typescript type for react component code example

Example 1: typescript react class component

import * as React from 'react';

export interface TestProps {
    count: number;
}
 
export interface TestState {
    count: number;
}
 
class Test extends React.Component<TestProps, TestState> {
    state = { count:0  }
    render() { 
        return ( <h2>this is test</h2> );
    }
}
 
export default Test;

Example 2: TYPESCript props class component

class Test extends Component<PropsType,StateType> {
  constructor(props : PropsType){
    	super(props)
  }
  
  render(){
   	console.log(this.props) 
    return (
     	<p>this.props.whatever</p> 
    )
  }
  
};

Example 3: ts react props type

type Props = {
  size: string;
}

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