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<!DOCTYPE html>
<html class="theme-next pisces use-motion" lang="zh-Hans">
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<a class="post-title-link" href="/uncategorized/目前控制文本溢出显示-的几种纯css方法/" itemprop="url">目前控制文本溢出显示...的几种纯css方法</a></h1>
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<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-01-22T10:30:10+08:00">
2019-01-22
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807
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<span class="post-meta-divider">|</span>
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<i class="fa fa-clock-o"></i>
</span>
<span class="post-meta-item-text">阅读时长 ≈</span>
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3
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<h3 id="目前几种纯css控制文本溢出显示…的方法"><a href="#目前几种纯css控制文本溢出显示…的方法" class="headerlink" title="目前几种纯css控制文本溢出显示…的方法"></a>目前几种纯css控制文本溢出显示…的方法</h3><h4 id="1、单行文本-text-overflow-（通用）"><a href="#1、单行文本-text-overflow-（通用）" class="headerlink" title="1、单行文本 text-overflow （通用）"></a>1、单行文本 text-overflow （通用）</h4><figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line"><span class="selector-tag">text</span> {</div><div class="line"> <span class="attribute">overflow</span>: hidden;</div><div class="line"> <span class="attribute">white-space</span>: nowrap;</div><div class="line"> <span class="attribute">text-overflow</span>: ellipsis;</div><div class="line">}</div></pre></td></tr></table></figure>
<h4 id="2、多行文本"><a href="#2、多行文本" class="headerlink" title="2、多行文本"></a>2、多行文本</h4><h5 id="2-1-webkit-line-clamp-谷歌特有"><a href="#2-1-webkit-line-clamp-谷歌特有" class="headerlink" title="2.1 -webkit-line-clamp (谷歌特有)"></a>2.1 -webkit-line-clamp (谷歌特有)</h5><figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="selector-tag">text</span> {</div><div class="line"> display: -webkit-box; //将对象作为弹性伸缩盒子模型显示</div><div class="line"> <span class="selector-tag">overflow</span>: <span class="selector-tag">hidden</span>;</div><div class="line"> <span class="selector-tag">-webkit-line-clamp</span>: 2; </div><div class="line"> -webkit-box-orient: vertical; //设置或检索伸缩盒对象的子元素的排列方式</div><div class="line">}</div></pre></td></tr></table></figure>
<ul>
<li>因为 -webkit-line-clamp 是一个不规范的属性，它没有出现在 CSS 规范草案中。<strong>只有 webkit 内核的浏览器才支持这个属性</strong>，像 Firefox, IE 浏览器统统都不支持这个属性。兼容性不好！</li>
<li>多用于移动端页面，因为移动设备浏览器更多是基于 webkit 内核。</li>
</ul>
<h5 id="2-2-float-特性实现多行文本截断"><a href="#2-2-float-特性实现多行文本截断" class="headerlink" title="2.2 float 特性实现多行文本截断"></a>2.2 float 特性实现多行文本截断</h5><p>基本原理：</p>
<p><a href="https://raw.githubusercontent.com/happylindz/blog/master/images/jiequ/6.jpg" target="_blank" rel="external"><img src="https://raw.githubusercontent.com/happylindz/blog/master/images/jiequ/6.jpg" alt="img"></a></p>
<p>有个三个盒子 div，粉色盒子左浮动，浅蓝色盒子和黄色盒子右浮动，</p>
<ol>
<li><strong>当浅蓝色盒子的高度低于粉色盒子，黄色盒子仍会处于浅蓝色盒子右下方。</strong></li>
<li><strong>如果浅蓝色盒子文本过多，高度超过了粉色盒子，则黄色盒子不会停留在右下方，而是掉到了粉色盒子下。</strong></li>
</ol>
<p>好了，这样两种状态的两种展示形式已经区分开了，那么我们可以将黄色盒子进行相对定位，将内容溢出的黄色盒子移动到文本内容右下角，而未溢出的则会被移到外太空去了，只要我们使用 <code>overflow: hidden</code> 就可以隐藏掉。</p>
<p><a href="https://raw.githubusercontent.com/happylindz/blog/master/images/jiequ/7.jpg" target="_blank" rel="external"><img src="https://raw.githubusercontent.com/happylindz/blog/master/images/jiequ/7.jpg" alt="img"></a></p>
<p>基本原理就是这样，我们可以将浅蓝色区域想象成标题，黄色区域想象为省略号效果。那么你可能会觉得粉色盒子占了空间，那岂不是标题会整体延后了吗，这里可以通过 <code>margin</code> 的负值来出来，设置浅蓝色盒子的 <code>margin-left</code> 的负值与粉色盒子的宽度相同，标题也能正常显示。</p>
<p>那么我们将前面的 DOM 结构简化下，变成下面这样：</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"wrap"</span>></span></div><div class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"text"</span>></span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dignissimos labore sit vel itaque delectus atque quos magnam assumenda quod architecto perspiciatis animi.<span class="tag"></<span class="name">div</span>></span></div><div class="line"><span class="tag"></<span class="name">div</span>></span></div></pre></td></tr></table></figure>
<p>刚才的粉色盒子和黄色盒子都可以用伪元素来代替。</p>
<figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div></pre></td><td class="code"><pre><div class="line"><span class="selector-class">.wrap</span> {</div><div class="line"> <span class="attribute">height</span>: <span class="number">40px</span>;</div><div class="line"> <span class="attribute">line-height</span>: <span class="number">20px</span>;</div><div class="line"> <span class="attribute">overflow</span>: hidden;</div><div class="line">}</div><div class="line"><span class="selector-class">.wrap</span> <span class="selector-class">.text</span> {</div><div class="line"> <span class="attribute">float</span>: right;</div><div class="line"> <span class="attribute">margin-left</span>: -<span class="number">5px</span>;</div><div class="line"> <span class="attribute">width</span>: <span class="number">100%</span>;</div><div class="line"> <span class="attribute">word-break</span>: break-all;</div><div class="line">}</div><div class="line"><span class="selector-class">.wrap</span><span class="selector-pseudo">::before</span> {</div><div class="line"> <span class="attribute">float</span>: left;</div><div class="line"> <span class="attribute">width</span>: <span class="number">5px</span>;</div><div class="line"> <span class="attribute">content</span>: <span class="string">''</span>;</div><div class="line"> <span class="attribute">height</span>: <span class="number">40px</span>;</div><div class="line">}</div><div class="line"><span class="selector-class">.wrap</span><span class="selector-pseudo">::after</span> {</div><div class="line"> <span class="attribute">float</span>: right;</div><div class="line"> <span class="attribute">content</span>: <span class="string">"..."</span>;</div><div class="line"> <span class="attribute">height</span>: <span class="number">20px</span>;</div><div class="line"> <span class="attribute">line-height</span>: <span class="number">20px</span>;</div><div class="line"> <span class="comment">/* 为三个省略号的宽度 */</span></div><div class="line"> <span class="attribute">width</span>: <span class="number">3em</span>;</div><div class="line"> <span class="comment">/* 使盒子不占位置 */</span></div><div class="line"> <span class="attribute">margin-left</span>: -<span class="number">3em</span>;</div><div class="line"> <span class="comment">/* 移动省略号位置 */</span></div><div class="line"> <span class="attribute">position</span>: relative;</div><div class="line"> <span class="attribute">left</span>: <span class="number">100%</span>;</div><div class="line"> <span class="attribute">top</span>: -<span class="number">20px</span>;</div><div class="line"> <span class="attribute">padding-right</span>: <span class="number">5px</span>;</div><div class="line">}</div></pre></td></tr></table></figure>
<p>优点：</p>
<ol>
<li>兼容性好，对各大主流浏览器有好的支持</li>
<li>响应式截断，根据不同宽度做出调整</li>
<li>文本超出范围才显示省略号，否则不显示省略号</li>
</ol>
<ul>
<li>因为是模拟省略号，所以显示位置有时候没办法刚刚好，可以考虑：</li>
</ul>
<ol>
<li>加一个渐变效果，贴合文字.</li>
<li>添加 <code>word-break: break-all;</code> 使一个单词能够在换行时进行拆分，这样文字和省略号贴合效果更佳。</li>
</ol>
<blockquote>
<p>原文地址 : <a href="https://github.com/happylindz/blog/issues/12" target="_blank" rel="external">https://github.com/happylindz/blog/issues/12</a></p>
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<p>给定一个整数数组，判断是否存在重复元素。</p>
<p>如果任何值在数组中出现至少两次，函数返回 true。如果数组中每个元素都不相同，则返回 false。</p>
</blockquote>
<h5 id="方法一：es6-Set方法"><a href="#方法一：es6-Set方法" class="headerlink" title="方法一：es6 Set方法"></a>方法一：es6 Set方法</h5><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">var</span> containsDuplicate = <span class="function"><span class="keyword">function</span> (<span class="params">nums</span>) </span>{</div><div class="line"> <span class="keyword">const</span> set = <span class="keyword">new</span> <span class="built_in">Set</span>(nums)</div><div class="line"> <span class="keyword">return</span> set.size != nums.length</div><div class="line">};</div></pre></td></tr></table></figure>
<h5 id="方法二：sort排序比较临近两项"><a href="#方法二：sort排序比较临近两项" class="headerlink" title="方法二：sort排序比较临近两项"></a>方法二：sort排序比较临近两项</h5><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">var</span> containsDuplicate = <span class="function"><span class="keyword">function</span>(<span class="params">nums</span>) </span>{</div><div class="line"> <span class="keyword">if</span>(nums.length<=<span class="number">1</span>){</div><div class="line"> <span class="keyword">return</span> <span class="literal">false</span></div><div class="line"> }</div><div class="line"> nums.sort(<span class="function"><span class="keyword">function</span>(<span class="params">a,b</span>)</span>{</div><div class="line"> <span class="keyword">return</span> a-b</div><div class="line"> })</div><div class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> i =<span class="number">0</span>; i<nums.length<span class="number">-1</span>;i++){</div><div class="line"> <span class="keyword">if</span>(nums[i]==nums[i+<span class="number">1</span>]){</div><div class="line"> <span class="keyword">return</span> <span class="literal">true</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> <span class="keyword">return</span> <span class="literal">false</span></div><div class="line">};</div></pre></td></tr></table></figure>
