Can I inspect the proptypes of react component class if given an instance?

问题

I'd love to access the propTypes of a class, e.g.

var Button = React.createClass({
  propTypes: {
    text: React.PropTypes.string,
    href: React.PropTypes.string
  },
  ...
})

...

var ButtonPropTypes = Button.propTypes

I'd expect to see something along the lines of

{ text: function(){...}, href: function(){...} }

But instead I get undefined. What am I doing wrong, and how can I get at the proptypes?

回答1:

You should be able to access the proptypes statically as you are doing in your code. I put an example on jsfiddle and you can should be able to see the proptypes being printed in the console (they are functions)

var Hello = React.createClass({
    getDefaultProps: function() {
        return {
          testing: 'default value'
        };
    },
    propTypes: {
        testing: React.PropTypes.string
    },
    render: function() {
        return (
            <div>        
                <div>{this.props.name}</div>
            </div>
        )
    }
});

React.render(<Hello name="World" />, document.getElementById('container'));

console.log(Hello.propTypes)

https://jsfiddle.net/fj7ax0qr/

来源：https://stackoverflow.com/questions/32110766/can-i-inspect-the-proptypes-of-react-component-class-if-given-an-instance