空心三角原理:主要利用元素伪类(:before,:after)实现
效果图: ps:移入换色
实现代码:
#talkbubble {
width: 120px;
height: 80px;
position: relative;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
border: 1px #808080 solid;
background-color: #fff;
}
#talkbubble:before {
content: " ";
position: absolute;
top: 100%;
left: 50px;
width: 0;
height: 0;
border-left: 15px solid transparent;
border-top: 15px solid #808080;
border-right: 15px solid transparent;
}
.inlayer:after {
content: " ";
position: absolute;
top: 100%;
left: 51px;
width: 0;
height: 0;
border-left: 14px solid transparent;
border-top: 14px solid #fff;
border-right: 14px solid transparent;
}
#talkbubble:hover {
background-color: #ff0000;
}
.inlayer:hover:after {
width: 0;
height: 0;
border-left: 14px solid transparent;
border-top: 14px solid #ff0000;
border-right: 14px solid transparent;
}
空心三角形