title: Remove <button>New</button> after 2 seconds
body: <p>I want to be able to remove only New button after two seconds, not <em>Hey</em> buttons.</p>
  <p>・What I tried
  I wrote this code and then the result was all buttons disappeared for sure. Is it able to spot and remove only the button made by JavaScript?</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>  
  
  $('button').html('&lt;em&gt;Hey&lt;/em&gt;');
     
   
  
  let newbtn = '&lt;button&gt;New&lt;/button&gt;';
  
  $('h1').append(newbtn);
  
  setTimeout(()  =&gt; {
    
    $('button').hide();
  }, 2000);</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  
  &lt;head&gt;
      &lt;meta charset="UTF-8"&gt;
      &lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
      &lt;title&gt;jQuery&lt;/title&gt;
      &lt;link rel="stylesheet" href="styles.css"&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
  
      &lt;h1 class="big-title margin-50"&gt;Hello.&lt;/h1&gt;
      &lt;img src="drum.png" alt=""&gt;
      &lt;a href="http://www.google.com"&gt;Search&lt;/a&gt;
      &lt;button&gt;Click Me.&lt;/button&gt;
      &lt;button&gt;Click Me.&lt;/button&gt;
      &lt;button&gt;Click Me.&lt;/button&gt;
      &lt;button&gt;Click Me.&lt;/button&gt;
      &lt;button&gt;Click Me.&lt;/button&gt;
  
      
      
  
  &lt;input type="text" name="" value="    "&gt;
  
  
      &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"&gt;&lt;/script&gt;
      &lt;script src="index.js"&gt;&lt;/script&gt;
  &lt;/body&gt;
  
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>