In this lesson, we look at where we came from with refs in React. Starting with the deprecated string ref pattern, callback refs, and then how to use the new `createRef()` method in React **16.3**. Additional Resources: [refs and the dom](https://reactjs.org/docs/refs-and-the-dom.html https://reactjs.org/blog/2018/03/29/react-v-16-3.html)