The componentDidCatch life-cycle method is invoked when an exception is thrown in its child component hierarchy. Components which implement componentDidCatch are called Error Boundary components. These components act as catch {} blocks to capture exceptions.

The following example has 3 components
ErrorBoundaryComponent - Implements componentDidCatch, acts as a catch {} block to capture errors in child components.
ChildComponent - Actual UI component, encapsulated in ErrorBoundaryComponent
RootComponent - This is the bootstrap component which launches the application.