<p dir="auto">The cat picture links are not rendering in either Firefox or Safari even if I specify the URL in my address bar.</p>
<p dir="auto">From my current lesson: challenges/use-the-bootstrap-grid-to-put-elements-side-by-side</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content=" &lt;a href=&quot;#&quot;&gt;&lt;img class=&quot;smaller-image thick-green-border&quot; src=&quot;https://bit.ly/fcc-relaxing-cat&quot; alt=&quot;A cute orange cat lying on its back. &quot;&gt;&lt;/a&gt;

  &lt;img src=&quot;https://bit.ly/fcc-running-cats&quot; class=&quot;img-responsive&quot; alt=&quot;Three kittens running towards the camera. &quot;&gt;
"><pre class="notranslate"><code class="notranslate"> &lt;a href="#"&gt;&lt;img class="smaller-image thick-green-border" src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back. "&gt;&lt;/a&gt;

  &lt;img src="https://bit.ly/fcc-running-cats" class="img-responsive" alt="Three kittens running towards the camera. "&gt;

</code></pre></div>
<h4 dir="auto">Challenge Name</h4>

<p dir="auto">Steamroller</p>
<h4 dir="auto">Issue Description</h4>

<p dir="auto">do not know why it does not let me through this challenge .</p>
<h4 dir="auto">Browser Information</h4>

<p dir="auto">every result is right .</p>
<ul dir="auto">
<li>Browser Name, Version:  chrome .</li>
<li>Operating System:  mac os</li>
<li>Mobile, Desktop, or Tablet:  Desktop</li>
</ul>
<h4 dir="auto">Your Code</h4>

<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="
function steamrollArray(arr) {
  // I'm a steamroller, baby
  
  for(var i=0;i&lt;arr.length;i++){
    if(!Array.isArray(arr[i])){
      retArr.push(arr[i]);
    }else{
      retArr.concat(steamrollArray(arr[i]));
    }
  }
  return retArr;
}

var retArr = [];

steamrollArray([1, [2], [3, [[4]]]]);

 
 "><pre class="notranslate"><span class="pl-k">function</span> <span class="pl-en">steamrollArray</span><span class="pl-kos">(</span><span class="pl-s1">arr</span><span class="pl-kos">)</span> <span class="pl-kos">{</span>
  <span class="pl-c">// I'm a steamroller, baby</span>
  
  <span class="pl-k">for</span><span class="pl-kos">(</span><span class="pl-k">var</span> <span class="pl-s1">i</span><span class="pl-c1">=</span><span class="pl-c1">0</span><span class="pl-kos">;</span><span class="pl-s1">i</span><span class="pl-c1">&lt;</span><span class="pl-s1">arr</span><span class="pl-kos">.</span><span class="pl-c1">length</span><span class="pl-kos">;</span><span class="pl-s1">i</span><span class="pl-c1">++</span><span class="pl-kos">)</span><span class="pl-kos">{</span>
    <span class="pl-k">if</span><span class="pl-kos">(</span><span class="pl-c1">!</span><span class="pl-v">Array</span><span class="pl-kos">.</span><span class="pl-en">isArray</span><span class="pl-kos">(</span><span class="pl-s1">arr</span><span class="pl-kos">[</span><span class="pl-s1">i</span><span class="pl-kos">]</span><span class="pl-kos">)</span><span class="pl-kos">)</span><span class="pl-kos">{</span>
      <span class="pl-s1">retArr</span><span class="pl-kos">.</span><span class="pl-en">push</span><span class="pl-kos">(</span><span class="pl-s1">arr</span><span class="pl-kos">[</span><span class="pl-s1">i</span><span class="pl-kos">]</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
    <span class="pl-kos">}</span><span class="pl-k">else</span><span class="pl-kos">{</span>
      <span class="pl-s1">retArr</span><span class="pl-kos">.</span><span class="pl-en">concat</span><span class="pl-kos">(</span><span class="pl-en">steamrollArray</span><span class="pl-kos">(</span><span class="pl-s1">arr</span><span class="pl-kos">[</span><span class="pl-s1">i</span><span class="pl-kos">]</span><span class="pl-kos">)</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
    <span class="pl-kos">}</span>
  <span class="pl-kos">}</span>
  <span class="pl-k">return</span> <span class="pl-s1">retArr</span><span class="pl-kos">;</span>
<span class="pl-kos">}</span>

<span class="pl-k">var</span> <span class="pl-s1">retArr</span> <span class="pl-c1">=</span> <span class="pl-kos">[</span><span class="pl-kos">]</span><span class="pl-kos">;</span>

<span class="pl-en">steamrollArray</span><span class="pl-kos">(</span><span class="pl-kos">[</span><span class="pl-c1">1</span><span class="pl-kos">,</span> <span class="pl-kos">[</span><span class="pl-c1">2</span><span class="pl-kos">]</span><span class="pl-kos">,</span> <span class="pl-kos">[</span><span class="pl-c1">3</span><span class="pl-kos">,</span> <span class="pl-kos">[</span><span class="pl-kos">[</span><span class="pl-c1">4</span><span class="pl-kos">]</span><span class="pl-kos">]</span><span class="pl-kos">]</span><span class="pl-kos">]</span><span class="pl-kos">)</span><span class="pl-kos">;</span>

 
 </pre></div>
<h4 dir="auto">Screenshot</h4>