diff --git a/src/App.tsx b/src/App.tsx
index 017957182..f0bc7e6cf 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -8,53 +8,117 @@ import { PostsList } from './components/PostsList';
 import { PostDetails } from './components/PostDetails';
 import { UserSelector } from './components/UserSelector';
 import { Loader } from './components/Loader';
+import { useEffect, useState } from 'react';
+import { User } from './types/User';
+import { Post } from './types/Post';
+import { getUserPosts, getUsers } from './utils/fetchClient';
 
-export const App = () => (
-  <main className="section">
-    <div className="container">
-      <div className="tile is-ancestor">
-        <div className="tile is-parent">
-          <div className="tile is-child box is-success">
-            <div className="block">
-              <UserSelector />
-            </div>
+export const App = () => {
+  const [users, setUsers] = useState<User[]>([]);
 
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
+  const [selectedUser, setSelectedUser] = useState<User | null>(null);
+  const [userPosts, setUserPosts] = useState<Post[]>([]);
 
-              <Loader />
+  const [selectedPost, setSelectedPost] = useState<Post | null>(null);
 
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
-              </div>
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
+
+  const [showForm, setShowForm] = useState(false);
+
+  useEffect(() => {
+    getUsers()
+      .then(setUsers)
+      .catch(newError => {
+        throw newError;
+      });
+  }, []);
 
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+  useEffect(() => {
+    if (selectedUser) {
+      setLoading(true);
+
+      getUserPosts(selectedUser.id)
+        .then(setUserPosts)
+        .catch(() => setError('Something went wrong!'))
+        .finally(() => setLoading(false));
+    }
+  }, [selectedUser]);
+
+  return (
+    <main className="section">
+      <div className="container">
+        <div className="tile is-ancestor">
+          <div className="tile is-parent">
+            <div className="tile is-child box is-success">
+              <div className="block">
+                <UserSelector
+                  users={users}
+                  setSelectedUser={setSelectedUser}
+                  selectedUser={selectedUser}
+                  setSelectedPost={setSelectedPost}
+                />
               </div>
 
