为扁平列表中的每个项目添加两个按钮

<ul id="item-list">
  <li>项目1</li>
  <li>项目2</li>
  <li>项目3</li>
  ...
</ul>

var itemList = document.getElementById("item-list");
var items = itemList.getElementsByTagName("li");

for (var i = 0; i < items.length; i++) {
  var button1 = document.createElement("button");
  button1.innerHTML = "按钮1";
  items[i].appendChild(button1);

  var button2 = document.createElement("button");
  button2.innerHTML = "按钮2";
  items[i].appendChild(button2);
}

for (var i = 0; i < items.length; i++) {
  var button1 = document.createElement("button");
  button1.innerHTML = "按钮1";
  items[i].appendChild(button1);
  button1.addEventListener("click", function() {
    // 处理按钮1的点击事件
    console.log("按钮1被点击");
  });

  var button2 = document.createElement("button");
  button2.innerHTML = "按钮2";
  items[i].appendChild(button2);
  button2.addEventListener("click", function() {
    // 处理按钮2的点击事件
    console.log("按钮2被点击");
  });
}