带有JavaScript的HTML内容的工具提示

我使用了一个小例子

css

.hover {  position: relative;  top: 50px;  left: 50px;}.tooltip {    top: -10px;  background-color: black;  color: white;  border-radius: 5px;  opacity: 0;  position: absolute;  -webkit-transition: opacity 0.5s;  -moz-transition: opacity 0.5s;  -ms-transition: opacity 0.5s;  -o-transition: opacity 0.5s;  transition: opacity 0.5s;}.hover:hover .tooltip {    opacity: 1;}<div >hover  <div >asdadasd  </div></div>