Error handling in React can be difficult. Where exactly do you handle errors? If a component handles a JavaScript exception and sets an error state on the component to true, how do you reset this state? In React 16, there are error boundaries. Error boundaries are created by implementing the componentDidCatch() lifecycle method in a component. This component can then serve as the error boundary by wrapping other components. If any of the wrapped components throws an exception, the error boundary component can render alternative content.

Having error boundaries in place like this allows you to structure your components in a way that best suits your application. You can read more about error boundaries here: https://reactjs.org/docs/error-boundaries.html.