es6编写reactjs事件处理函数绑定this三种方式

class LoginControl extends React.Component {
  constructor(props) {
    super(props);
    this.handleLoginClick = this.handleLoginClick.bind(this);
    this.handleLogoutClick = this.handleLogoutClick.bind(this);
    this.state = {isLoggedIn: false};
  }

render() {
    return (
      <div onClick={this.handleClick.bind(this)}>ES6方式创建的组件</div>
    );
  }

return (
      <button onClick={(e) => this.handleClick(e)}>
        Click me
      </button>
    );