title: Display select2 as plain input text
body: <p>I'm using <code>select2</code> plugin (latest version 4.0.2) for autocomplete in my probject. I found that <code>select2</code> can be applied only to select control. 
  The main problem is that text input placed as first option of this control (see img below).</p>
  
  <p>Is there any way to have text input placed instead of select control (like typeahead plugin)? </p>
  
  <p>Some of screenshots (actually you can try it <a href="https://select2.github.io/examples.html" rel="nofollow noreferrer">here</a>)</p>
  
  <p><strong>Collapsed</strong> (you can see here only standard select html control with selected option)</p>
  
  <p><a href="https://i.stack.imgur.com/Bk6no.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Bk6no.png" alt="enter image description here"></a></p>
  
  <p><strong>Expanded</strong> (text input place as the first option of select control, text input hidden if select collapsed)</p>
  
  <p><a href="https://i.stack.imgur.com/DegEB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DegEB.png" alt="enter image description here"></a></p>
  
  <p><strong>Typeahead</strong> (applied to directly input text, type query text in the first row that always displayed on the page)</p>
  
  <p><a href="https://i.stack.imgur.com/QFu82.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QFu82.png" alt="enter image description here"></a></p>