title: Why doesn't transform-style: preserve-3d work?
body: <p>As far as I understand, <code>transform-style: preserve-3d;</code> property applies to the element and allows one to be positioned in a three-dimensional space. But I don't see any difference with and without <code>transform-style: preserve-3d;</code> property.</p>
  <p>So, I have two examples.</p>
  <ol>
  <li>With using <code>transform-style: preserve-3d;</code></li>
  </ol>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.parent {
    width: 60%;
    height: 300px;
    border: 1px solid black;
    display: flex;
    justify-content: space-around;
    perspective: 600px;
  }
  
  .child {
    width: 50px;
    height: 50px;
    background: yellowgreen;
    display: inline-block;
    transform: rotateY(45deg);
    transform-style: preserve-3d;
  }
  
  .child:hover {
    transform: rotateX(-360deg);
  }
  &lt;div class="parent"&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="parent"&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  <ol start="2">
  <li>Without using <code>transform-style: preserve-3d;</code></li>
  </ol>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.parent {
    width: 60%;
    height: 300px;
    border: 1px solid black;
    display: flex;
    justify-content: space-around;
    perspective: 600px;
  }
  
  .child {
    width: 50px;
    height: 50px;
    background: yellowgreen;
    display: inline-block;
    transform: rotateY(45deg);
  }
  
  .child:hover {
    transform: rotateX(-360deg);
  }
  &lt;div class="parent"&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="parent"&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
    &lt;div class="child"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>So, what's the difference? As for me, these two examples look the same. Thank you in advance</p>