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2019-02-12-CSS 中省略号的几种写法.html
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2019-02-12-CSS 中省略号的几种写法.html
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<h2 id="CSS-中省略号的几种写法"><a href="#CSS-中省略号的几种写法" class="headerlink" title="CSS 中省略号的几种写法"></a>CSS 中省略号的几种写法</h2><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"><!DOCTYPE html></span></span><br><span class="line"><span class="tag"><<span class="name">html</span> <span class="attr">lang</span>=<span class="string">"en"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">head</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">title</span>></span>省略号的四种写法<span class="tag"></<span class="name">title</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">style</span>></span><span class="undefined"></span></span><br><span class="line"><span class="undefined"> p{</span></span><br><span class="line"><span class="undefined"> width: 80%;</span></span><br><span class="line"><span class="css"> <span class="selector-tag">margin</span><span class="selector-pseudo">:auto</span>;</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="css"> <span class="selector-class">.prg</span>{</span></span><br><span class="line"><span class="undefined"> height: 20px;</span></span><br><span class="line"><span class="undefined"> line-height: 20px;</span></span><br><span class="line"><span class="undefined"> white-space: nowrap;</span></span><br><span class="line"><span class="undefined"> overflow: hidden;</span></span><br><span class="line"><span class="undefined"> text-overflow: ellipsis;</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="undefined"> /*</span></span><br><span class="line"><span class="undefined"> white-space </span></span><br><span class="line"><span class="undefined"> 设置如何处理元素内的空白。</span></span><br><span class="line"><span class="undefined"> 这个属性声明建立布局过程中如何处理元素中的空白符，默认值为 normal </span></span><br><span class="line"><span class="undefined"> normal 默认，空白会被浏览器忽略</span></span><br><span class="line"><span class="xml"> pre 空白会被浏览器保留，其行为方式类似 HTML 中的 <span class="tag"><<span class="name">pre</span>></span> 标签</span></span><br><span class="line"><span class="xml"> nowrap 文本不会换行，文本会在同一行上继续，知道遇到 <span class="tag"><<span class="name">br</span>></span> 标签为止</span></span><br><span class="line"><span class="undefined"> pre-wrap 保留空白符序列，但是正常地进行换行</span></span><br><span class="line"><span class="undefined"> pre-line 合并空白符序列，但是保留换行符</span></span><br><span class="line"><span class="undefined"> inherit 规定应该从父元素继承 white-space 属性的值 </span></span><br><span class="line"><span class="undefined"></span></span><br><span class="line"><span class="undefined"> text-overflow</span></span><br><span class="line"><span class="undefined"> 规定当文本溢出包含元素时发生的事情 默认值为 clip</span></span><br><span class="line"><span class="undefined"> clip 修剪文本</span></span><br><span class="line"><span class="undefined"> elipsis 显示省略符号来代表被修剪的文本</span></span><br><span class="line"><span class="undefined"> string 使用给定的字符串来代表被修剪的文本 </span></span><br><span class="line"><span class="undefined"> */</span></span><br><span class="line"><span class="undefined"></span></span><br><span class="line"><span class="css"> <span class="selector-class">.prg1</span>{</span></span><br><span class="line"><span class="undefined"> position: relative;</span></span><br><span class="line"><span class="undefined"> overflow: hidden;</span></span><br><span class="line"><span class="undefined"> text-overflow: ellipsis;</span></span><br><span class="line"><span class="undefined"> height: 60px;</span></span><br><span class="line"><span class="undefined"> line-height: 20px;</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="css"> <span class="selector-class">.prg1</span><span class="selector-pseudo">::after</span>{</span></span><br><span class="line"><span class="undefined"> content: '...';</span></span><br><span class="line"><span class="undefined"> padding-left: 3px;</span></span><br><span class="line"><span class="undefined"> position: absolute;</span></span><br><span class="line"><span class="undefined"> top: 20px;</span></span><br><span class="line"><span class="undefined"> left: 0;</span></span><br><span class="line"><span class="undefined"> display: block;</span></span><br><span class="line"><span class="undefined"> height: 20px;</span></span><br><span class="line"><span class="undefined"> width: 20px;</span></span><br><span class="line"><span class="css"> <span class="selector-tag">background</span>: <span class="selector-id">#fff</span>;</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="css"> <span class="selector-class">.prg2</span>{</span></span><br><span class="line"><span class="undefined"> display: -webkit-box;</span></span><br><span class="line"><span class="css"> <span class="selector-tag">-webkit-box-orient</span><span class="selector-pseudo">:vertical</span>;</span></span><br><span