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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script> <!-- 객체 -->
<script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script> <!-- 객체 -->
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
class App extends React.Component{
render(){
return(
<div>
</div>
)
}
}
ReactDOM.render(
<App />,
document.querySelector('#root')
)
</script>
</body>
</html>
코드
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script> <!-- 객체 -->
<script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script> <!-- 객체 -->
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
</head>
<style>
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;
}
</style>
<body>
<div id="root"></div>
<script type="text/babel">
const calcuateWinner = (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++){
let a2 = lines[i][0]
let b2 = lines[i][1]
let c2 = lines[i][2]
const [a,b,c] = lines[i] // [0,1,2]
// console.log(a,b,c)
console.log("이거임",squares[a],squares[b],squares[c], squares[a] === squares[b], squares[a] === squares[c])
if(squares[a] != null && squares[a] === squares[b] && squares[a] === squares[c]){
return squares[a]
}
}
return null
}
class Square extends React.Component{
render(){
return(
<button className="square"
onClick = {this.props.onClick}
>
{this.props.value}
</button>
)
}
}
class Board extends React.Component{
state = {
squares:Array(9).fill(null),
xIsNext:true
}
handleClick = i => {
console.log(i)
const squares = [...this.state.squares]
console.log("선택" ,squares[i])
// calcuateWinner(squares) //8개 경우의 수 다 나옴
// console.log('이거눠지', squares[i] !== null, calcuateWinner(squares) != null)
if(squares[i] !== null || calcuateWinner(squares) != null){
return
}
// console.log(this.state.xIsNext) // true
const xIsNext = this.state.xIsNext
// let flag = 'X'
// if(xIsNext) {
// flag = 'X'
// } else{
// flag = "O"
// }
// squares[i] = flag
//줄이면? 아래코드 한줄 삼항연산자
squares[i] = xIsNext ? "X" : "O"
this.setState({
...this.state,
squares,
xIsNext:!xIsNext // 상태 변경 true -> false
})
// 처음 눌렀을 땐 X
// 두번 눌렀을 땐 O
// 세번 눌렀을 땐 X
// 네번 눌렀을 땐 O
}
renderSquare = (i) => {
return (
<Square
value={this.state.squares[i]} //[null, null............]
onClick = {()=>{ this.handleClick(i) }}
/>
)
}
//X 넣어보니까 전부 다 X가 됨 null 넣으니까 전부 다 안보임.
// 클릭했을 때, X가 나오게 하고 싶음.
// 클릭했을 때, 해당 인자값에 있는 숫자가 콘솔에 찍히게.
//내가 만약에 i번을 클릭했을 때 i번에 해당되는 내용을 null-> 'X'로 바꾸는 거야.
// [null,null,null,null......]
render(){
const {renderSquare, state:{squares}} = this
const winner = calcuateWinner(squares) // null, "O", "X"
if(winner != null){
console.log('승자가 있다.')
console.log(winner)
} else{
console.log('승자가 없다.')
if(this.state.xIsNext == true){
console.log('X')
} else{
console.log('O')
}
}
const status = winner != null ? `Winner: ${winner} `: `Next Player ${this.state.xIsNext ? 'X' : 'O'}`
return(
<div>
<div className="status">{status}</div>
<div className="board-row">
{renderSquare(0)}
{renderSquare(1)}
{renderSquare(2)}
</div>
<div className="board-row">
{renderSquare(3)}
{renderSquare(4)}
{renderSquare(5)}
</div>
<div className="board-row">
{renderSquare(6)}
{renderSquare(7)}
{renderSquare(8)}
</div>
</div>
)
}
}
class Game extends React.Component{
render(){
return(
<div className="game">
<div className="gme-board">
<Board/>
</div>
<div className="game-info">
</div>
</div>
)
}
}
ReactDOM.render(
<Game />,
document.querySelector('#root')
)
</script>
</body>
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