image onClick failing in React

class MyComponent extends React.Component {      
  
     render () {
        const imageClick = () => {
          console.log('Click');
        } 
        return (
           <div>
              <img src={require('/myfolder/myimage.png')} onClick={() => imageClick()} />
           </div>
        );
     }
  }

I've been playing with create-react-app and noticed that logo had pointer-events css style set to none which disables all the clicks. Not sure if that is your case. Just try to override that style in your img:

<img src='/myfolder/myimage.png' onClick={this.imageClick} style={{"pointer-events": "all"}} />

Your code looks fine and here is the working sample with image onClick. I have tested on my machine Chrome 16.0 working fine.

<!DOCTYPE html>
<html>
  <head>
    <title>React Image Click</title>
    <meta charset="utf-8">
    <script crossorigin src="https://unpkg.com/[email protected]/umd/react.development.js"></script>
    <script crossorigin src="https://unpkg.com/[email protected]/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
    <script type="text/jsx">
      class MyComponent extends React.Component {
          imageClick = () => {
            console.log('Click!!!!');
          }       

          render () {
            return (
               <div>
                  <img src='/myfolder/myimage.png' onClick={this.imageClick} />
               </div>
            );
          }
      }

      ReactDOM.render(
        <MyComponent />, 
        document.getElementById("app")
      );
    </script>
  </head>
  <body>
    <div id="app"></div>
  </body>
</html>

Well it does work in my case :

class MyComponent extends React.Component {

  imageClick = () => {
    console.log('Click!!!!');
  }       

  render () {
    return (
      <div>
        <img src='http://www.libpng.org/pub/png/img_png/obj_64x64.png' onClick={this.imageClick} />
      </div>
    );
  }
}

ReactDOM.render(<MyComponent />, document.body);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

And the same version with a prop (url) passed to the component, as well as as state modification triggered when you click the image, as those two are important in React :

class MyComponent extends React.Component {
  constructor(props){
    super(props);
    this.state = {
      clicked : false
    }
  }

  imageClick = () => {
    console.log('Click!!!!');
    this.setState({
      clicked: true
    })
  }       

  render () {
    return (
      <div>
        <img src={ this.props.url } onClick={this.imageClick} />
        {
          this.state.clicked &&
          <div>You clicked me!</div>
        }
      </div>
    );
  }
}

ReactDOM.render(<MyComponent url="http://www.libpng.org/pub/png/img_png/obj_64x64.png" />, document.body);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

Hope this helps!