css實作多行文本設定省略号

可以修改line-clamp的屬性值

overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  /* autoprefixer: off */
  -webkit-box-orient: vertical;
  display: -moz-box;
  -moz-line-clamp: 2;
  -moz-box-orient: vertical;
  word-wrap: break-word;
  word-break: break-all;
  white-space: normal;