05Tag input

<main class="stage">
  <div class="tags is-demo" id="wrap">
    <label class="tags__label" for="tag-input">Keywords</label>
    <ul class="tags__list" id="list" aria-label="Added tags"></ul>
    <input class="tags__input" id="tag-input" type="text" placeholder="Type and press Enter" aria-describedby="tag-hint">
    <p class="tags__hint" id="tag-hint">Enter to add · Backspace to remove</p>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-quick;     // 태그가 나타나는 시간
$easing: $ease-pop;        // 팝 이징
$color: $subject-blue;     // 태그 배경 색

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

.tags {
  box-sizing: border-box;
  width: min(272px, 84vw);
  background: $subject-cream;
  border-radius: $r-card;
  padding: $sp-4;
  box-shadow: $shadow-raised;

  &__label {
    display: block;
    margin: 0 0 $sp-1;
    font-weight: 700;
    font-size: 12px;
    line-height: 1;
    font-family: inherit;
    color: $stage-ink;
  }

  &__list {
    display: flex;
    flex-wrap: wrap;
    gap: $sp-1;
    margin: 0 0 $sp-2;
    padding: 0;
    list-style: none;
    min-height: 24px;
  }

  &__chip {
    display: flex;
    align-items: center;
    gap: $sp-1;
    background: $subject-blue-deep;   // 크림 면 위 칩 — 흰 글자가 4.5 넘게 deep 면(6.37:1)
    color: $stage-paper;
    border-radius: $r-pill;
    padding: $sp-1 $sp-2 $sp-1 $sp-3;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;

  }

  &__remove {
    border: 0;
    background: rgba(23, 20, 26, .25);
    color: $stage-paper;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    line-height: 1;
    font-size: 12px;
    cursor: pointer;
    transition: background $duration $easing;
    &:hover, &:focus-visible { background: rgba(255, 255, 255, .45); }
  }

  &__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;
    &:focus { outline: none; border-color: $color; }
  }

  &__hint {
    margin: $sp-1 0 0;
    font-size: 11px;
    line-height: 1.4;
    font-family: inherit;
    color: rgba(23, 20, 26, .72);
  }
}

.tags.is-demo .tags__chip { animation: pop $duration $easing both; }

@keyframes pop {
  0%   { transform: scale(.5); opacity: 0; }
  70%  { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .tags__chip { animation: none; }
  .tags__input, .tags__remove { 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);
}

.tags {
  box-sizing: border-box;
  width: min(272px, 84vw);
  background: #fff7e6;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}
.tags__label {
  display: block;
  margin: 0 0 4px;
  font-weight: 700;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
  color: #17141a;
}
.tags__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
  min-height: 24px;
}
.tags__chip {
  display: flex;
  align-items: center;
  gap: 4px;
  background: #0a4fe8;
  color: #ffffff;
  border-radius: 999px;
  padding: 4px 8px 4px 12px;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
}
.tags__remove {
  border: 0;
  background: rgba(23, 20, 26, 0.25);
  color: #ffffff;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  line-height: 1;
  font-size: 12px;
  cursor: pointer;
  transition: background 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}
.tags__remove:hover, .tags__remove:focus-visible {
  background: rgba(255, 255, 255, 0.45);
}
.tags__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 cubic-bezier(0.2, 1.4, 0.4, 1);
}
.tags__input:focus {
  outline: none;
  border-color: #2f6df6;
}
.tags__hint {
  margin: 4px 0 0;
  font-size: 11px;
  line-height: 1.4;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.72);
}

.tags.is-demo .tags__chip {
  animation: pop 220ms cubic-bezier(0.2, 1.4, 0.4, 1) both;
}

@keyframes pop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  70% {
    transform: scale(1.06);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .tags__chip {
    animation: none;
  }
  .tags__input, .tags__remove {
    transition: none;
  }
}

(function () {
  var wrap = document.getElementById('wrap');
  var list = document.getElementById('list');
  var input = document.getElementById('tag-input');
  var tags = [];

  function render() {
    list.innerHTML = '';
    tags.forEach(function (t, idx) {
      var li = document.createElement('li');
      li.className = 'tags__chip';
      var span = document.createElement('span');
      span.textContent = t;
      var btn = document.createElement('button');
      btn.type = 'button';
      btn.className = 'tags__remove';
      btn.setAttribute('aria-label', t + ' — remove tag');
      btn.textContent = '×';
      btn.addEventListener('click', function () { stopDemo(); tags.splice(idx, 1); render(); });
      li.appendChild(span); li.appendChild(btn);
      list.appendChild(li);
    });
  }
  function add(t) { t = t.trim(); if (t) { tags.push(t); render(); } }

  input.addEventListener('keydown', function (e) {
    if (e.key === 'Enter' || e.key === ',') {
      e.preventDefault(); stopDemo(); add(input.value); input.value = '';
    } else if (e.key === 'Backspace' && !input.value && tags.length) {
      stopDemo(); tags.pop(); render();
    }
  });
  input.addEventListener('pointerdown', stopDemo);

  function stopDemo() {
    if (!wrap.classList.contains('is-demo')) return;
    wrap.classList.remove('is-demo');
    clearInterval(timer);
  }

  var script = ['Design', 'React', 'CSS', 'Responsive'];
  var step = 0, chars = '', paused = false;
  var timer = setInterval(function () {
    if (paused) return;
    var word = script[step];
    if (chars.length < word.length) {
      chars += word[chars.length];
      input.value = chars;
    } else {
      add(chars); input.value = ''; chars = ''; step++;
      if (step >= script.length) {
        paused = true;
        setTimeout(function () { tags = []; step = 0; paused = false; render(); }, 500);
      }
    }
  }, 140);
})();

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

export type TagInputProps = {
  label?: string;
  initialTags?: string[];
};

export default function TagInput({ label = "키워드", initialTags = [] }: TagInputProps) {
  const [tags, setTags] = useState<string[]>(initialTags);
  const [draft, setDraft] = useState("");

  const add = (t: string) => {
    const v = t.trim();
    if (v) setTags((prev) => [...prev, v]);
  };

  const onKeyDown = (e: { key: string; preventDefault: () => void }) => {
    if (e.key === "Enter" || e.key === ",") {
      e.preventDefault();
      add(draft);
      setDraft("");
    } else if (e.key === "Backspace" && !draft && tags.length) {
      setTags((prev) => prev.slice(0, -1));
    }
  };

  return (
    <div className={styles.tags}>
      <label className={styles.label}>{label}</label>
      <ul className={styles.list} aria-label="추가된 태그">
        {tags.map((t, i) => (
          <li key={t + i} className={styles.chip}>
            <span>{t}</span>
            <button
              type="button"
              className={styles.remove}
              aria-label={`${t} 태그 삭제`}
              onClick={() => setTags((prev) => prev.filter((_, idx) => idx !== i))}
            >
              ×
            </button>
          </li>
        ))}
      </ul>
      <input
        className={styles.input}
        type="text"
        placeholder="입력 후 Enter"
        value={draft}
        onChange={(e: any) => setDraft(e.target.value)}
        onKeyDown={onKeyDown}
      />
    </div>
  );
}