Initial commit

README.md

@@ -4,7 +4,7 @@ This project was bootstrapped with [Create React App](https://github.com/faceboo
 
 In the project directory, you can run:
 
-### `npm start`
+### `yarn start`
 
 Runs the app in the development mode.<br />
 Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
@@ -12,12 +12,12 @@ Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
 The page will reload if you make edits.<br />
 You will also see any lint errors in the console.
 
-### `npm test`
+### `yarn test`
 
 Launches the test runner in the interactive watch mode.<br />
 See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
 
-### `npm run build`
+### `yarn build`
 
 Builds the app for production to the `build` folder.<br />
 It correctly bundles React in production mode and optimizes the build for the best performance.
@@ -27,7 +27,7 @@ Your app is ready to be deployed!
 
 See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
 
-### `npm run eject`
+### `yarn eject`
 
 **Note: this is a one-way operation. Once you `eject`, you can’t go back!**
 
@@ -63,6 +63,6 @@ This section has moved here: https://facebook.github.io/create-react-app/docs/ad
 
 This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
 
-### `npm run build` fails to minify
+### `yarn build` fails to minify
 
 This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify

package.json

 {
-  "name": "tictactoe",
+  "name": "my-app",
   "version": "0.1.0",
   "private": true,
   "dependencies": {
     "@testing-library/jest-dom": "^4.2.4",
-    "@testing-library/react": "^9.5.0",
-    "@testing-library/user-event": "^7.2.1",
+    "@testing-library/react": "^9.3.2",
+    "@testing-library/user-event": "^7.1.2",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-scripts": "3.4.1"

src/index.css

 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;
-}
+    font: 14px "Century Gothic", Futura, sans-serif;
+    margin: 20px;
+  }
+  
+  ol, ul {
+    padding-left: 30px;
+  }
+  
+  .board-row:after {
+    clear: both;
+    content: "";
+    display: table;
+  }
+  
+  .status {
+    margin-bottom: 10px;
+  }
+  
+  .square {
+    background: #fff;
+    border: 1px solid #999;
+    float: left;
+    font-size: 24px;
+    font-weight: bold;
+    line-height: 34px;
+    height: 34px;
+    margin-right: -1px;
+    margin-top: -1px;
+    padding: 0;
+    text-align: center;
+    width: 34px;
+  }
+  
+  .square:focus {
+    outline: none;
+  }
+  
+  .kbd-navigation .square:focus {
+    background: #ddd;
+  }
+  
+  .game {
+    display: flex;
+    flex-direction: row;
+  }
+  
+  .game-info {
+    margin-left: 20px;
+  }
+  
\ No newline at end of file

src/index.js

-import React from 'react';
-import ReactDOM from 'react-dom';
-import './index.css';
-import App from './App';
-import * as serviceWorker from './serviceWorker';
-
-ReactDOM.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>,
-  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();
+import React from "react";
+import ReactDOM from "react-dom";
+import "./index.css";
+
+function Square(props) {
+    return (
+      <button className="square" onClick={props.onClick}>
+        {props.value}
+      </button>
+    );
+  }
+  
+  class Board extends React.Component {
+    renderSquare(i) {
+      return (
+        <Square
+          value={this.props.squares[i]}
+          onClick={() => this.props.onClick(i)}
+        />
+      );
+    }
+  
+    render() {
+      return (
+        <div>
+          <div className="board-row">
+            {this.renderSquare(0)}
+            {this.renderSquare(1)}
+            {this.renderSquare(2)}
+          </div>
+          <div className="board-row">
+            {this.renderSquare(3)}
+            {this.renderSquare(4)}
+            {this.renderSquare(5)}
+          </div>
+          <div className="board-row">
+            {this.renderSquare(6)}
+            {this.renderSquare(7)}
+            {this.renderSquare(8)}
+          </div>
+        </div>
+      );
+    }
+  }
+  
+  class Game extends React.Component {
+    constructor(props) {
+      super(props);
+      this.state = {
+        history: [
+          {
+            squares: Array(9).fill(null)
+          }
+        ],
+        stepNumber: 0,
+        xIsNext: true
+      };
+    }
+  
+    handleClick(i) {
+      const history = this.state.history.slice(0, this.state.stepNumber + 1);
+      const current = history[history.length - 1];
+      const squares = current.squares.slice();
+      if (calculateWinner(squares) || squares[i]) {
+        return;
+      }
+      squares[i] = this.state.xIsNext ? "X" : "O";
+      this.setState({
+        history: history.concat([
+          {
+            squares: squares
+          }
+        ]),
+        stepNumber: history.length,
+        xIsNext: !this.state.xIsNext
+      });
+    }
+  
+    jumpTo(step) {
+      this.setState({
+        stepNumber: step,
+        xIsNext: (step % 2) === 0
+      });
+    }
+  
+    render() {
+      const history = this.state.history;
+      const current = history[this.state.stepNumber];
+      const winner = calculateWinner(current.squares);
+  
+      const moves = history.map((step, move) => {
+        const desc = move ?
+          'Go to move #' + move :
+          'Go to game start';
+        return (
+          <li key={move}>
+            <button onClick={() => this.jumpTo(move)}>{desc}</button>
+          </li>
+        );
+      });
+  
+      let status;
+      if (winner) {
+        status = "Winner: " + winner;
+      } else {
+        status = "ผู้เล่นคนถัดไป: " + (this.state.xIsNext ? "X" : "O");
+      }
+  
+      return (
+        <div className="game">
+          <div className="game-board">
+            <Board
+              squares={current.squares}
+              onClick={i => this.handleClick(i)}
+            />
+          </div>
+          <div className="game-info">
+            <div>{status}</div>
+            <ol>{moves}</ol>
+          </div>
+        </div>
+      );
+    }
+  }
+  
+  // ========================================
+  
+  ReactDOM.render(<Game />, document.getElementById("root"));
+  
+  function calculateWinner(squares) {
+    const lines = [
+      [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 < lines.length; i++) {
+      const [a, b, c] = lines[i];
+      if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
+        return squares[a];
+      }
+    }
+    return null;
+  }
+  
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