react function component typescript code example

Example 1: react tsx component example

import React from 'react';

interface Props {
}

const App: React.FC<Props> = (props) => {
  return (
    <div><div/>
  );
};

export default App;

Example 2: react functional component typescript

import React from 'react';

interface Props {
  
}

export const App: React.FC<Props> = (props) => {
  return (
    <>
     <SomeComponent/>
    </>
  );
};

Example 3: react typescript props

// Declare the type of the props
type CarProps = {
  name: string;
  brand: string;
  price;
}

// usage 1
const Car: React.FC<CarProps> = (props) => {
  const { name, brand, price } = props;
  // some logic
}

// usage 2
const Car: React.FC<CarProps> = ({ name, brand, price }) => {
	// some logic
}

Example 4: 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 5: How to use Function Components in React TypeScript

// Function Component ( with props and default props ):

import React from "react";

type Props = {

  linkFirst: string,

  routeFirst: string,

  head?: string,

  linkSecond?: string,

  routeSecond?: string

};
/* Default props appear when no value for the prop 
is present when component is being called */

const DefaultProps = {
  head: "Navbar Head not found"
};

const Navbar: React.FC <Props> = (props) => {
  return (
	<div>
		<nav>
		{ props.head }
			<ul>
			<li> 
			<a href={ props.routeFirst }> {props.linkFirst} </a>
			<li> 
			<a href= { props.routeSecond }> {props.linkSecond} </a>
			</li>
   			</ul>
		</nav>
	</div>
  );
};
/* Initializing DefaultProps constant to defaultProps 
so that this constant works. */

Navbar.defaultProps = DefaultProps;
export default Navbar;

Example 6: typescript cheatsheet

enum Color {Red, Green, Blue = 4}
let c: Color = Color.Green