diff --git a/src/App.tsx b/src/App.tsx
index db56b44b0..ffd2131c7 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState, useEffect } from 'react';
 import 'bulma/bulma.sass';
 import '@fortawesome/fontawesome-free/css/all.css';
 import './App.scss';
@@ -8,8 +8,56 @@ import { PostsList } from './components/PostsList';
 import { PostDetails } from './components/PostDetails';
 import { UserSelector } from './components/UserSelector';
 import { Loader } from './components/Loader';
+import { client } from './utils/fetchClient';
+import { User } from './types/User';
+import { Post } from './types/Post';
 
 export const App: React.FC = () => {
+  const [users, setUsers] = useState<User[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [isDropDownActive, setIsDropDownActive] = useState(false);
+  const [selectedUser, setSelectedUser] = useState<User | null>(null);
+  const [usersPosts, setUsersPosts] = useState<Post[]>([]);
+  const [isLoading, setIsLoading] = useState(false);
+  const [selectedPost, setSelectedPost] = useState<Post | null>(null);
+  const [isCommentButtonClicked, setIsCommentButtonClicked] = useState(false);
+
+  const getAllUsers = () => {
+    return client.get<User[]>('/users')
+      .catch(() => {
+        setErrorMessage('Something went wrong!');
+      });
+  };
+
+  useEffect(() => {
+    getAllUsers()
+      .then(usersFromServer => {
+        if (usersFromServer) {
+          setUsers(usersFromServer);
+        }
+      });
+  }, []);
+
+  const getUsersPosts = () => {
+    return client.get<Post[]>(`/posts?userId=${selectedUser?.id}`)
+      .catch(() => {
+        setErrorMessage('Something went wrong!');
+      });
+  };
+
+  useEffect(() => {
+    if (selectedUser) {
+      setIsLoading(true);
+      getUsersPosts()
+        .then(postsFromServer => {
+          if (postsFromServer) {
+            setUsersPosts(postsFromServer);
+          }
+        })
+        .finally(() => setIsLoading(false));
+    }
+  }, [selectedUser]);
+
   return (
     <main className="section">
       <div className="container">
@@ -17,28 +65,59 @@ export const App: React.FC = () => {
           <div className="tile is-parent">
             <div className="tile is-child box is-success">
               <div className="block">
-                <UserSelector />
+                <UserSelector
+                  users={users}
+                  setIsDropDownActive={setIsDropDownActive}
+                  isDropDownActive={isDropDownActive}
+                  setSelectedUser={setSelectedUser}
+                  selectedUser={selectedUser}
+                  setSelectedPost={setSelectedPost}
+                />
               </div>
 
               <div className="block" data-cy="MainContent">
-                <p data-cy="NoSelectedUser">
-                  No user selected
-                </p>
+                {!selectedUser && (
+                  <p data-cy="NoSelectedUser">
+                    No user selected
+                  </p>
+                )}
 
-                <Loader />
+                {isLoading && <Loader />}
 
-                <div
-                  className="notification is-danger"
-                  data-cy="PostsLoadingError"
-                >
-                  Something went wrong!
-                </div>
+                {errorMessage && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    {errorMessage}
+                  </div>
+                )}
 
-                <div className="notification is-warning" data-cy="NoPostsYet">
-                  No posts yet
-                </div>
+                {(!usersPosts.length
+                && selectedUser
+                && !errorMessage
+                && !isLoading
+                && !isDropDownActive
+                ) && (
+                  <div
+                    className="notification is-warning"
+                    data-cy="NoPostsYet"
+                  >
+                    No posts yet
+                  </div>
+                )}
 
