title: Why is there no onchange for `<Input>` in Ant design
body: <p>I know I must be missing something very simple but why is there no <code>onChange</code> for <code>&lt;Input&gt;</code> tag of <code>Ant design</code>?</p>
  
  <p>I would like the update the value of an input.</p>
  
  <p>I assumed there was something like an <code>onChange</code>, since I was able to use <code>onChange</code> with <code>DatePicker</code> and <code>handleChange</code> <code>DropDown</code>; but I guess I assumed wrong</p>
  
  <p>When I looked at the docs, there is a <code>onPressEnter</code> callback, but that is not really going to help me.</p>
  
  <p>I tried the following:</p>
  
  <pre><code>   &lt;Input
       placeholder="Flight name"
       size="large"
       value={this.state.someVal}
     /&gt;
  </code></pre>
  
  <p>But this just gave me an input that I could not type in.</p>
  
  <p>So to reiterate:</p>
  
  <ol>
  <li>Why is there no <code>onChange</code> for <code>&lt;Input&gt;</code> tag of <code>Ant design</code>?</li>
  <li>More importantly, how do I get the value of the <code>&lt;Input&gt;</code> tag?</li>
  </ol>
  
  <p>Thanks.</p>