propTypes and defaultProps

[greenat92]

propTypes and defaultProps are static properties, declared as high as possible within the component code. They should be immediately visible to other devs reading the file, since they serve as documentation.

For example

 import { string, object } from 'prop-types'
 static propTypes = {
    model: object.isRequired,
    title: string
  }
 
  static defaultProps = {
    model: {
      id: 0
    },
    title: 'Your Name'
  }