Mateus Machado

Thank you, it helped a lot.

import React, { Component, RefObject, createRef } from 'react'; import { render } from 'react-dom'; import './style.css'; import { TweenLite } from "gsap"; interface AppProps {} interface AppState {} class App extends Component<AppProps, AppState> { constructor(props) { super(props); this.box = null; } box: HTMLDivElement; componentDidMount() { TweenLite.to(this.box, 1, {yPercent:100, repeat:-1, yoyo:true}); } render() { return ( <div> <h1>GSAP & React, with typescript sample</h1> <div className="box" ref={e => this.box = e} ></div> </div> ); } } render(<App />, document.getElementById('root'));