gistfile1.txt

          <ReactCSSTransitionGroup transitionName="fadeIn">
            {this.state.loading && <Loading key={0} />}
            {this.state.error &&
              <div className="alert alert-block alert-danger" key={1}>
                Error: { messages[ this.state.error ] }
              </div>}
            {this.state.success &&
              <div className="alert alert-block alert-success" key={2}>
                Success!
              </div>}
          </ReactCSSTransitionGroup>