多余文字转化为省略号css

overflow: hidden;
text-overflow: ellipsis;//clip|ellipsis
white-space: nowrap;

width: 200px;
overflow : hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
border:solid 1px black;

.demo {
    height: 200px;
    width: 200px;
    position:relative;
    line-height:1.4em;
    height:4.2em;
    overflow:hidden;
}
.demo::after {
    content:"...";
    font-weight:bold;
    position:absolute;
    bottom:0;
    right:0;
    padding:0 -20px 1px 45px;
    background-color:white;
}