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@Bk201Freelance
Forked from thiskevinwang/Tic-Tac-Toe-2.jsx
Last active September 3, 2019 18:25
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Solution to Task #2
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 locations = [
[1, 1],
[2, 1],
[3, 1],
[1, 2],
[2, 2],
[3, 2],
[1, 3],
[2, 3],
[3, 3]
];
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,
location: locations[i]
}
]),
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 descriptionFull = move ? "Go to move #" : "Go to game start";
if (move) {
return (
<li key={move}>
<button onClick={() => this.jumpTo(move)}>
{descriptionFull}
<strong>
{move]
</strong>
</button>
</li>
);
} else {
return (
<li key={move}>
<button onClick={() => this.jumpTo(move)}>
{descriptionFull}
</button>
</li>
);
}
});
let status;
if (winner) {
status = "Winner: " + winner;
} else {
status = "Next player: " + (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;
}
@Bk201Freelance
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Author

Hello, I change a little bit the code because by " Bold the currently selected item in the move list."

I understand to only bold the number.

Anyway, your code seems to be good but I did not look at the other solutions because I want to do it myself.

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