代码中的所有注解：

// Copied from your code, the winning combinations
const markersToHit = [
  [0, 1, 2],
  [3, 4, 5],
  [6, 7, 8],
  [0, 3, 6],
  [1, 4, 7],
  [2, 5, 8],
  [0, 4, 8],
  [2, 4, 6],
];

// Call this function with an array holding the player's current choices
function isItAWinner(choices) {
  let winner = false;
  // Loop through all winning combinations
  markersToHit.forEach(winningCombination => {
  
    // If a winning combination has already been found, skip
    if(winner) return;
    
    // matchers contains the intersection of the player's choices and the current winning combination
    let matches = winningCombination.filter(singleMarker => {
      return choices.includes(singleMarker)
    });
    
    // If all three necessary choices of this winning combination are matched, this player wins
    if (matches.length === 3) {
      console.log("Winning combination: " + matches);
      winner = true;
    }
  });
  return winner;
}

// An example: player's choices (spoiler: they win)
const playersChoices = [0, 3, 8, 6];
console.log(isItAWinner(playersChoices));

const checkWinAndTie = () => {
    const winCheck = () => {
      const markersToHit = [
        [0, 1, 2],
        [3, 4, 5],
        [6, 7, 8],
        [0, 3, 6],
        [1, 4, 7],
        [2, 5, 8],
        [0, 4, 8],
        [2, 4, 6],
      ]

      //I want to check if the activePlayer PlayerHits(which holds an array), matches
      //with any of the values inside markersToHit
      //if they match, I want to  display the activePlayer has won the round and add a score to them

      for (let i = 0; i < markersToHit.length; i++) {
        console.log(markersToHit[i]);
-       if (markersToHit[i] === getActivePlayer().playerHits) {
+       if (getActivePlayer().playerHits.every((val, j) => val === markersToHit[i][j]))
          console.log(`${getActivePlayer().name} wins!`);
        }
      }
      console.log(`${getActivePlayer().name} :${getActivePlayer().playerHits}`);
    }

    winCheck();
  }

您正在检查这两个数组是否是同一个对象，但您希望检查数组的元素是否包含在播放器的值中。

for (let i = 0; i < markersToHit.length; i++) {
        const hasRow = markersToHit[i].every(f => getActivePlayer().playerHits.includes(""+f));
        if (hasRow) {
          console.log(`${getActivePlayer().name} wins!`);
        }
      }

请注意，player数组和marks数组中的值属于不同的类型（string与int），因此您必须修改其中一个，或者与==而不是===进行比较。