-              <PostsList />
+              <div className="block" data-cy="MainContent">
+                {!selectedUser && (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                )}
+
+                {!loading &&
+                  !error &&
+                  selectedUser &&
+                  (userPosts.length > 0 ? (
+                    <PostsList
+                      userPosts={userPosts}
+                      setSelectedPost={setSelectedPost}
+                      setShowForm={setShowForm}
+                      selectedPost={selectedPost}
+                    />
+                  ) : (
+                    <div
+                      className="notification is-warning"
+                      data-cy="NoPostsYet"
+                    >
+                      No posts yet
+                    </div>
+                  ))}
+
+                {loading && <Loader />}
+
+                {error && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    {error}
+                  </div>
+                )}
+              </div>
             </div>
           </div>
-        </div>
-
-        <div
-          data-cy="Sidebar"
-          className={classNames(
-            'tile',
-            'is-parent',
-            'is-8-desktop',
-            'Sidebar',
-            'Sidebar--open',
-          )}
-        >
-          <div className="tile is-child box is-success ">
-            <PostDetails />
+          <div
+            data-cy="Sidebar"
+            className={classNames(
+              'tile',
+              'is-parent',
+              'is-8-desktop',
+              'Sidebar',
+              { 'Sidebar--open': selectedPost },
+            )}
+          >
+            <div className="tile is-child box is-success">
+              {selectedPost && (
+                <PostDetails
+                  selectedPost={selectedPost}
+                  showForm={showForm}
+                  setShowForm={setShowForm}
+                />
+              )}
+            </div>
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};
diff --git a/src/components/NewCommentForm.tsx b/src/components/NewCommentForm.tsx
index 73a8a0b45..21877ce2e 100644
--- a/src/components/NewCommentForm.tsx
+++ b/src/components/NewCommentForm.tsx
@@ -1,8 +1,81 @@
-import React from 'react';
+import classNames from 'classnames';
+import React, { useState } from 'react';
+import { CommentData } from '../types/Comment';
+
+type Props = {
+  buttonLoader: boolean;
+  addFunction: (newComment: CommentData) => Promise<void>;
+};
+
+export const NewCommentForm: React.FC<Props> = ({
+  buttonLoader,
+  addFunction,
+}) => {
+  const [name, setName] = useState('');
+  const [nameError, setNameError] = useState(false);
+  const [email, setEmail] = useState('');
+  const [emailError, setEmailError] = useState(false);
+  const [text, setText] = useState('');
+  const [textError, setTextError] = useState(false);
+
+  const handleNameChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setName(event.target.value);
+    setNameError(false);
+  };
+
+  const handleEmailChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setEmail(event.target.value);
+    setEmailError(false);
+  };
+
+  const handleTextChange = (event: React.ChangeEvent<HTMLTextAreaElement>) => {
+    setText(event.target.value);
+    setTextError(false);
+  };
+
+  const checkQuery = (
+    query: string,
+    setQuery: (query: string) => void,
+    error: (value: boolean) => void,
+  ) => {
+    const normalizedQuery = query.trim();
+    const isError = normalizedQuery.length === 0 || !query;
+
+    error(isError);
+    setQuery(normalizedQuery);
+
+    return isError;
+  };
+
+  const onSubmit = (event: React.FormEvent | React.MouseEvent) => {
+    event.preventDefault();
+
+    const isNameError = checkQuery(name, setName, setNameError);
+    const isEmailError = checkQuery(email, setEmail, setEmailError);
+    const isTextError = checkQuery(text, setText, setTextError);
+
+    if (isNameError || isEmailError || isTextError) {
+      return;
+    }
+
+    const newComment = addFunction({ name, email, body: text });
+
+    if (newComment instanceof Promise) {
+      newComment.then(() => setText(''));
+    }
+  };
+
+  const clearFunction = () => {
+    setEmail('');
+    setEmailError(false);
+    setName('');
+    setNameError(false);
+    setText('');
+    setTextError(false);
+  };
 
-export const NewCommentForm: React.FC = () => {
   return (
-    <form data-cy="NewCommentForm">
+    <form data-cy="NewCommentForm" onSubmit={event => onSubmit(event)}>
       <div className="field" data-cy="NameField">
         <label className="label" htmlFor="comment-author-name">
           Author Name
@@ -14,24 +87,29 @@ export const NewCommentForm: React.FC = () => {
             name="name"
             id="comment-author-name"
             placeholder="Name Surname"
-            className="input is-danger"
+            value={name}
+            onChange={handleNameChange}
+            className={classNames('input', { 'is-danger': nameError })}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-user" />
           </span>
+          {nameError && (
+            <>
+              <span
+                className="icon is-small is-right has-text-danger"
+                data-cy="ErrorIcon"
+              >
+                <i className="fas fa-exclamation-triangle" />
+              </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+              <p className="help is-danger" data-cy="ErrorMessage">
+                Name is required
+              </p>
+            </>
+          )}
         </div>
-
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Name is required
-        </p>
       </div>
 
       <div className="field" data-cy="EmailField">
@@ -41,28 +119,34 @@ 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"
+            onChange={handleEmailChange}
+            value={email}
+            className={classNames('input', { 'is-danger': emailError })}
           />
 
           <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>
-        </div>
+          {emailError && (
+            <>
+              <span
+                className="icon is-small is-right has-text-danger"
+                data-cy="ErrorIcon"
+              >
+                <i className="fas fa-exclamation-triangle" />
+              </span>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Email is required
-        </p>
+              <p className="help is-danger" data-cy="ErrorMessage">
+                Email is required
+              </p>
+            </>
+          )}
+        </div>
       </div>
 
       <div className="field" data-cy="BodyField">
@@ -75,25 +159,40 @@ export const NewCommentForm: React.FC = () => {
             id="comment-body"
             name="body"
             placeholder="Type comment here"
-            className="textarea is-danger"
+            onChange={handleTextChange}
+            value={text}
+            className={classNames('input', { 'is-danger': textError })}
           />
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Enter some text
-        </p>
+        {textError && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Enter some text
+          </p>
+        )}
       </div>
 
