Pagination / 019 — タブ｜Tab | UIデザイン実装コード

デザイン見本

下線に接続したタブとして現在ページを見せるデザインです。選択中のタブだけが線を切って前面に出るため、色に頼らずに現在地が伝わります。一覧と本文が地続きに見える構成に向きます。

実装コード

コピーしたHTML・CSS・JSは HTML・CSS・JSコードプレビューツールで動作確認できます。

HTML

<nav class="pagination" aria-label="ページ送り">
    <a href="#" class="page-btn prev" aria-label="前のページ">&lsaquo;</a>
    <a href="#" class="page-btn active" aria-current="page">1</a>
    <a href="#" class="page-btn">2</a>
    <a href="#" class="page-btn">3</a>
    <span class="page-dots">&hellip;</span>
    <a href="#" class="page-btn">12</a>
    <a href="#" class="page-btn next" aria-label="次のページ">&rsaquo;</a>
</nav>

CSS

.pagination {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 6px;
    border-bottom: 2px solid #d5dbe4;
    font-family: system-ui, -apple-system, sans-serif;
}

.pagination .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    position: relative;
    min-width: 40px;
    height: 36px;
    margin-bottom: -2px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 7px 7px 0 0;
    background: #eef1f6;
    color: #5b6474;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}

.pagination .page-btn:hover {
    background: #e2e7f0;
    color: #2b3444;
}

.pagination .page-btn.active {
    height: 40px;
    border-color: #d5dbe4;
    background: #ffffff;
    color: #2f6fd0;
    font-weight: 700;
    box-shadow: inset 0 2px 0 #2f6fd0;
}

.pagination .page-btn.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    background: #ffffff;
}

.pagination .page-dots {
    align-self: center;
    padding: 0 4px;
    margin-bottom: 4px;
    color: #9aa4b4;
    font-size: 14px;
}

(function () {
    var nav = document.querySelector('.pagination');
    if (!nav) return;

    var btns = nav.querySelectorAll('.page-btn');
    var nums = [];
    btns.forEach(function (b) {
        if (!b.classList.contains('prev') && !b.classList.contains('next')) nums.push(b);
    });

    function setActive(el) {
        nums.forEach(function (n) {
            n.classList.remove('active');
            n.removeAttribute('aria-current');
        });
        el.classList.add('active');
        el.setAttribute('aria-current', 'page');
    }

    function activeIdx() {
        for (var i = 0; i < nums.length; i++) {
            if (nums[i].classList.contains('active')) return i;
        }
        return 0;
    }

    btns.forEach(function (b) {
        b.addEventListener('click', function (e) {
            e.preventDefault();
            if (b.classList.contains('prev')) {
                var p = activeIdx() - 1;
                if (p >= 0) setActive(nums[p]);
            } else if (b.classList.contains('next')) {
                var n = activeIdx() + 1;
                if (n < nums.length) setActive(nums[n]);
            } else {
                setActive(b);
            }
        });
    });
})();