-                <PostsList />
+                {(usersPosts.length > 0
+                && selectedUser
+                && !isLoading
+                ) && (
+                  <PostsList
+                    usersPosts={usersPosts}
+                    selectedPost={selectedPost}
+                    setSelectedPost={setSelectedPost}
+                    setIsCommentButtonClicked={setIsCommentButtonClicked}
+                  />
+                )}
               </div>
             </div>
           </div>
@@ -50,12 +129,18 @@ export const App: React.FC = () => {
               'is-parent',
               'is-8-desktop',
               'Sidebar',
-              'Sidebar--open',
+              { 'Sidebar--open': selectedPost !== null },
             )}
           >
-            <div className="tile is-child box is-success ">
-              <PostDetails />
-            </div>
+            {selectedPost !== null && (
+              <div className="tile is-child box is-success ">
+                <PostDetails
+                  selectedPost={selectedPost}
+                  isCommentButtonClicked={isCommentButtonClicked}
+                  setIsCommentButtonClicked={setIsCommentButtonClicked}
+                />
+              </div>
+            )}
           </div>
         </div>
       </div>
diff --git a/src/components/NewCommentForm.tsx b/src/components/NewCommentForm.tsx
index 73a8a0b45..6d931c4d4 100644
--- a/src/components/NewCommentForm.tsx
+++ b/src/components/NewCommentForm.tsx
@@ -1,8 +1,131 @@
-import React from 'react';
+import React, { useState } from 'react';
+import classNames from 'classnames';
+import { Post } from '../types/Post';
+import { client } from '../utils/fetchClient';
+import { Comment } from '../types/Comment';
+
+type Props = {
+  selectedPost: Post | null,
+  setPostsComments: React.Dispatch<React.SetStateAction<Comment[]>>,
+  setCommentErrorMessage: (value: string) => void,
+};
+
+export const NewCommentForm: React.FC<Props> = ({
+  selectedPost,
+  setPostsComments,
+  setCommentErrorMessage,
+}) => {
+  const [isFormLoading, setIsFormLoading] = useState(false);
+  const [commentName, setCommentName] = useState('');
+  const [commentEmail, setCommentEmail] = useState('');
+  const [commentText, setCommentText] = useState('');
+  const [formError, setFormError] = useState({
+    name: '',
+    email: '',
+    text: '',
+  });
+
+  const isEmptyField = !commentText.length
+  || !commentEmail.length
+  || !commentName.length;
+
+  const handleNameChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setCommentName(event.target.value);
+    setFormError({
+      ...formError,
+      name: '',
+    });
+  };
+
+  const handleEmailChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setCommentEmail(event.target.value);
+    setFormError({
+      ...formError,
+      email: '',
+    });
+  };
+
+  const handleTextChange = (event: React.ChangeEvent<HTMLTextAreaElement>) => {
+    setCommentText(event.target.value);
+    setFormError({
+      ...formError,
+      text: '',
+    });
+  };
+
+  const createComment = ({
+    postId,
+    name,
+    email,
+    body,
+  }: Omit<Comment, 'id'>) => {
+    return client.post<Comment>('/comments', {
+      postId, name, email, body,
+    });
+  };
+
+  const addComment = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    if (!commentName) {
+      setFormError(rest => ({
+        ...rest,
+        name: 'Name is required',
+      }));
+    }
+
+    if (!commentEmail) {
+      setFormError(rest => ({
+        ...rest,
+        email: 'Email is required',
+      }));
+    }
+
+    if (!commentText) {
+      setFormError(rest => ({
+        ...rest,
+        text: 'Enter some text',
+      }));
+    }
+
+    if (selectedPost?.id && !isEmptyField) {
+      setIsFormLoading(true);
+
+      createComment({
+        postId: selectedPost?.id,
+        name: commentName.trim(),
+        email: commentEmail.trim(),
+        body: commentText.trim(),
+      })
+        .then(newComment => {
+          setPostsComments(currentComments => [...currentComments, newComment]);
+        })
+        .catch(() => {
+          setCommentErrorMessage('Can not to load comments');
+        })
+        .finally(() => {
+          setCommentText('');
+          setIsFormLoading(false);
+        });
+    }
+  };
+
+  const onClear = () => {
+    setFormError({
+      name: '',
+      email: '',
+      text: '',
+    });
+
+    setCommentEmail('');
+    setCommentName('');
+    setCommentText('');
+  };
 
-export const NewCommentForm: React.FC = () => {
   return (
-    <form data-cy="NewCommentForm">
+    <form
+      data-cy="NewCommentForm"
+      onSubmit={(event) => addComment(event)}
+    >
       <div className="field" data-cy="NameField">
         <label className="label" htmlFor="comment-author-name">
           Author Name
@@ -14,24 +137,30 @@ export const NewCommentForm: React.FC = () => {
             name="name"
             id="comment-author-name"
             placeholder="Name Surname"
-            className="input is-danger"
+            className={classNames('input', { 'is-danger': formError.name })}
+            value={commentName}
+            onChange={handleNameChange}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-user" />
           </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {formError.name && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Name is required
-        </p>
+        {formError.name && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {formError.name}
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="EmailField">
@@ -41,28 +170,34 @@ export const NewCommentForm: React.FC = () => {
 
