title: React bootstrap default selected value for dropdown
body: <p>I was using react-bootstrap library and I wanted to have default <code>selected</code> value.</p>
  <p>I went through their docs and I wasn't able to find anything related to pass/set default value.</p>
  <p>This is how I am currently using</p>
  <pre><code>const dropDownQuestion = (props) =&gt; {
    const { options, upsideEmit, value } = props
    return (
      &lt;DropdownButton
        id=&quot;dropdown-basic-button&quot;
        onSelect={(eventKey) =&gt; upsideEmit(eventKey)}
      &gt;
        {options.map((element) =&gt; (
          &lt;Dropdown.Item key={element.id}&gt;{element.value}&lt;/Dropdown.Item&gt;
        ))}
      &lt;/DropdownButton&gt;
    )
  }
  </code></pre>
  <p>Where <strong>value</strong> happens to be optional <strong>default Value</strong>. Can someone help me how to achieve this with react-bootstrap dropdown?</p>