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HTML

              
                
<div class="layout">
  <h4>默认</h4>
  <div class="box">
    Most words are short & don't need to break. But <b class="orange">Antidisestablishmentarianism</b> is too long.</div>
</div>
<div class="layout">
  <h4>字符超出部分自动换行</h4>
  <div class="box">
    Most words are short & don't need to break. But <b class="wrap orange">Antidisestablishmentarianism</b> is too long.</div>
</div>
<div class="layout">
  <h4>字符超出位置使用连字符</h4>
  <div class="box">
    Most words are short & don't need to break. But <b class="hyphens orange">Antidisestablishmentarianism</b> is too long.</div>
</div>
<div class="layout">
  <h4>单行溢出省略</h4>
  <div class="box ellipsis">
    Most words are short & don't need to break. But <b>Antidisestablishmentarianism</b> is too long.</div>
</div>
<div class="layout">
  <h4>多行溢出省略</h4>
  <div class="box line-clamp">
    Most words are short & don't need to break. But <b>Antidisestablishmentarianism</b> is too long.</div>
</div>
              
            
!

CSS

              
                .layout {
  width: 180px;
  margin: 50px auto;
}
.layout .orange {
  color: orange;
}
h4 {
  margin: 10px 0;
  position: relative;
}
h4::before {
  content: '#';
  display: block;
  color: #41b883;
  position: absolute;
  font-size: 18px;
  line-height: 22px;
  left: -18px;
  top: 0;
}
.box {
  border: 1px solid #ddd;
}
.wrap {
  overflow-wrap: break-word;
}
.hyphens {
  hyphens: auto;
}
.ellipsis {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.line-clamp {
  overflow : hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
              
            
!

JS

              
                
              
            
!
999px

Console