• Pair Stage 2 project
• Due EOD Thursday on December 31st

• Build React components which recieve data through props
• Build container components which recieve data through props
• Build a react component using state
• Pass callback functions to child components and use them to update state

We will create a Tic Tac Toe game which allows users to interact with the screen to add play the classic game. If you are unfamilair with Tic Tac Toe, you can read about it.

You can also play with a working version of the game on github pages!

We have provided you an initial Application Skeleton generated with create-react-app. The application will have the following components:

• Square - This component represents one square in a tic-tac-toe board. It will take in props representing the value to show on the board (x, o, or ''), an id, and a callback function called onClickCallback.
• Board - This component will take a callback function, onClickCallback and a list of 2D array of JavaScript objects with ids, and values and will render Square components each with ids, values and the callback function passed in as props.
• App - This component is the traditional outer component of the React App. The App component will manage the state for the application and track the status for the game including the winner.

Remember to run npm install or yarn to install dependencies into node_modules

We have already implemented some pieces of this project:

• Square.css a css file for styling each square of the game.
• Board.css a css file to style the game board
• App.css a css file to
• App.js a starter App component
  • App.test.js a test file for the App component
• Board.js a starter Board component
  • Board.test.js a test file for the Board component
• Square.js a starter Square component.
  • Square.test.js a test file for the Square component

1. Fork and clone this repo
2. Install this project's dependencies with $ npm install
3. Start the local development server that runs our React project with $ npm start

Update the Board component to render the grid of squares. You will need to complete the generateSquareComponents function in the Board component.

App should pass to Board a 2D array of JavaScript objects and Board should use that to render an array of Square components.

Each Square component should take 2 props at this stage.

• id the Id of the square
• value the value being displayed in the square

We have provided you a function generateSquares in App.js which generates a 2D array of JavaScript objects with Ids and values (blank strings). These should be used to provide data to Board and Square via props.

We have test files to verify the correctness of the Square and Board components. You can run the tests with:

• npm test src/components/Square.test.js
• npm test src/components/Board.test.js

These tests verify that the components show up on the screen when rendered and that the callback function is called when a square is clicked on.

For Wave 2 you should add the functionality to change the value of a square when the user clicks on it.

To do so you will need to pass a callback function from App to Board and on to each square.

You will need to write onClickCallback a callback function to call when the Square is clicked on and pass it through Board to each Square component.

When the user clicks first clicks on a square it should set the square's value to the proper x or o depending on the current player's turn.

We have a group of tests inside App.test.js with a describe titled Wave 2 which runs tests to verify if Xs and Os appear correctly when the squares are clicked on.

For wave 3, you will add the game logic to detect if a player has won or if there is a tie (all squares filled and with no winner). To do this you will complete the checkForWinner method and display the winner in the header section. The game should also cease responding to clicks on the board if the game has a winner.

There are additional tests that you can unskip to verify if a winner is detected. The tests check for:

• If o wins the app has 'Winner is o' appearing on the browser window
• If x wins the app has 'Winner is x' appearin gon the browser window

optional

• If you feel ambitious see if you can add a test to detect ties!
• You can also create a test to ensure that you can't click on squares after a winner is detected!

For wave 4 you will add a button to the App component to reset the game and clear all the game squares.

There are additional tests that you can unskip to verify if a the reset button resets the grid. The tests check for:

• When the reset button (with the text 'Reset Game') is clicked the grid should go back to blank squares. It selects all the <button class="square"></button> elements and verifies that they have no text.
• Immediately after the reset button is clicked, there shouldn't be a 'Winner is o` or x appearing in the browser window.

For an optional bit of fun try to use github pages to deploy your game on the web!

Check out the feedback template which lists the items instructors will be looking for as they evaluate your project.