如何用 css 或 js 实现多行文本溢出省略效果，考虑兼容性

单行：

overflow: hidden; text-overflow:ellipsis; white-space: nowrap; 

多行：

 display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; //行数 overflow: hidden;

兼容：

 p{position: relative; line-height: 20px; max-height: 40px;overflow: hidden;} p::after{content: "..."; position: absolute; bottom: 0; right: 0; padding-left: 40px; background: -webkit-linear-gradient(left, transparent, #fff 55%); background: -o-linear-gradient(right, transparent, #fff 55%); background: -moz-linear-gradient(right, transparent, #fff 55%); background: linear-gradient(to right, transparent, #fff 55%); }