title: How to make Unity WebGL app placed on simple html page load asynchronously?
body: <p>I created a game in Unity and regularly exported it for WebGL.
  The index.html page that comes with this export contains these parts of code:</p>
  
  <p>script definition</p>
  
  <pre><code>&lt;script src="Build/UnityLoader.js"&gt;&lt;/script&gt;
  &lt;script&gt; 
    var gameInstance = UnityLoader.instantiate("gameContainer", "Build/1.0.json");
  &lt;/script&gt;
  </code></pre>
  
  <p>and using of that script</p>
  
  <pre><code>&lt;div class="gameContainer"&gt;
      &lt;div id="gameContainer" style="width: 960px; height: 600px; margin: auto"/&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>inside of plain html code.</p>
  
  <p>Now I realized, that when I put more content on that page, everything freeze until the game is loaded.
  What is the adequate solution for that?
  Is there a simple way, how to make this game load async? </p>
  
  <p>Thanks a lot for any answers!</p>