         <div className="control has-icons-left has-icons-right">
           <input
-            type="text"
+            type="email"
             name="email"
             id="comment-author-email"
             placeholder="email@test.com"
-            className="input is-danger"
+            className={classNames('input', { 'is-danger': formError.email })}
+            value={commentEmail}
+            onChange={handleEmailChange}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-envelope" />
           </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {formError.email && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Email is required
-        </p>
+        {formError.email && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {formError.email}
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="BodyField">
@@ -75,25 +210,38 @@ export const NewCommentForm: React.FC = () => {
             id="comment-body"
             name="body"
             placeholder="Type comment here"
-            className="textarea is-danger"
+            className={classNames('textarea', { 'is-danger': formError.text })}
+            value={commentText}
+            onChange={handleTextChange}
           />
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Enter some text
-        </p>
+        {formError.text && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            {formError.text}
+          </p>
+        )}
       </div>
 
       <div className="field is-grouped">
         <div className="control">
-          <button type="submit" className="button is-link is-loading">
+          <button
+            type="submit"
+            className={classNames('button is-link', {
+              'is-loading': isFormLoading,
+            })}
+          >
             Add
           </button>
         </div>
 
         <div className="control">
           {/* eslint-disable-next-line react/button-has-type */}
-          <button type="reset" className="button is-link is-light">
+          <button
+            type="reset"
+            className="button is-link is-light"
+            onClick={onClear}
+          >
             Clear
           </button>
         </div>
diff --git a/src/components/PostDetails.tsx b/src/components/PostDetails.tsx
index ace945f0a..64b9f5fc4 100644
--- a/src/components/PostDetails.tsx
+++ b/src/components/PostDetails.tsx
@@ -1,117 +1,149 @@
-import React from 'react';
+import React, { useEffect, useState } from 'react';
 import { Loader } from './Loader';
 import { NewCommentForm } from './NewCommentForm';
+import { Comment } from '../types/Comment';
+import { Post } from '../types/Post';
+import { client } from '../utils/fetchClient';
+
+type Props = {
+  selectedPost: Post | null,
+  isCommentButtonClicked: boolean,
+  setIsCommentButtonClicked: (value: boolean) => void,
+};
+
+export const PostDetails: React.FC<Props> = ({
+  selectedPost,
+  isCommentButtonClicked,
+  setIsCommentButtonClicked,
+}) => {
+  const [isCommentsLoading, setIsCommentsLoading] = useState(false);
+  const [commentErrorMessage, setCommentErrorMessage] = useState('');
+  const [postsComments, setPostsComments] = useState<Comment[]>([]);
+
+  const commentButtonHandler = () => {
+    setIsCommentButtonClicked(true);
+  };
+
+  const getPostsComments = () => {
+    return client.get<Comment[]>(`/comments?postId=${selectedPost?.id}`)
+      .catch(() => {
+        setCommentErrorMessage('Something went wrong!');
+      });
+  };
+
+  useEffect(() => {
+    setIsCommentsLoading(true);
+    getPostsComments()
+      .then(comentsFromServer => {
+        if (comentsFromServer) {
+          setPostsComments(comentsFromServer);
+        }
+      })
+      .finally(() => setIsCommentsLoading(false));
+  }, [selectedPost]);
+
+  const removeComment = (id: number) => {
+    return client.delete(`/comments/${id}`);
+  };
+
+  const deleteCommentHandler = (id: number) => {
+    setPostsComments(prew => prew.filter(curentComment => (
+      id !== curentComment.id
+    )));
+
+    removeComment(id)
+      .catch(() => {
+        setCommentErrorMessage('delete error');
+      });
+  };
 
-export const PostDetails: React.FC = () => {
   return (
     <div className="content" data-cy="PostDetails">
       <div className="content" data-cy="PostDetails">
         <div className="block">
           <h2 data-cy="PostTitle">
-            #18: voluptate et itaque vero tempora molestiae
+            {`#${selectedPost?.id}: ${selectedPost?.title}`}
           </h2>
 
           <p data-cy="PostBody">
-            eveniet quo quis
-            laborum totam consequatur non dolor
-            ut et est repudiandae
-            est voluptatem vel debitis et magnam
+            {selectedPost?.body}
           </p>
         </div>
 
         <div className="block">
-          <Loader />
-
-          <div className="notification is-danger" data-cy="CommentsError">
-            Something went wrong
-          </div>
-
-          <p className="title is-4" data-cy="NoCommentsMessage">
-            No comments yet
-          </p>
+          {isCommentsLoading && <Loader />}
 
-          <p className="title is-4">Comments:</p>
-
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
+          {commentErrorMessage && (
+            <div className="notification is-danger" data-cy="CommentsError">
+              Something went wrong
             </div>
+          )}
 
