Showing use of defaultProps

MyComponentDefaultProps.js

import PropTypes from 'prop-types'

export default class MyComponent extends React.Component {

  render() {
    // Render Something
  }
}

// You can declare that a prop is a specific JS type. 
MyComponent.propTypes = {
  text: PropTypes.string,
  content: PropTypes.array,
  onPress: PropTypes.func,
  size: PropTypes.number,
  styles: PropTypes.object,
  isReady: PropTypes.bool,
}

// Default values for props
MyComponent.defaultProps = {
  text: 'Sample Deafult Text',
  content: [],
  size: 0,
  onPress: () => {},
  isReady: false
}