<h5 id="方法三：利用对象属性"><a href="#方法三：利用对象属性" class="headerlink" title="方法三：利用对象属性"></a>方法三：利用对象属性</h5><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">var</span> containsDuplicate = <span class="function"><span class="keyword">function</span>(<span class="params">nums</span>) </span>{</div><div class="line"> <span class="keyword">let</span> obj = {}</div><div class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> i <span class="keyword">of</span> nums){</div><div class="line"> <span class="keyword">if</span>(!obj[i]){</div><div class="line"> obj[i]=<span class="number">1</span></div><div class="line"> <span class="keyword">continue</span> <span class="comment">//continue 跳过当前循环 </span></div><div class="line"> }</div><div class="line"> <span class="keyword">return</span> <span class="literal">true</span></div><div class="line"> }</div><div class="line"> <span class="keyword">return</span> <span class="literal">false</span></div><div class="line">}</div></pre></td></tr></table></figure>
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<h5 id="方法一：使用es6的set快速去重"><a href="#方法一：使用es6的set快速去重" class="headerlink" title="方法一：使用es6的set快速去重"></a>方法一：使用es6的set快速去重</h5><blockquote>
<p>set 为一种特殊的数据结构，它具有唯一性。Array.from()把伪数转换成数组。</p>
</blockquote>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="built_in">Array</span>.from(<span class="keyword">new</span> <span class="built_in">Set</span>(arr))</div></pre></td></tr></table></figure>
<blockquote>
<p>扩展运算符（内部使用的是for…of循环）</p>
</blockquote>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">[...new <span class="built_in">Set</span>(arr)]</div></pre></td></tr></table></figure>
<h5 id="方法二：使用对象的属性不能相同去重"><a href="#方法二：使用对象的属性不能相同去重" class="headerlink" title="方法二：使用对象的属性不能相同去重"></a>方法二：使用对象的属性不能相同去重</h5><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div></pre></td><td class="code"><pre><div class="line"><span class="built_in">Array</span>.prototype.remove=<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</div><div class="line"> <span class="keyword">let</span> arr=<span class="keyword">this</span>,obj={},newArr=[]</div><div class="line"> <span class="keyword">for</span>(i=<span class="number">0</span>; i<arr.length; i++){</div><div class="line"> <span class="keyword">if</span>(!obj[arr[i]]){ <!--找不到则证明这个元素没有重复--></div><div class="line"> obj[arr[i]] = <span class="number">1</span></div><div class="line"> newArr.push(arr[i])</div><div class="line"> }</div><div class="line"> } </div><div class="line"> <span class="keyword">return</span> newArr</div><div class="line">}</div></pre></td></tr></table></figure>
<h5 id="方法三：双层循环"><a href="#方法三：双层循环" class="headerlink" title="方法三：双层循环"></a>方法三：双层循环</h5><blockquote>
<p>外层循环元素，内层循环时比较值，如果有相同的值则跳过，不相同则push进数组。</p>
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<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div></pre></td><td class="code"><pre><div class="line"><span class="built_in">Array</span>.prototype.remove= <span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</div><div class="line"> <span class="keyword">var</span> arr = <span class="keyword">this</span>, result = [], i, j,</div><div class="line"> <span class="keyword">for</span>(i = <span class="number">0</span>; i < arr.length; i++){</div><div class="line"> <span class="keyword">for</span>(j = i + <span class="number">1</span>; j < arr.length; j++){</div><div class="line"> <span class="keyword">if</span>(arr[i] === arr[j]){</div><div class="line"> j = ++i;</div><div class="line"> }</div><div class="line">}</div><div class="line"> result.push(arr[i]);</div><div class="line"> }</div><div class="line"> <span class="keyword">return</span> result;</div><div class="line">}</div></pre></td></tr></table></figure>
<h5 id="方法四：splice在原数组进行操作"><a href="#方法四：splice在原数组进行操作" class="headerlink" title="方法四：splice在原数组进行操作"></a>方法四：<strong>splice在原数组进行操作</strong></h5><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div></pre></td><td class="code"><pre><div class="line"><span class="function"><span class="keyword">function</span> <span class="title">removeDuplicates</span>(<span class="params">nums</span>) </span>{ </div><div class="line"><span class="keyword">for</span>(<span class="keyword">let</span> i = nums.length<span class="number">-1</span>;i>=<span class="number">0</span>;i--){</div><div class="line"> <span class="keyword">for</span>(<span class="keyword">let</span> j = i<span class="number">-1</span> ; j>=<span class="number">0</span>; j--){</div><div class="line"> <span class="keyword">if</span>(nums[i]==nums[j]){</div><div class="line"> nums.splice(j,<span class="number">1</span>)</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> <span class="keyword">return</span> nums</div><div class="line">}</div></pre></td></tr></table></figure>
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