title: Create element "in memory", like jQuery does, in D3.js
body: <p>Instead of doing</p>
  
  <pre><code>d3.select("body").append("svg")
  </code></pre>
  
  <p>, which most d3.js examples do, I'd like to create an element, and NOT attach it to body or anything right away.</p>
  
  <p>Kind of like <code>$('&lt;div/&gt;')</code> in jQuery.</p>
  
  <p>How can I do this?</p>