用普通的JavaScript写出一个Like按钮特性

<button id="likeButton" onclick="toggleLike()">Like</button>
<span id="likeCount">0</span> Likes

var isLiked = false;
var likeCount = 0;

function toggleLike() {
  if (isLiked) {
    unlike();
  } else {
    like();
  }
}

function like() {
  isLiked = true;
  likeCount++;
  updateLikeButton();
  updateLikeCount();
}

function unlike() {
  isLiked = false;
  likeCount--;
  updateLikeButton();
  updateLikeCount();
}

function updateLikeButton() {
  var likeButton = document.getElementById("likeButton");
  if (isLiked) {
    likeButton.innerHTML = "Unlike";
  } else {
    likeButton.innerHTML = "Like";
  }
}

function updateLikeCount() {
  var likeCountElement = document.getElementById("likeCount");
  likeCountElement.innerHTML = likeCount;
}