color: rgba(23, 20, 26, 0.45);
  pointer-events: none;
  transition: color 220ms ease-out;
}
.affix__unit {
  position: absolute;
  right: 12px;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.45);
  pointer-events: none;
  transition: color 220ms ease-out;
}
.affix__input {
  box-sizing: border-box;
  width: 100%;
  border: 2px solid transparent;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 500;
  font-size: clamp(14px, 4.2vw, 16px);
  font-family: inherit;
  color: #17141a;
  background: #fff;
  transition: border-color 220ms ease-out;
}
.affix__input--prefix {
  padding-left: 40px;
}
.affix__input--suffix {
  padding-right: 32px;
}
.affix__input:focus {
  outline: none;
  border-color: #2f6df6;
}
.affix__input:focus ~ .affix__unit {
  color: #2f6df6;
}
.affix__control:focus-within .affix__icon {
  color: #2f6df6;
}

@media (prefers-reduced-motion: reduce) {
  .affix__input,
  .affix__icon,
  .affix__unit {
    transition: none;
  }
}

(function () {
  var wrap = document.getElementById('wrap');
  var emailInput = document.getElementById('email-input');
  var weightInput = document.getElementById('weight-input');

  function stopDemo() {
    if (!wrap.classList.contains('is-demo')) return;
    wrap.classList.remove('is-demo');
    clearInterval(timer);
  }
  emailInput.addEventListener('pointerdown', stopDemo);
  emailInput.addEventListener('keydown', stopDemo);
  weightInput.addEventListener('pointerdown', stopDemo);
  weightInput.addEventListener('keydown', stopDemo);

  function fireInput(el) {
    el.dispatchEvent(new Event('input', { bubbles: true }));
  }

  // 각 단계: target(어느 input) · text(칠 문자열) · hold(다 친 뒤 멈춤 ms)
  var script = [
    { el: emailInput, text: '[email protected]', hold: 900 },
    { el: weightInput, text: '58', hold: 900 }
  ];
  var stepIdx = 0, chars = '', phase = 'focus', pauseUntil = 0;

  var timer = setInterval(function () {
    var now = Date.now();
    if (now < pauseUntil) return;
    var step = script[stepIdx];

    if (phase === 'focus') {
      step.el.focus({ preventScroll: true });
      phase = 'type';
      return;
    }
    if (phase === 'type') {
      if (chars.length < step.text.length) {
        chars += step.text[chars.length];
        step.el.value = chars;
        fireInput(step.el);
      } else {
        phase = 'hold';
        pauseUntil = now + step.hold;
      }
      return;
    }
    if (phase === 'hold') {
      step.el.value = '';
      fireInput(step.el);
      step.el.blur();
      chars = '';
      stepIdx = (stepIdx + 1) % script.length;
      phase = 'focus';
      pauseUntil = now + 220;
    }
  }, 140);
})();

import { useState } from "react";
import styles from "./IconAffixInput.module.scss";

export type IconAffixInputProps = {
  emailLabel?: string;
  weightLabel?: string;
};

export default function IconAffixInput({
  emailLabel = "이메일",
  weightLabel = "몸무게",
}: IconAffixInputProps) {
  const [email, setEmail] = useState("");
  const [weight, setWeight] = useState("");

  return (
    <div className={styles.affix}>
      <div className={styles.field}>
        <label className={styles.label} htmlFor="email-input">
          {emailLabel}
        </label>
        <div className={styles.control}>
          <svg
            className={styles.icon}
            aria-hidden="true"
            viewBox="0 0 20 20"
            width="16"
            height="16"
            fill="none"
          >
            <rect x="2" y="4" width="16" height="12" rx="2" stroke="currentColor" strokeWidth="1.6" />
            <path
              d="M2.5 5L10 11L17.5 5"
              stroke="currentColor"
              strokeWidth="1.6"
              strokeLinecap="round"
              strokeLinejoin="round"
            />
          </svg>
          <input
            className={`${styles.input} ${styles.inputPrefix}`}
            id="email-input"
            type="text"
            placeholder="[email protected]"
            value={email}
            onChange={(e: any) => setEmail(e.target.value)}
          />
        </div>
      </div>
      <div className={styles.field}>
        <label className={styles.label} htmlFor="weight-input">
          {weightLabel}
        </label>
        <div className={styles.control}>
          <input
            className={`${styles.input} ${styles.inputSuffix}`}
            id="weight-input"
            type="text"
            placeholder="0"
            value={weight}
            onChange={(e: any) => setWeight(e.target.value)}
          />
          <span className={styles.unit} aria-hidden="true">
            kg
          </span>
        </div>
      </div>
    </div>
  );
}