[20190114] react 数据类型验证异常

TypeError: Cannot read property 'string' of undefined

据查从15.5开始 React.PropTypes助手函数已被弃用,改用prop-types 库

import PropTypes from 'prop-types';
 
class Greeting extends React.Component {
  render() {
    return (
      
Hello, {this.props.name}
    );
  }
}
 
Greeting.propTypes = {
  name: PropTypes.string
};

参见 https://blog.csdn.net/Super_LD/article/details/80717232