html – 更改：之前：将鼠标悬停在主DIV上？

我有一个看起来像讲话泡泡的div.主要的div是泡沫和：之前是箭头.我想要做的是,当你翻转时：将DIV悬停在CSS中,它也会改变：之前.

这是我的代码：

.sidebar_image_Box_newsFeed_user_info_comments { color: #ffffff; background-color: #2f2f2e; text-decoration: none; -webkit-transition-property: background-color,color,text-decoration; -webkit-transition-duration: 0.5s,0.5s,0.5s; }

.sidebar_image_Box_newsFeed_user_info_comments:hover { background-color: #3b3b3b; color: #f3f3f3; text-decoration: underline; }

.sidebar_image_Box_newsFeed_user_info_comments:before { content:""; position:absolute; bottom:-6px; right:0; border-width:0 0 6px 6px;  border-style:solid; border-color:transparent #2f2f2e;  text-decoration: none; -webkit-transition-property: background-color,0.5s; }

解决方法

.sidebar_image_Box_newsFeed_user_info_comments:hover:before {
   content: "I am new";
}

jsFiddle.