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docs/javascript/Reference/Global_Objects/Math/random.html

@@ -12,7 +12,7 @@
 <p>不能使用它们来处理有关安全的事情。使用Web Crypto API 来代替, 和更精确的<a href="/zh-CN/docs/Web/API/RandomSource/getRandomValues" title="RandomSource.getRandomValues() 方法让你可以获取符合密码学要求的安全的随机值。传入参数的数组被随机值填充（在加密意义上的随机）。"><code>window.crypto.getRandomValues()</code></a> 方法.</p>
 </div>
 <h2 id="Syntax" name="Syntax">语法</h2>
-<pre class="syntaxbox"><code>Math.random()</code></pre>
+<pre><code class="language-javascript"><code>Math.random()</code></code></pre>
 <h3 id="Parameters" name="Parameters">返回参数</h3>
 <p>一个浮点型伪随机数字，在<code>0</code>（包括0）和<code>1</code>（不包括）之间。</p>
 <h2 id="Examples" name="Examples">示例</h2>
@@ -23,32 +23,32 @@
 <p>即："四舍六入五取偶"<br/>
  “五取偶”的规则：当小数部分恰为0.5时，若个位是奇数则入，若个位是偶数则舍，总之让个位变成偶数。</p>
 <h3 id="得到一个大于等于0，小于1之间的随机数">得到一个大于等于0，小于1之间的随机数</h3>
-<pre class="brush: js">function getRandom() {
+<pre><code  class="language-javascript">function getRandom() {
   return Math.random();
-}</pre>
+}</code></pre>
 <h3 id="得到一个两数之间的随机数">得到一个两数之间的随机数</h3>
 <p>这个例子返回了一个在指定值之间的随机数。这个值不小于 <code>min</code>（有可能等于），并且小于（不等于）<code>max</code>。</p>
-<pre class="brush: js">function getRandomArbitrary(min, max) {
+<pre><code  class="language-javascript">function getRandomArbitrary(min, max) {
   return Math.random() * (max - min) + min; 
-}</pre>
+}</code></pre>
 <h3 id="得到一个两数之间的随机整数">得到一个两数之间的随机整数</h3>
 <p>这个例子返回了一个在指定值之间的随机整数。这个值不小于 <code>min</code> （如果 <code>min</code> 不是整数，则不小于 <code>min</code> 的向上取整数），且小于（不等于）<code>max</code>。</p>
-<pre class="brush: js line-numbers language-js"><code class="language-js"><span class="keyword token">function</span> <span class="function token">getRandomInt</span><span class="punctuation token">(</span>min<span class="punctuation token">,</span> max<span class="punctuation token">)</span> <span class="punctuation token">{</span>
+<pre><code  class="language-javascript"><code class="language-js"><span class="keyword token">function</span> <span class="function token">getRandomInt</span><span class="punctuation token">(</span>min<span class="punctuation token">,</span> max<span class="punctuation token">)</span> <span class="punctuation token">{</span>
   min <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">ceil</span><span class="punctuation token">(</span>min<span class="punctuation token">)</span><span class="punctuation token">;</span>
   max <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">floor</span><span class="punctuation token">(</span>max<span class="punctuation token">)</span><span class="punctuation token">;</span>
   <span class="keyword token">return</span> Math<span class="punctuation token">.</span><span class="function token">floor</span><span class="punctuation token">(</span>Math<span class="punctuation token">.</span><span class="function token">random</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="operator token">*</span> <span class="punctuation token">(</span>max <span class="operator token">-</span> min<span class="punctuation token">)</span><span class="punctuation token">)</span> <span class="operator token">+</span> min<span class="punctuation token">;</span> </code>//不含最大值，含最小值<code class="language-js">
-<span class="punctuation token">}</span></code></pre>
+<span class="punctuation token">}</span></code></code></pre>
 <p></p>
 <div class="note">
 <p>也许很容易想到用 <code>Math.round()</code> 来实现，但是这会导致你的随机数处于一个不均匀的分布，这可能不符合你的需求。</p>
 </div>
 <h3 id="得到一个两数之间的随机整数，包括两个数在内">得到一个两数之间的随机整数，包括两个数在内</h3>
 <p>上一个例子提到的函数 <code>getRandomInt()</code> 结果范围包含了最小值，但不含最大值。如果你的随机结果需要同时包含最小值和最大值，怎么办呢?  <code>getRandomIntInclusive()</code> 函数可以实现。</p>
-<pre class="brush: js line-numbers language-js"><code class="language-js"><span class="keyword token">function</span> <span class="function token">getRandomIntInclusive</span><span class="punctuation token">(</span>min<span class="punctuation token">,</span> max<span class="punctuation token">)</span> <span class="punctuation token">{</span>
+<pre><code  class="language-javascript"><code class="language-js"><span class="keyword token">function</span> <span class="function token">getRandomIntInclusive</span><span class="punctuation token">(</span>min<span class="punctuation token">,</span> max<span class="punctuation token">)</span> <span class="punctuation token">{</span>
   min <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">ceil</span><span class="punctuation token">(</span>min<span class="punctuation token">)</span><span class="punctuation token">;</span>
   max <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">floor</span><span class="punctuation token">(</span>max<span class="punctuation token">)</span><span class="punctuation token">;</span>
   <span class="keyword token">return</span> Math<span class="punctuation token">.</span><span class="function token">floor</span><span class="punctuation token">(</span>Math<span class="punctuation token">.</span><span class="function token">random</span><span class="punctuation token">(</span><span class="punctuation token">)</span> <span class="operator token">*</span> <span class="punctuation token">(</span>max <span class="operator token">-</span> min <span class="operator token">+</span> <span class="number token">1</span><span class="punctuation token">)</span><span class="punctuation token">)</span> <span class="operator token">+</span> min<span class="punctuation token">;</span> <span class="comment token">//含最大值，含最小值 </span>
-<span class="punctuation token">}</span></code></pre>
+<span class="punctuation token">}</span></code></code></pre>
 <p> </p>
 <h2 id="规范">规范</h2>
 <p> </p>