2.3.1 getlnitialState和getDefaultProps错误

[富士康质检员]

class Sample extends React.Component {
  constructor(props) {
    super(props);
    this.state = { foo: "’bar " };
  }
});
Sample.defaultProps = {
  return { sampleProp: 0 }
};

报错
正确：

class Sample extends React.Component {
  constructor(props) {
    super(props);
    this.state = { foo: "’bar " };
  }
}
Sample.defaultProps = {
  sampleProp: 0
};