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docs/javascript/Reference/Global_Objects/Symbol/isConcatSpreadable.html

@@ -31,25 +31,25 @@
 <h2 id="示例">示例</h2>
 <h3 id="数组">数组</h3>
 <p>默认情况下，<a href="Reference/Global_Objects/Array/concat" title="concat() 方法用于合并两个或多个数组。此方法不会更改现有数组，而是返回一个新数组。"><code>Array.prototype.concat()</code></a> 展开其元素连接到结果中：</p>
-<pre class="brush: js">var alpha = ['a', 'b', 'c'], 
+<pre><code  class="language-javascript">var alpha = ['a', 'b', 'c'], 
     numeric = [1, 2, 3]; 
 
 var alphaNumeric = alpha.concat(numeric); 
 
 console.log(alphaNumeric); // 结果: ['a', 'b', 'c', 1, 2, 3]
-</pre>
+</code></pre>
 <p>设置<code>Symbol.isConcatSpreadable</code>为<code>false</code>：</p>
-<pre class="brush: js">var alpha = ['a', 'b', 'c'], 
+<pre><code  class="language-javascript">var alpha = ['a', 'b', 'c'], 
     numeric = [1, 2, 3]; 
 
 numeric[Symbol.isConcatSpreadable] = false;
 var alphaNumeric = alpha.concat(numeric); 
 
 console.log(alphaNumeric); // 结果: ['a', 'b', 'c', [1, 2, 3] ]
-</pre>
+</code></pre>
 <h3 id="Array-like_对象">Array-like 对象</h3>
 <p>对于类数组 (array-like)对象，默认不展开。期望展开其元素用于连接，需要设置 <code>Symbol.isConcatSpreadable</code> 为true：</p>
-<pre class="brush: js">var x = [1, 2, 3];
+<pre><code  class="language-javascript">var x = [1, 2, 3];
 
 var fakeArray = { 
   [Symbol.isConcatSpreadable]: true, 
@@ -59,7 +59,7 @@ var fakeArray = {
 }
 
 x.concat(fakeArray); // [1, 2, 3, "hello", "world"]
-</pre>
+</code></pre>
 <h2 id="技术标准">技术标准</h2>
 <table class="standard-table">
 <tbody>