title: How to reset a React-Bootstrap Form after submit?
body: <p>I added React-Bootstrap to my app. So I change a basic form with React-Bootstrap components. </p>
  
  <p>I can't reset a form after a submit.</p>
  
  <p>Here is my simplified code: </p>
  
  <pre><code>import React from 'react';
  import { Form, FormGroup, FormControl, ControlLabel, Button } from 'react-bootstrap';
  
  class MyForm extends React.Component {
  
      onSubmit( event ) {
          event.preventDefault();
          const textAreaValue = this.textArea.value;
          console.log("textAreaValue : ", textAreaValue);
  
  
          // some code here...
  
          // ERROR HERE (but it works if I 
          // replace bootstrap &lt;Form&gt; 
          // component by a simple &lt;form&gt;
          this.messageForm.reset();
      }
  
      render() {
  
          return (
              &lt;Form
                  className="form"
                  ref={ form =&gt; this.messageForm = form }
                  onSubmit={ this.onSubmit.bind( this ) }
              &gt;
  
                  &lt;FormGroup controlId="formControlsTextarea"&gt;
                      &lt;ControlLabel&gt;My Control Label&lt;/ControlLabel&gt;
                      &lt;FormControl
                          required
                          inputRef={ input =&gt; this.textArea = input }
                          componentClass="textarea" /&gt;
                  &lt;/FormGroup&gt;
  
                  &lt;Button type="submit"&gt;ok&lt;/Button&gt;
              &lt;/Form&gt;
          );
  
      }
  
  }
  export default MyForm;
  </code></pre>
  
  <p>I could continue to use a normal  then it works but I wonder how to use that one component of React-Boostrap.</p>
  
  <p>Has someone an idea?</p>
  
  <hr>
  
  <p>The error:</p>
  
  <pre><code>× TypeError: this.messageForm.reset is not a function
  </code></pre>
  
  <p>When I log this.messageForm it's a React-Bootstrap component. I also tested with <code>inputRef</code> instead of <code>ref</code> but it doesn't work</p>