React Dynamic List of Posts

Implement the App with ability to show posts of a selected user. Each post can be opened in the sidebar with its comments. There should delete a comment and a form to add new comments.

Here is the working version

1. Learn the utils/fetchClient.ts and use it to interact with the API (tests expect that you each API request is sent after 300 ms delay);
2. Initially the App shows the UserSelector and a paragraph No user selected in the main content block.
   • load users from the API on page load;
   • implement the UserSelector as a dropdown using the given markup;
3. When a user is selected load the user's posts form the API and show them using a table in the main content clock;
   • show the <Loader> while waiting for the API response;
   • show an error notification if posts loading fails;
   • if the user has no posts show the No posts yet notification.
4. Add the Sidebar--open class to the sidebar when a post is selected;
   • the post details should appear there immediately;
   • the post commnets should be loaded from the API;
   • the Loader is shown before comments are loaded;
   • CommentsError notification is show on loading error;
   • NoComments message is shown if the post does not have comments yet;
5. Show the Write a comment button below the comments
   • after click hide the button and show the form to add new comment;
   • the form stays visible until the other post is opened;
   • the form should be implemented as a separate component;
6. The form requires an author's name and email and a comment text.
   • show errors only after the form is submitted;
   • remove an error on the field change;
   • keep the name and email after the successful submit but clear a comment text;
   • The Clear button should also clear all errors;
   • Add the is-loading class to the submit button while waiting for a response;
   • Add the new comment received as a response from the API to the end of the list;
7. Implement comment deletion
   • Delete the commnet immediately not waiting for the server response to improve the UX.
8. (*) Handle Add and Delete errors so the user can retry