added solution

src/App.tsx

@@ -1,25 +1,55 @@
-import React from 'react';
 import './App.css';
 import { getNumbers } from './utils';
-
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
+import { Pagination } from './components/Pagination';
+import { useSearchParams } from 'react-router-dom';
+import React from 'react';
 const items = getNumbers(1, 42).map(n => `Item ${n}`);
 
 export const App: React.FC = () => {
+  const [searchParams, setSearchParams] = useSearchParams();
+
+  const currentPage = Number(searchParams.get('page')) || 1;
+  const perPage = Number(searchParams.get('perPage')) || 5;
+
+  function onPageChange(newPage: number): void {
+    const params = new URLSearchParams(searchParams);
+
+    params.set('page', newPage.toString());
+    setSearchParams(params);
+  }
+
+  function onPerPageChange(newPerPage: number): void {
+    const params = new URLSearchParams(searchParams);
+
+    params.set('perPage', newPerPage.toString());
+    params.set('page', '1');
+    setSearchParams(params);
+  }
+
+  const startIndex = (currentPage - 1) * perPage;
+  const calculatedEndIndex = startIndex + perPage;
+  const endIndex = Math.min(calculatedEndIndex, items.length);
+
   return (
     <div className="container">
       <h1>Items with Pagination</h1>
 
       <p className="lead" data-cy="info">
-        Page 1 (items 1 - 5 of 42)
+        {`Page ${currentPage} (items ${startIndex + 1} - ${endIndex} of ${items.length})`}
       </p>
 
+      {/* зміна items на сторінці */}
       <div className="form-group row">
         <div className="col-3 col-sm-2 col-xl-1">
           <select
             data-cy="perPageSelector"
             id="perPageSelector"
-            className="form-control">
+            className="form-control"
+            onChange={e => {
+              onPerPageChange(Number(e.target.value));
+            }}
+            value={perPage}
+          >
             <option value="3">3</option>
             <option value="5">5</option>
             <option value="10">10</option>
@@ -32,78 +62,20 @@ export const App: React.FC = () => {
         </label>
       </div>
 
-      {/* Move this markup to Pagination */}
-      <ul className="pagination">
-        <li className="page-item disabled">
-          <a
-            data-cy="prevLink"
-            className="page-link"
-            href="#prev"
-            aria-disabled="true">
-            «
-          </a>
-        </li>
-        <li className="page-item active">
-          <a data-cy="pageLink" className="page-link" href="#1">
-            1
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#2">
-            2
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#3">
-            3
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#4">
-            4
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#5">
-            5
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#6">
-            6
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#7">
-            7
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#8">
-            8
-          </a>
-        </li>
-        <li className="page-item">
-          <a data-cy="pageLink" className="page-link" href="#9">
-            9
-          </a>
-        </li>
-        <li className="page-item">
-          <a
-            data-cy="nextLink"
-            className="page-link"
-            href="#next"
-            aria-disabled="false">
-            »
-          </a>
-        </li>
-      </ul>
+      <Pagination
+        total={items.length}
+        perPage={perPage}
+        currentPage={currentPage}
+        onPageChange={onPageChange}
+      />
+
+      {/*Items - список який відображаєтьс на сторінці, змінюється в залежності від вибраної кількості*/}
       <ul>
-        <li data-cy="item">Item 1</li>
-        <li data-cy="item">Item 2</li>
-        <li data-cy="item">Item 3</li>
-        <li data-cy="item">Item 4</li>
-        <li data-cy="item">Item 5</li>
+        {items.slice(startIndex, endIndex).map(item => (
+          <li key={item} data-cy="item">
+            {item}
+          </li>
+        ))}
       </ul>
     </div>
   );

src/components/Pagination/Pagination.tsx

@@ -1 +1,70 @@
-export const Pagination = () => {};
+import { pagesArray } from '../../utils';
+import { Link } from 'react-router-dom';
+
+interface PaginationType {
+  total: number;
+  perPage: number;
+  currentPage?: number;
+  onPageChange?: (page: number) => void;
+}
+
+// total - загальна кількісьть елементів
+// perPage - кількість елементів на сторінці
+// currentPage = 1 - //кількість сторінок яка може бути
+
+export const Pagination = ({
+  total,
+  perPage,
+  currentPage = 1,
+}: PaginationType) => {
+  const pagesAmount = Math.ceil(total / perPage);
+  const pagesCountArray: number[] = pagesArray(pagesAmount);
+
+  return (
+    <ul className="pagination">
+      <li className={currentPage === 1 ? 'page-item disabled' : 'page-item'}>
+        <Link
+          to={`/?page=${currentPage - 1}&perPage=${perPage}`}
+          data-cy="prevLink"
+          className="page-link"
+          aria-disabled={currentPage === 1 ? 'true' : 'false'}
+        >
+          «
+        </Link>
+      </li>
+
+      {pagesCountArray.map(page => (
+        <li
+          className={page === currentPage ? 'page-item active' : 'page-item'}
+          key={page}
+        >
+          <Link
+            to={`/?page=${page}&perPage=${perPage}`}
+            data-cy="pageLink"
+            className="page-link"
+          >
+            {page}
+          </Link>
+        </li>
+      ))}
+      <li
+        className={
+          currentPage === pagesCountArray.length
+            ? 'page-item disabled'
+            : 'page-item'
+        }
+      >
+        <Link
+          to={`/?page=${currentPage < pagesAmount ? currentPage + 1 : pagesAmount}&perPage=${perPage}`}
+          data-cy="nextLink"
+          className="page-link"
+          aria-disabled={
+            currentPage === pagesCountArray.length ? 'true' : 'false'
+          }
+        >
+          »
+        </Link>
+      </li>
+    </ul>
+  );
+};

src/index.tsx

@@ -1,5 +1,10 @@
 import { createRoot } from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
 
 import { App } from './App';
 
-createRoot(document.getElementById('root') as HTMLElement).render(<App />);
+createRoot(document.getElementById('root') as HTMLElement).render(
+  <BrowserRouter>
+    <App />
+  </BrowserRouter>,
+);

src/utils.ts

@@ -7,3 +7,13 @@ export function getNumbers(from: number, to: number): number[] {
 
   return numbers;
 }
+
+export function pagesArray(number: number): number[] {
+  const pages = [];
+
+  for (let i = 1; i <= number; i++) {
+    pages.push(i);
+  }
+
+  return pages;
+}