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>
