为什么我的变量在 forEach() 中不可访问？ [复制]

Question

我试图了解为什么我无法从底部的 forEach() 函数内部访问变量 i。有人可以帮帮我吗？

draw() {
    this.players.forEach( (player, i) => {
      let cardElements = [];

      player.cards.forEach( (card) => {
        let cardElement = document.createElement("div")
        cardElement.classList.add("card")
        cardElement.setAttribute("suit", card.suit)

        let cardValue = document.createElement("div")
        cardValue.classList.add("value")
        cardValue.textContent = card.value

        cardElement.append(cardValue)

        cardElements.push( cardElement )

      });

      cardElements.forEach( (cardElement) => {
        document.getElementById(`player-${i}`).append(cardElement)
      });

    })
  }

Answer 1

字符串轮询适用于${i} 而不是$i

document.getElementById(`player-${i}`).append(cardElement)