js 加入收藏

function addToFavorites(url, title) {
    try {
        window.external.AddFavorite(url, title);
    } catch (e) {
        alert('您的浏览器不支持此操作，请手动添加到收藏夹。');
    }
}

<button onclick="addToFavorites(window.location.href, document.title)">加入收藏</button>

<a href="javascript:void(0);" onclick="addToFavorites()">加入收藏</a>

<script>
function addToFavorites() {
    const title = document.title;
    const url = window.location.href;
    if (window.sidebar && window.sidebar.addPanel) { // Firefox
        window.sidebar.addPanel(title, url, "");
    } else if (window.external && ('AddFavorite' in window.external)) { // IE
        window.external.AddFavorite(url, title);
    } else if (window.opera && window.print) { // Opera
        const elem = document.createElement('a');
        elem.setAttribute('href', url);
        elem.setAttribute('title', title);
        elem.setAttribute('rel', 'sidebar');
        elem.click();
    } else { // 其他浏览器
        alert('请按 Ctrl+D 或 Cmd+D 将本页添加到收藏夹。');
    }
}
</script>