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AustinZhu/index.html

Created June 17, 2022 16:48
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Tic Tac Toe
Raw
index.html
<div id="errors" style="
background: #c00;
color: #fff;
display: none;
margin: -20px -20px 20px;
padding: 20px;
white-space: pre-wrap;
"></div>
<div id="root"></div>
<script>
window.addEventListener('mousedown', function(e) {
document.body.classList.add('mouse-navigation');
document.body.classList.remove('kbd-navigation');
});
window.addEventListener('keydown', function(e) {
if (e.keyCode === 9) {
document.body.classList.add('kbd-navigation');
document.body.classList.remove('mouse-navigation');
}
});
window.addEventListener('click', function(e) {
if (e.target.tagName === 'A' && e.target.getAttribute('href') === '#') {
e.preventDefault();
}
});
window.onerror = function(message, source, line, col, error) {
var text = error ? error.stack || error : message + ' (at ' + source + ':' + line + ':' + col + ')';
errors.textContent += text + '\n';
errors.style.display = '';
};
console.error = (function(old) {
return function error() {
errors.textContent += Array.prototype.slice.call(arguments).join(' ') + '\n';
errors.style.display = '';
old.apply(this, arguments);
}
})(console.error);
</script>
Raw
script.babel
function Square (props) {
return (
<button
className="square"
onClick={props.onClick}>
{props.value}
</button>
);
}
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;
}
class Board extends React.Component {
renderSquare(i) {
return <Square value={this.props.squares[i]} onClick={() => this.props.onClick(i)}/>;
}
render() {
return (
<div>
<div className="status">{status}</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>
);
}
}
const getBoard = (history, i) => {
squares = Array(9).fill(null);
for (let j = 0; j < i; j++) {
squares[history[j]] = (j % 2 === 0) ? 'X' : 'O';
}
return squares;
};
class Game extends React.Component {
constructor(props){
super(props);
this.history = [];
this.state = {
currentStep: 0,
};
}
handleClick(i) {
const history = this.history;
const squares = getBoard(history, i);
if (calculateWinner(squares) || squares[i]) {
this.setState({currentStep: history.length});
return;
}
squares[i] = (history.length % 2 === 0) ? 'X' : 'O';
this.history.push(i);
this.setState({currentStep: this.history.length});
}
jumpTo(i) {
this.setState({currentStep: i});
}
render() {
const latestMove = this.history.length - 1;
const boardAtMove = getBoard(this.history, this.state.currentStep);
const winner = calculateWinner(getBoard(this.history, latestMove));
const moves = this.history.map((position, move) => {
const desc = move ? `Go to move #${move} (${position % 3}, ${Math.floor(position/3)})` : 'Go to game start';
const text = this.state.currentStep === move ? <b>{desc}</b> : desc;
return (
<li key={move}>
<button onClick={() => this.jumpTo(move)}>
{text}
</button>
</li>
);
});
let status;
if (winner) {
status = `Winner: ${winner}`;
} else {
if (this.history.length === 9) {
status = "It's a draw";
} else {
status = `Next player: ${((latestMove + 1) % 2 === 0) ? 'X' : 'O'}`;
}
}
return (
<div className="game">
<div className="game-board">
<Board
squares={boardAtMove}
onClick={(i) => this.handleClick(i)}
/>
</div>
<div className="game-info">
<div>{status}</div>
<ol>{moves}</ol>
</div>
</div>
);
}
}
// ========================================
const root = ReactDOM.createRoot(document.getElementById("root"));
root.render(<Game />);
Raw
scripts
<script src="https://unpkg.com/react/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom/umd/react-dom.development.js"></script>
Raw
style.css
body {
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;
}
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