title: Is there a native Javascript implementation of jQuery's document.ready()?
body: <pre><code> $(document).onload()
  </code></pre>
  
  <p>it's internally implemented by window.onload event</p>
  
  <p>then what about </p>
  
  <pre><code> $(document).ready()
  </code></pre>
  
  <p>what's the native javascript to implement it?</p>