npm i react-flyup-button

function App() {
  return (
    <div>
      <ScrollToTopButton
        position="left"
        bottom={50}
        left={20}
        width={60}
        height={60}
        borderRadius={10}
        backgroundColor="#007BFF"
        borderColor="#0056b3"
        borderWidth={2}
        smoothScroll={true}
        displayAt={400}
      />
    </div>
  );
}