example.js

<input onClick={function() {}} />

class Component extends React.Component {
  propTypes = {
    onClick: PropTypes.func,
  }
 
  handleClick = e => {
    // do stuff
    this.props.onClick()
  }
  
  openModal = e => {
    this.setState({ open: true }}
  }
  
  render() {
    <input onClick={this.handleClick} />
  }
}