react proptypes react component code example

Example 1: install proptypes react

npm install --save prop-types

Example 2: react proptypes

import PropTypes from 'prop-types';

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

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

Example 3: proptypes objectof

Component.propTypes = {

  booleanObjectProp: PropTypes.objectOf(
    PropTypes.bool
  ),
  
  multipleObjectProp: PropTypes.objectOf(
    PropTypes.oneOfType([
      PropType.func,
      PropType.number,
      PropType.string,
      PropType.instanceOf(Person)
    ])
  )
  
}

Example 4: react proptypes example

// proptypes using class component
Detaljer.PropTypes = {
  detaljer: PropTypes.string.isRequired,
  feilkode: PropTypes.string,
  removeEvent: PropTypes.string.isRequired
};

// proptypes using function component
Detaljer.propTypes = {
  detaljer: PropTypes.string.isRequired,
  feilkode: PropTypes.string,
  removeEvent: PropTypes.string.isRequired
};

Example 5: proptypes.objectof

Pokemon.propTypes = {
  pokemon: PropTypes.shape({
    name: PropTypes.string,
    id: PropTypes.number,
    base_stamina: PropTypes.number,
    base_defense: PropTypes.number
  })
}

Example 6: proptypes

Basic types:
- PropTypes.any: The prop can be of any data type
- PropTypes.bool: The prop should be a Boolean
- PropTypes.number: The prop should be a number
- PropTypes.string: The prop should be a string
- PropTypes.func: The prop should be a function
- PropTypes.array: The prop should be an array
- PropTypes.object: The prop should be an object
- PropTypes.symbol: The prop should be a symbol

Renderable types:
- PropTypes.node: The prop should be anything that can be rendered by React
  a number, string, element, or array (or fragment) containing these types
- PropTypes.element: The prop should be a React element

Instance types:
- PropTypes.instanceOf(class): The prop should be an instance of class

Multiple types:
- PropTypes.oneOf: The prop is limited to a specified set of values,
  treating it like an enum
- PropTypes.oneOfType: The prop should be one of a specified set of
  types, behaving like a union of types
  
Collection types:
- PropTypes.arrayOf: ensures that the prop is an array in which all 
  items match the specified type.
- PropTypes.objectOf: ensures that the prop is an object in which all 
  property values match the specified type.
- PropTypes.shape: ensures that the prop is an object that contains a set 
  of specified keys with values of the specified types.
- PropTypes.exact: use for strict (or exact) object matching