carmen

my-app/src/App.css

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+.App {
+  text-align: center;
+}
+
+.container{
+  display: flex;
+  justify-content: center;
+  text-align: center;
+
+}
+.boardSquare{
+  background-color: #d5bef3;
+  border-style:solid;
+  height:200px;
+  width:200px;
+};
+
+.board{
+  display: flex;
+  flex-direction: row;
+  flex-wrap: wrap;
+  align-items: center;
+}
+
+.boardRow{
+  display: flex;
+  flex-direction: row;
+  flex-wrap: wrap;
+  align-items: center;
+};

my-app/src/App.js

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+import React from 'react';
+import logo from './logo.svg';
+import Board from './Board';
+import './App.css';
+
+export const BoardSquareContext = React.createContext();
+export const BoardSetSquareContext = React.createContext();
+
+function App() {
+  const [boardSquares, setBoardSquares] = React.useState(
+    new Array(9).fill(null)
+  );
+
+  return (
+    <div className="App">
+    <h1>A tic-tac-toe game</h1>
+    <BoardSquareContext.Provider value={boardSquares}>
+      <BoardSetSquareContext.Provider value={setBoardSquares}>
+        <Board />
+      </BoardSetSquareContext.Provider>
+    </BoardSquareContext.Provider>
+
+    </div>
+  );
+}
+
+export default App;

my-app/src/App.test.js

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+import React from 'react';
+import { render } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  const { getByText } = render(<App />);
+  const linkElement = getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});

my-app/src/Board.js

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+import React from 'react';
+import logo from './logo.svg';
+import Square from './Square';
+import {BoardSquareContext, BoardSetSquareContext} from './App.js';
+
+// main board component
+function Board() {
+
+  const boardSquares = React.useContext(BoardSquareContext);
+  const setBoardSquares = React.useContext(BoardSetSquareContext);
+
+  // state for the next turn
+  const [isXPlayer, setXPlayer] = React.useState(true);
+
+  // fucntion for when a sqaure is clicked
+  const whenClicked = index => {
+    // spread the items in boardSquare to new array to make a copy
+    const squares = [...boardSquares];
+    // check if square has a value
+    if (squares[index]) return;
+    // add next turn
+    squares[index] = isXPlayer ? 'X' : 'O';
+
+    // set the new state of the board squares
+    setBoardSquares(squares);
+
+    // change the state for the next turn
+    setXPlayer(!isXPlayer);
+  };
+
+  // rendering the squares using square component
+  const renderSquare = index => {
+    return (
+      <Square id={index} value={boardSquares[index]} onClick={() => whenClicked(index)} />
+    );
+  };
+
+  // create the gameStatus to determine next player and winner
+  let gameStatus;
+  const winner = findWinner(boardSquares);
+  gameStatus = winner
+    ? `Winner is ${winner}!`
+    : `It is${isXPlayer ? 'X' : 'O'}'s Turn...'`;
+
+  return (
+    <div className="board">
+      <h2 className={gameStatus}>{gameStatus}</h2>
+      <div className="boardRow">
+        {renderSquare(0)}
+        {renderSquare(1)}
+        {renderSquare(2)}
+      </div>
+      <div className="boardRow">
+        {renderSquare(3)}
+        {renderSquare(4)}
+        {renderSquare(5)}
+      </div>
+      <div className="boardRow">
+        {renderSquare(6)}
+        {renderSquare(7)}
+        {renderSquare(8)}
+      </div>
+    </div>
+  )
+}
+
+// function to determine winner
+const findWinner = (squares) => {
+  // winning combinations
+
+  const winningCombos = [
+    [0, 1, 2],
+    [3, 4, 5],
+    [6, 7, 8],
+    [0, 3, 6],
+    [1, 4, 7],
+    [2, 5, 8],
+    [0, 4, 8],
+    [2, 4, 6],
+  ];
+  for (let i = 0; i < winningCombos.length; i++) {
+    // destructure winningCombos[i] array
+    const [a, b, c] = winningCombos[i];
+    // returning x or o if squares match
+    if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
+      return squares[a];
+    }
+  }
+  // else return null
+  return null;
+}
+
+
+export default Board;

my-app/src/Square.js

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+import React from 'react';
+
+function Square(props) {
+  return (
+    <div className="boardSquare" key={props.id} onClick={props.onClick}>
+      {props.value}
+    </div>
+  );
+}
+
+export default Square

my-app/src/index.css

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+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}

my-app/src/index.js

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+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(
+    <App />,
+  document.getElementById('root')
+);
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();

my-app/src/serviceWorker.js

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+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read https://bit.ly/CRA-PWA
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.0/8 are considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export function register(config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://bit.ly/CRA-PWA'
+          );
+        });
+      } else {
+        // Is not localhost. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl, config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        if (installingWorker == null) {
+          return;
+        }
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the updated precached content has been fetched,
+              // but the previous service worker will still serve the older
+              // content until all client tabs are closed.
+              console.log(
+                'New content is available and will be used when all ' +
+                  'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
+              );
+
+              // Execute callback
+              if (config && config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config && config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl, {
+    headers: { 'Service-Worker': 'script' },
+  })
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      const contentType = response.headers.get('content-type');
+      if (
+        response.status === 404 ||
+        (contentType != null && contentType.indexOf('javascript') === -1)
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready
+      .then(registration => {
+        registration.unregister();
+      })
+      .catch(error => {
+        console.error(error.message);
+      });
+  }
+}

my-app/src/setupTests.js

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+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom/extend-expect';