       <div className="field is-grouped">
         <div className="control">
-          <button type="submit" className="button is-link is-loading">
+          <button
+            type="submit"
+            onClick={event => {
+              onSubmit(event);
+            }}
+            className={classNames('button is-link', {
+              'is-loading': buttonLoader,
+            })}
+          >
             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"
+            onClick={clearFunction}
+            className="button is-link is-light"
+          >
             Clear
           </button>
         </div>
diff --git a/src/components/PostDetails.tsx b/src/components/PostDetails.tsx
index 2f82db916..33e31a3f0 100644
--- a/src/components/PostDetails.tsx
+++ b/src/components/PostDetails.tsx
@@ -1,106 +1,141 @@
-import React from 'react';
+import React, { useEffect, useState } from 'react';
 import { Loader } from './Loader';
 import { NewCommentForm } from './NewCommentForm';
+import { Post } from '../types/Post';
+import { addComment, deleteComment, getComments } from '../utils/fetchClient';
+import { Comment, CommentData } from '../types/Comment';
+
+type Props = {
+  selectedPost: Post | null;
+  showForm: boolean;
+  setShowForm: (value: boolean) => void;
+};
+
+export const PostDetails: React.FC<Props> = ({
+  selectedPost,
+  showForm,
+  setShowForm,
+}) => {
+  const [comments, setComments] = useState<Comment[]>([]);
+
+  const [buttonLoader, setButtonLoader] = useState(false);
+  const [commentLoader, setCommentLoader] = useState(false);
+  const [commentError, setCommentError] = useState('');
+
+  const errorMessage = 'Something went wrong';
+
+  useEffect(() => {
+    if (selectedPost) {
+      setCommentLoader(true);
+
+      getComments(selectedPost.id)
+        .then(setComments)
+        .catch(() => setCommentError(errorMessage))
+        .finally(() => setCommentLoader(false));
+    }
+  }, [selectedPost, setComments]);
+
+  const addFunction = ({ name, email, body }: CommentData) => {
+    setButtonLoader(true);
+
+    const postId = selectedPost?.id || 0;
+
+    return addComment({ postId, name, email, body })
+      .then(newComment => setComments([...comments, newComment]))
+      .catch(() => {
+        setCommentError(errorMessage);
+      })
+      .finally(() => setButtonLoader(false));
+  };
+
+  const deleteFunction = (commentId: number) => {
+    setComments(currentCommenst => {
+      return currentCommenst.filter(comment => comment.id !== commentId);
+    });
+
+    deleteComment(commentId);
+  };
 
-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
-          </p>
+          <p data-cy="PostBody">{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>
-
-          <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>
-            </div>
+          {commentLoader && <Loader />}
 
-            <div className="message-body" data-cy="CommentBody">
-              Some comment
-            </div>
-          </article>
-
-          <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">
-              One more comment
-            </div>
-          </article>
-
-          <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>
+          {commentError && (
+            <div className="notification is-danger" data-cy="CommentsError">
+              {errorMessage}
             </div>
+          )}
 
-            <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>
-        </div>
+          {!commentLoader && !commentError && (
+            <>
+              {comments.length > 0 ? (
+                <>
+                  <p className="title is-4">Comments:</p>
+
+                  {comments.map(comment => (
+                    <article
+                      key={comment.id}
+                      className="message is-small"
+                      data-cy="Comment"
+                    >
+                      <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"
+                          onClick={() => deleteFunction(comment.id)}
+                          aria-label="delete"
+                        >
+                          {/* delete button */}
+                        </button>
+                      </div>
 
