remove span tag in zh-CN

1 files changed, 4 insertions, 4 deletions

diff --git a/files/zh-cn/web/javascript/reference/global_objects/array/flat/index.html b/files/zh-cn/web/javascript/reference/global_objects/array/flat/index.html
index 5346c65b82..2f37e8f49b 100644
--- a/files/zh-cn/web/javascript/reference/global_objects/array/flat/index.html
+++ b/files/zh-cn/web/javascript/reference/global_objects/array/flat/index.html
@@ -81,10 +81,10 @@ const flattened = arr =&gt; [].concat(...arr);</code></pre>
 <pre class="brush: js notranslate"><code>// 使用 reduce、concat 和递归展开无限多层嵌套的数组
 var arr1 = [1,2,3,[1,2,3,4, [2,3,4]]];
 </code>
-<code class="language-js"><span class="keyword token">function</span> <span class="function token">flatDeep</span><span class="punctuation token">(</span><span class="parameter token">arr<span class="punctuation token">,</span> d <span class="operator token">=</span> <span class="number token">1</span></span><span class="punctuation token">)</span> <span class="punctuation token">{</span>
-   <span class="keyword token">return</span> d <span class="operator token">&gt;</span> <span class="number token">0</span> <span class="operator token">?</span> arr<span class="punctuation token">.</span><span class="function token">reduce</span><span class="punctuation token">(</span><span class="punctuation token">(</span><span class="parameter token">acc<span class="punctuation token">,</span> val</span><span class="punctuation token">)</span> <span class="operator token">=&gt;</span> acc<span class="punctuation token">.</span><span class="function token">concat</span><span class="punctuation token">(</span>Array<span class="punctuation token">.</span><span class="function token">isArray</span><span class="punctuation token">(</span>val<span class="punctuation token">)</span> <span class="operator token">?</span> <span class="function token">flatDeep</span><span class="punctuation token">(</span>val<span class="punctuation token">,</span> d <span class="operator token">-</span> <span class="number token">1</span><span class="punctuation token">)</span> <span class="punctuation token">:</span> val<span class="punctuation token">)</span><span class="punctuation token">,</span> <span class="punctuation token">[</span><span class="punctuation token">]</span><span class="punctuation token">)</span>
-                <span class="punctuation token">:</span> arr<span class="punctuation token">.</span><span class="function token">slice</span><span class="punctuation token">(</span><span class="punctuation token">)</span><span class="punctuation token">;</span>
-<span class="punctuation token">}</span><span class="punctuation token">;</span></code>
+<code class="language-js">function flatDeep(arr, d = 1) {
+   return d &gt; 0 ? arr.reduce((acc, val) =&gt; acc.concat(Array.isArray(val) ? flatDeep(val, d - 1) : val), [])
+                : arr.slice();
+};</code>
 <code>
 flatDeep(arr1, Infinity);
 // [1, 2, 3, 1, 2, 3, 4, 2, 3, 4]</code></pre>