// 添加css

    document.getElementsByTagName(‘head‘)[0].innerHTML += ‘<link href="https://cdn.bootcdn.net/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.css" rel="stylesheet">‘;

  <script src="https://cdn.bootcdn.net/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.js"></script>

    // 获取图片列表 

    $(‘.detail-content-desc-box‘).find(‘img‘).each(function () { 

        var _this = $(this).attr(‘title‘,‘‘ + _alt + ‘‘); 

        var _src = _this.attr("src"); 

        var _alt = _this.attr("alt"); 

        _this.wrap(‘<a data-fancybox="images" href="‘ + _src + ‘"></a>‘);

            })

    });