-        <NewCommentForm />
+                      <div className="message-body" data-cy="CommentBody">
+                        {comment.body}
+                      </div>
+                    </article>
+                  ))}
+                </>
+              ) : (
+                <p className="title is-4" data-cy="NoCommentsMessage">
+                  No comments yet
+                </p>
+              )}
+
+              {showForm ? (
+                <NewCommentForm
+                  buttonLoader={buttonLoader}
+                  addFunction={addFunction}
+                />
+              ) : (
+                <button
+                  data-cy="WriteCommentButton"
+                  type="button"
+                  className="button is-link"
+                  onClick={() => setShowForm(true)}
+                >
+                  Write a comment
+                </button>
+              )}
+            </>
+          )}
+        </div>
       </div>
     </div>
   );
diff --git a/src/components/PostsList.tsx b/src/components/PostsList.tsx
index cf90f04b0..92c0ab2c0 100644
--- a/src/components/PostsList.tsx
+++ b/src/components/PostsList.tsx
@@ -1,86 +1,74 @@
 import React from 'react';
+import { Post } from '../types/Post';
+import classNames from 'classnames';
 
-export const PostsList: React.FC = () => (
-  <div data-cy="PostsList">
-    <p className="title">Posts:</p>
+type Props = {
+  userPosts: Post[];
+  selectedPost: Post | null;
+  setShowForm: (value: boolean) => void;
+  setSelectedPost: (postId: Post | null) => void;
+};
 
-    <table className="table is-fullwidth is-striped is-hoverable is-narrow">
-      <thead>
-        <tr className="has-background-link-light">
-          <th>#</th>
-          <th>Title</th>
-          {/* eslint-disable-next-line jsx-a11y/control-has-associated-label */}
-          <th> </th>
-        </tr>
-      </thead>
+export const PostsList: React.FC<Props> = ({
+  userPosts,
+  selectedPost,
+  setShowForm,
+  setSelectedPost,
+}) => {
+  const openPostFunction = (postToSelect: Post) => {
+    if (selectedPost && selectedPost.id === postToSelect.id) {
+      setSelectedPost(null);
+    } else {
+      setSelectedPost(postToSelect);
+      setShowForm(false);
+    }
+  };
 
-      <tbody>
-        <tr data-cy="Post">
-          <td data-cy="PostId">17</td>
+  const isOpenFunction = (currentPost: Post) => {
+    if (selectedPost && selectedPost.id === currentPost.id) {
+      return true;
+    } else {
+      return false;
+    }
+  };
 
-          <td data-cy="PostTitle">
-            fugit voluptas sed molestias voluptatem provident
-          </td>
+  return (
+    <div data-cy="PostsList">
+      <p className="title">Posts:</p>
 
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
+      <table className="table is-fullwidth is-striped is-hoverable is-narrow">
+        <thead>
+          <tr className="has-background-link-light">
+            <th>#</th>
+            <th>Title</th>
+            {/* eslint-disable-next-line jsx-a11y/control-has-associated-label */}
+            <th> </th>
+          </tr>
+        </thead>
 
-        <tr data-cy="Post">
-          <td data-cy="PostId">18</td>
+        <tbody>
+          {userPosts.map(post => (
+            <tr data-cy="Post" key={post.id}>
+              <td data-cy="PostId">{post.id}</td>
 
