Typechecking With PropTypes

[pluscai]

Typechecking With PropTypes

React has some built-in typechecking abilities. To run typechecking on the props for a component, you can assign the special propTypes property:

import PropTypes from 'prop-types';

class Greeting extends React.Component {
  render() {
    return (
      <h1>Hello, {this.props.name}</h1>
    );
  }
}

Greeting.propTypes = {
  name: PropTypes.string
};

React自带的类型检测，如例子中的name只能是字符串类型。