JAVASCRIPT

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
};

react using proptypes

import React from 'react';
import PropTypes from 'prop-types';

const Example = (props) => {
  return (
    <div>
      <p>Some prop: {props.some}</p>
      <p>Other prop: {props.other}</p>
    </div>
  );
};

Example.propTypes = {
  some: PropTypes.string.isRequired,
  other: PropTypes.number.isRequired
};

export default Example;

ts react props type

type Props = {
  size: string;
}

const Component = ({ size = 'medium' }: Props) => (
  <div className={cn('spinner', size)} />
);

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
};

prop type of react component

type OscarProp = {
  children: React.ReactNode;
};

Type Props Example

function App() {
return (<div>
<Message text="rando text" />
    </div>
);
}

export default App;

type MessageProps ={
text: number

}

function Message({text}: MessageProps)
{

  return(<div>
  {text}
  </div>)
}

/*pop quiz, will the example below work?

type MessageProps ={
text: number

}
 
Answer: no, will produce an error due to wrong type
*/

prop type of react component

type OscarProp = {
  children: React.ReactNode;
};

prop types in react

import PropTypes from 'prop-types'

function HelloWorldComponent({ name }) {
  return (
    <div>Hello, {name}</div>
  )
}

HelloWorldComponent.propTypes = {
  name: PropTypes.string
}

export default HelloWorldComponent

proptypes for a react component

//You can now use `PropTypes.elementType`
// to validate for Component type props

type for object props

type Person = {
  name: {
    first: string;
    last: string;
  };
};