Dafydd Thomas

React function component in TypeScript

react typescript

For the past couple of months I've been learning TypeScript and using it in a NextJS app.

At first it was a little daunting, but I've come to enjoy using the simple features it gives around types.

Here's what a typical function component may look like this:

import React, { useState } from "react";
import PropTypes from "prop-types";

const Component = ({ darkMode, title, advancedMode }) => {
const [name, setName] = useState("");
const [isHuman, setIsHuman] = useState(false);

return <div></div>;

Component.propTypes = {
darkMode: PropTypes.bool,
title: PropTypes.string,
advancedMode: PropTypes.bool,

export default Component;

Here's what the TypeScript version of the above component looks like:

import React, { FC, useState } from "react";

interface Props {
darkMode: boolean;
title: string;
advancedMode?: boolean;

const Component: FC<Props> = ({ darkMode, title, advancedMode }) => {
const [name, setName] = useState<string>("");
const [isHuman, setIsHuman] = useState<boolean>(false);

return <div></div>;

export default Component;