-          <td data-cy="PostTitle">
-            voluptate et itaque vero tempora molestiae
-          </td>
+              <td data-cy="PostTitle">{post.title}</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"
+                  onClick={() => openPostFunction(post)}
+                  className={classNames('button is-link', {
+                    'is-light': !isOpenFunction(post),
+                  })}
+                >
+                  {isOpenFunction(post) ? 'Close' : 'Open'}
+                </button>
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+};
diff --git a/src/components/UserSelector.tsx b/src/components/UserSelector.tsx
index c89442841..429cfc047 100644
--- a/src/components/UserSelector.tsx
+++ b/src/components/UserSelector.tsx
@@ -1,16 +1,74 @@
-import React from 'react';
+import React, { useEffect, useRef, useState } from 'react';
+import { User } from '../types/User';
+import classNames from 'classnames';
+import { Post } from '../types/Post';
+
+type Props = {
+  users: User[];
+  selectedUser: User | null;
+  setSelectedUser: (userToSelect: User) => void;
+  setSelectedPost: (postToSelect: Post | null) => void;
+};
+
+export const UserSelector: React.FC<Props> = ({
+  users,
+  selectedUser,
+  setSelectedUser,
+  setSelectedPost,
+}) => {
+  const [menuVisibility, setMenuVisibility] = useState(false);
+
+  const selectUserFunction = (
+    event: React.MouseEvent<HTMLAnchorElement, MouseEvent>,
+    user: User,
+  ) => {
+    event.preventDefault();
+
+    setSelectedUser(user);
+    setSelectedPost(null);
+    setMenuVisibility(false);
+  };
+
+  const dropdownRef = useRef<HTMLDivElement | null>(null);
+
+  const handleClickOutside = (event: MouseEvent) => {
+    if (
+      dropdownRef.current &&
+      !dropdownRef.current.contains(event.target as Node)
+    ) {
+      setMenuVisibility(false);
+    }
+  };
+
+  useEffect(() => {
+    document.addEventListener('mousedown', handleClickOutside);
+
+    return () => {
+      document.removeEventListener('mousedown', handleClickOutside);
+    };
+  }, []);
 
-export const UserSelector: React.FC = () => {
   return (
-    <div data-cy="UserSelector" className="dropdown is-active">
+    <div
+      data-cy="UserSelector"
+      ref={dropdownRef}
+      className={classNames('dropdown', {
+        'is-active': users.length > 0 && menuVisibility,
+      })}
+    >
       <div className="dropdown-trigger">
         <button
           type="button"
           className="button"
+          onClick={() => setMenuVisibility(true)}
           aria-haspopup="true"
           aria-controls="dropdown-menu"
         >
-          <span>Choose a user</span>
+          <span>
+            {selectedUser && selectedUser.name.length > 0
+              ? selectedUser.name
+              : 'Choose a user'}
+          </span>
 
           <span className="icon is-small">
             <i className="fas fa-angle-down" aria-hidden="true" />
@@ -20,21 +78,18 @@ 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
+              key={user.id}
+              href={`user-${user.id}`}
+              onClick={event => selectUserFunction(event, user)}
+              className={classNames('dropdown-item', {
+                'is-active': user.id === selectedUser?.id,
+              })}
+            >
+              {user.name}
+            </a>
+          ))}
         </div>
       </div>
     </div>
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
index feb6915ce..60fcf3d85 100644
--- a/src/utils/fetchClient.ts
+++ b/src/utils/fetchClient.ts
@@ -1,3 +1,7 @@
+import { Comment } from '../types/Comment';
+import { Post } from '../types/Post';
+import { User } from '../types/User';
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 const BASE_URL = 'https://mate.academy/students-api';
 
@@ -38,3 +42,44 @@ export const client = {
   patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
   delete: (url: string) => request(url, 'DELETE'),
 };
+
+export const getUsers = () => {
+  return client.get<User[]>('/users');
+};
+
+export const getUserPosts = (userId: number) => {
+  return client.get<Post[]>(`/posts?userId=${userId}`);
+};
+
+export const getComments = (postId: number) => {
+  return client.get<Comment[]>(`/comments?postId=${postId}`);
+};
+
+export const addComment = ({
+  postId,
+  name,
+  email,
+  body,
+}: Omit<Comment, 'id'>) => {
+  return client.post<Comment>('/comments', { postId, name, email, body });
+};
+
+export const deleteComment = (commentId: number) => {
+  return client.delete(`/comments/${commentId}`);
+};
+
+// export const getTodos = () => {
+//   return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+// };
+
+// export const deleteTodo = (todoId: number) => {
+//   return client.delete(`/todos/${todoId}`);
+// };
+
+// export const createTodo = ({ userId, title, completed }: Omit<Todo, 'id'>) => {
+//   return client.post<Todo>('/todos', { userId, title, completed });
+// };
+
+// export const updateTodo = ({ id, userId, title, completed }: Todo) => {
+//   return client.patch<Todo>(`/todos/${id}`, { userId, title, completed });
+// };