通过jquery在列表最后追加div标签实现

var flexhook = $('.flex-hook');
if(flexhook.length > 0 && flexhook.children().length > 0) {
    var flexchild = flexhook.children().get(0);
    var flexchildren = flexhook.children().length;
    var flexcolumn = flexhook.data('flex-column');
    var flexappend = (flexcolumn - (flexchildren % flexcolumn)) % flexcolumn;
    var flexchildwidth = $(flexchild).width();
    if(flexappend > 0) {
        var flexspace = (flexhook.width() - flexcolumn * flexchildwidth) / (flexcolumn - 1);
        flexspace = (flexappend > 1) ? (flexappend - 1) * flexspace : 0;
        $('<div></div>').width(flexchildwidth * flexappend + flexspace).appendTo(flexhook);
    }
}