React component with arrow function

CompArrowFunc.tsx

export class CognitoLogin extends React.Component<
  ICognitoLoginProps,
  ICognitoLoginState
> {
  constructor(props: ICognitoLoginProps) {
    super(props);
    this.state = {
      userInput: __DEV__
        ? {
            email: 'cogtest@mailinator.com',
            password: 'Password1#',
            phone: '+46730555252',
          }
        : { email: undefined, password: undefined },
    };
  }

  onEmailChanged = (email: string | undefined) => {
    const { userInput } = this.state;
    if (_.isNil(email)) {
      return;
    }
    userInput.email = email;
    this.setState({ userInput });
  }
    
    render(){}
}