-            <div className="message-body" data-cy="CommentBody">
-              Some comment
-            </div>
-          </article>
+          {(!postsComments.length
+          && !commentErrorMessage
+          && !isCommentsLoading
+          ) && (
+            <p className="title is-4" data-cy="NoCommentsMessage">
+              No comments yet
+            </p>
+          )}
+          {(postsComments.length > 0
+          && !commentErrorMessage
+          && !isCommentsLoading
+          ) && (
+            <p className="title is-4">Comments:</p>
+          )}
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a
-                href="mailto:misha@mate.academy"
-                data-cy="CommentAuthor"
-              >
-                Misha Hrynko
-              </a>
-
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
+          {(!isCommentsLoading && postsComments.length > 0) && (
+            postsComments.map(comment => (
+              <article
+                className="message is-small"
+                data-cy="Comment"
+                key={comment.id}
               >
-                delete button
-              </button>
-            </div>
-            <div
-              className="message-body"
-              data-cy="CommentBody"
-            >
-              One more comment
-            </div>
-          </article>
+                <div className="message-header">
+                  <a href={`mailto:${comment.email}`} data-cy="CommentAuthor">
+                    {comment.name}
+                  </a>
+                  <button
+                    data-cy="CommentDelete"
+                    type="button"
+                    className="delete is-small"
+                    aria-label="delete"
+                    onClick={() => deleteCommentHandler(comment.id)}
+                  >
+                    delete button
+                  </button>
+                </div>
 
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a
-                href="mailto:misha@mate.academy"
-                data-cy="CommentAuthor"
-              >
-                Misha Hrynko
-              </a>
-
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
+                <div className="message-body" data-cy="CommentBody">
+                  {comment.body}
+                </div>
+              </article>
+            )))}
 
-            <div className="message-body" data-cy="CommentBody">
-              {'Multi\nline\ncomment'}
-            </div>
-          </article>
-
-          <button
-            data-cy="WriteCommentButton"
-            type="button"
-            className="button is-link"
-          >
-            Write a comment
-          </button>
+          {(!isCommentButtonClicked
+          && !commentErrorMessage
+          && !isCommentsLoading
+          ) && (
+            <button
+              data-cy="WriteCommentButton"
+              type="button"
+              className="button is-link"
+              onClick={commentButtonHandler}
+            >
+              Write a comment
+            </button>
+          )}
         </div>
 
-        <NewCommentForm />
+        {(isCommentButtonClicked && !isCommentsLoading) && (
+          <NewCommentForm
+            selectedPost={selectedPost}
+            setPostsComments={setPostsComments}
+            setCommentErrorMessage={setCommentErrorMessage}
+          />
+        )}
       </div>
     </div>
   );
diff --git a/src/components/PostsList.tsx b/src/components/PostsList.tsx
index 6e6efc0f3..5e6e506b3 100644
--- a/src/components/PostsList.tsx
+++ b/src/components/PostsList.tsx
@@ -1,85 +1,69 @@
 import React from 'react';
+import classNames from 'classnames';
+import { Post } from '../types/Post';
 
-export const PostsList: React.FC = () => (
-  <div data-cy="PostsList">
-    <p className="title">Posts:</p>
+type Props = {
+  usersPosts: Post[],
+  setSelectedPost: (value: Post | null) => void,
+  selectedPost: Post | null,
+  setIsCommentButtonClicked: (value: boolean) => void,
+};
 
-    <table className="table is-fullwidth is-striped is-hoverable is-narrow">
-      <thead>
-        <tr className="has-background-link-light">
-          <th>#</th>
-          <th>Title</th>
-          <th> </th>
-        </tr>
-      </thead>
+export const PostsList: React.FC<Props> = ({
+  usersPosts,
+  setSelectedPost,
+  selectedPost,
+  setIsCommentButtonClicked,
+}) => {
+  const selectPostHandler = (post: Post) => {
+    if (selectedPost !== post) {
+      setSelectedPost(post);
+      setIsCommentButtonClicked(false);
+    } else {
+      setSelectedPost(null);
+    }
+  };
 
-      <tbody>
-        <tr data-cy="Post">
-          <td data-cy="PostId">17</td>
+  return (
+    <div data-cy="PostsList">
+      <p className="title">Posts:</p>
 
-          <td data-cy="PostTitle">
-            fugit voluptas sed molestias voluptatem provident
-          </td>
+      <table className="table is-fullwidth is-striped is-hoverable is-narrow">
+        <thead>
+          <tr className="has-background-link-light">
+            <th>#</th>
+            <th>Title</th>
+            <th> </th>
+          </tr>
+        </thead>
 
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
+        <tbody>
+          {usersPosts.map(post => (
+            <tr data-cy="Post" key={post.id}>
+              <td data-cy="PostId">{post.id}</td>
 