class="line"><span class="undefined"> overflow: hidden;</span></span><br><span class="line"><span class="undefined"> text-overflow: ellipsis;</span></span><br><span class="line"><span class="css"> <span class="selector-tag">-webkit-line-clamp</span><span class="selector-pseudo">:1</span>;</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="undefined"> /*</span></span><br><span class="line"><span class="undefined"> -webkit-line-clamp</span></span><br><span class="line"><span class="undefined"> 是一个不规范的属性，还没有出现在 CSS 规范草案中</span></span><br><span class="line"><span class="undefined"> 限制一个块元素显示的文本行数，为了实现该效果，它需要组合其他外来的Webkit属性，</span></span><br><span class="line"><span class="css"> 常见的属性：<span class="selector-tag">display</span><span class="selector-pseudo">:-webkit-box</span>; 必须结合的属性，将对象作为弹性伸缩盒子模型显示</span></span><br><span class="line"><span class="undefined"> -webkit-box-orient 必须结合的属性，设置或检索伸缩盒对象的子元素的排列方式</span></span><br><span class="line"><span class="undefined"> text-overflow 可以用来多行文本的情况下，用省略号... 隐藏超出范围的文本。</span></span><br><span class="line"><span class="undefined"> */</span></span><br><span class="line"><span class="undefined"> </span><span class="tag"></<span class="name">style</span>></span></span><br><span class="line"><span class="tag"></<span class="name">head</span>></span></span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">h3</span>></span>单行省略...<span class="tag"></<span class="name">h3</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span> <span class="attr">class</span>=<span class="string">"prg"</span>></span>前端技术一般分为前端设计和前端开发，前端设计一般可以理解为网站的视觉设计，前端开发则是网站的前台代码实现，包括基本的HTML和CSS以及JavaScript/ajax，现在最新的高级版本HTML5、CSS3，以及SVG等。<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">h3</span>></span>多行省略...<span class="tag"></<span class="name">h3</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span> <span class="attr">class</span>=<span class="string">"prg1"</span>></span>前端技术一般分为前端设计和前端开发，前端设计一般可以理解为网站的视觉设计，前端开发则是网站的前台代码实现，包括基本的HTML和CSS以及JavaScript/ajax，现在最新的高级版本HTML5、CSS3，以及SVG等。<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">h3</span>></span>多行省略...<span class="tag"></<span class="name">h3</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span> <span class="attr">class</span>=<span class="string">"prg2"</span>></span>前端技术一般分为前端设计和前端开发，前端设计一般可以理解为网站的视觉设计，前端开发则是网站的前台代码实现，包括基本的HTML和CSS以及JavaScript/ajax，现在最新的高级版本HTML5、CSS3，以及SVG等。<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">h3</span>></span>多行省略...<span class="tag"></<span class="name">h3</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span> <span class="attr">class</span>=<span class="string">"prg3"</span>></span>前端技术一般分为前端设计和前端开发，前端设计一般可以理解为网站的视觉设计，前端开发则是网站的前台代码实现，包括基本的HTML和CSS以及JavaScript/ajax，现在最新的高级版本HTML5、CSS3，以及SVG等。<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br><span class="line"><span class="tag"><<span class="name">script</span>></span><span class="undefined"></span></span><br><span class="line"><span class="javascript"> (<span class="function"><span class="keyword">function</span> (<span class="params">w</span>) </span>{</span></span><br><span class="line"><span class="javascript"> <span class="keyword">const</span> shortLine = <span class="function"><span class="keyword">function</span> (<span class="params">pragrafsClass, number</span>) </span>{</span></span><br><span class="line"><span class="javascript"> <span class="keyword">const</span> prgs = <span class="built_in">document</span>.getElementsByClassName(pragrafsClass);</span></span><br><span class="line"><span class="javascript"> <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">0</span>; i < prgs.length; i++) {</span></span><br><span class="line"><span class="javascript"> <span class="keyword">let</span> contents = prgs[i].textContent;</span></span><br><span class="line"><span class="javascript"> <span class="keyword">if</span> (contents.length >= number) {</span></span><br><span class="line"><span class="javascript"> <span class="keyword">let</span> strs = contents.slice(<span class="number">0</span>, number)</span></span><br><span class="line"><span class="javascript"> prgs[i].textContent = strs + <span class="string">"..."</span></span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="undefined"> }</span></span><br><span class="line"><span class="undefined"> w.shortLine = shortLine</span></span><br><span class="line"><span class="javascript"> })(<span class="built_in">window</span>)</span></span><br><span class="line"><span class="javascript"> <span class="built_in">window</span>.shortLine(<span class="string">'prg3'</span>,<span class="number">18</span>)</span></span><br><span class="line"><span class="undefined"> </span><span class="tag"></<span class="name">script</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">html</span>></span></span><br></pre></td></tr></table></figure>
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