title: Reactjs issues during Initial Animation
body: <p>Still i am getting error - </p>
  
  <blockquote>
    <p>Failed prop type: transitionLeaveTimeout wasn't supplied to
    ReactCSSTransitionGroup: this can cause unreliable animations and
    won't be supported in a future version of React</p>
  </blockquote>
  
  <p>My render looks -</p>
  
  <pre><code>var ReactCSSTransitionGroup = require('react-addons-css-transition-group');
  
  render(){
          const {...others} = this.props;
          return(&lt;div id="navigation"&gt;
              &lt;img id="openNav" onClick={this.handleClick} src={this.state.source}/&gt;
               {this.state.clicked ?
                   &lt;ReactCSSTransitionGroup transitionName="example" transitionAppear={true} transitionAppearTimeout={500}&gt;
                      &lt;Navigation {...others} /&gt;
                   &lt;/ReactCSSTransitionGroup&gt;: false}
              &lt;/div&gt;
          )
      }
  </code></pre>
  
  <blockquote>
    <p>"react": "^15.2.1",</p>
  </blockquote>
  
  <p>i dont know where is the problem...</p>