Exercise

1. Open exercise on codesandbox. This exercise builds on the previous exercise using the catchError() operator. Note that I've added a new message constant variable that is a reference to an HTMLDivElement that displays an error message. By default, the div element is hidden using the hidden class on the element. In the catchError() method I have removed the hidden class.
2. Your task is to use the finalize() operator to add the hidden class back to the div element after 5000 milliseconds.