Add className dynamically

How to add className dynamically from a class as a parent and function as a child in ReactJS?

I want to add different className to all the winning boxes in my tic tac toe game. I am a newbie to React and so can't figure out how to do it.

Here's codepen link to my code:
https://codepen.io/khushikothari/pen/vYgmoNa

Also here is the js code:

function Square(props) {
const className = "square" + (props.highlight ? "highlight" : "");
return (

{props.value}

);
}

class Board extends React.Component {
renderSquare(i) {
return (
value={this.props.squares[i]}
onClick={() => this.props.onClick(i)}
highlight = {false}
/>
);
}

render() {
return (

{this.renderSquare(0)}
{this.renderSquare(1)}
{this.renderSquare(2)}


{this.renderSquare(3)}
{this.renderSquare(4)}
{this.renderSquare(5)}


{this.renderSquare(6)}
{this.renderSquare(7)}
{this.renderSquare(8)}


);
}
}

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;
    const current = history[history.length -1];
    const squares_cpy = current.squares.slice();
    let arr = calculateWinner(squares_cpy);
    if (arr[1] || squares_cpy[i]) {
      return;
    }
    squares_cpy[i] = this.state.xIsNext ? 'X' : 'O';
    this.setState({
      history: history.concat([{
        squares: squares_cpy
      }]),
      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];
    let arr = 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 (arr[1]) {
      status = 'Winner: ' + arr[1];

      }
    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(
,
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 [lines[i], squares[a]];
}

}
return [null, null];
}