-        <tr data-cy="Post">
-          <td data-cy="PostId">18</td>
+              <td data-cy="PostTitle">
+                {post.title}
+              </td>
 
-          <td data-cy="PostTitle">
-            voluptate et itaque vero tempora molestiae
-          </td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link"
-            >
-              Close
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">19</td>
-          <td data-cy="PostTitle">adipisci placeat illum aut reiciendis qui</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">20</td>
-          <td data-cy="PostTitle">doloribus ad provident suscipit at</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-      </tbody>
-    </table>
-  </div>
-);
+              <td className="has-text-right is-vcentered">
+                <button
+                  type="button"
+                  data-cy="PostButton"
+                  className={classNames('button is-link', {
+                    'is-light': selectedPost !== post,
+                  })}
+                  onClick={() => selectPostHandler(post)}
+                >
+                  {selectedPost !== post
+                    ? 'Open'
+                    : 'Close'}
+                </button>
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+};
diff --git a/src/components/UserSelector.tsx b/src/components/UserSelector.tsx
index cb83a8f68..dc08bb18b 100644
--- a/src/components/UserSelector.tsx
+++ b/src/components/UserSelector.tsx
@@ -1,19 +1,72 @@
-import React from 'react';
+import React, { useEffect, useRef } from 'react';
+import classNames from 'classnames';
+import { User } from '../types/User';
+import { Post } from '../types/Post';
+
+type Props = {
+  users: User[],
+  setIsDropDownActive: (value: boolean) => void,
+  isDropDownActive: boolean,
+  setSelectedUser: (value: User) => void,
+  selectedUser: User | null,
+  setSelectedPost: (value: Post | null) => void,
+};
+
+export const UserSelector: React.FC<Props> = ({
+  users,
+  setIsDropDownActive,
+  isDropDownActive,
+  setSelectedUser,
+  selectedUser,
+  setSelectedPost,
+}) => {
+  const dropDownHandler = () => setIsDropDownActive(!isDropDownActive);
+
+  const dropdown = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const closeDropdown = (e: MouseEvent) => {
+      if (dropdown.current
+        && isDropDownActive
+        && !dropdown.current.contains(e.target as Node)) {
+        setIsDropDownActive(false);
+      }
+    };
+
+    document.addEventListener('click', closeDropdown);
+
+    return () => {
+      document.removeEventListener('click', closeDropdown);
+    };
+  }, [isDropDownActive]);
+
+  const selectUserHandler = (user: User) => {
+    if (selectedUser !== user) {
+      setSelectedUser(user);
+      setIsDropDownActive(false);
+      setSelectedPost(null);
+    }
+  };
 
-export const UserSelector: React.FC = () => {
   return (
     <div
       data-cy="UserSelector"
-      className="dropdown is-active"
+      className={classNames('dropdown', { 'is-active': isDropDownActive })}
     >
-      <div className="dropdown-trigger">
+      <div
+        className="dropdown-trigger"
+        ref={dropdown}
+      >
         <button
           type="button"
           className="button"
           aria-haspopup="true"
           aria-controls="dropdown-menu"
+          onClick={dropDownHandler}
         >
-          <span>Choose a user</span>
+          {selectedUser === null
+            ? <span>Choose a user</span>
+            : <span>{selectedUser.name}</span>}
 
           <span className="icon is-small">
             <i className="fas fa-angle-down" aria-hidden="true" />
@@ -23,11 +76,18 @@ export const UserSelector: React.FC = () => {
 
       <div className="dropdown-menu" id="dropdown-menu" role="menu">
         <div className="dropdown-content">
-          <a href="#user-1" className="dropdown-item">Leanne Graham</a>
-          <a href="#user-2" className="dropdown-item is-active">Ervin Howell</a>
-          <a href="#user-3" className="dropdown-item">Clementine Bauch</a>
-          <a href="#user-4" className="dropdown-item">Patricia Lebsack</a>
-          <a href="#user-5" className="dropdown-item">Chelsey Dietrich</a>
+          {users.map(user => (
+            <a
+              href={`#user-${user.id}`}
+              className={classNames('dropdown-item', {
+                'is-active': selectedUser?.id === user.id,
+              })}
+              onClick={() => selectUserHandler(user)}
+              key={user.id}
+            >
+              {user.name}
+            </a>
+          ))}
         </div>
       </div>
     </div>
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
index 93208df11..feb6915ce 100644
--- a/src/utils/fetchClient.ts
+++ b/src/utils/fetchClient.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 const BASE_URL = 'https://mate.academy/students-api';
 
 // a promise resolved after a given delay