小程序和H5怎么让文本只显示两行！超出后以...省略号显示！

小程序中

  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  word-wrap: break-word;
  white-space: normal !important;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;

H5中

  text-overflow: -o-ellipsis-lastline;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  padding-bottom: 3px;
  line-height: 120%;
  padding-top: 3px;
  height: 33px;