memo

// 取得所有的tr元素
var rows = document.querySelectorAll("table tr");

// 創建三個按鈕的模板
function createButton(iconClass, buttonText, clickHandler) {
  var button = document.createElement("button");
  var icon = document.createElement("i");
  icon.className = iconClass;
  button.appendChild(icon);
  button.appendChild(document.createTextNode(buttonText));
  button.onclick = clickHandler;
  return button;
}

// 為每個tr元素創建下拉選單和按鈕
for (var i = 0; i < rows.length; i++) {
  var row = rows[i];

  // 創建下拉選單元素
  var dropdown = document.createElement("select");
  dropdown.className = "dropdown";

  // 創建第一個選項
  var firstOption = document.createElement("option");
  var icon = document.createElement("i");
  icon.className = "fas fa-ellipsis-v";
  firstOption.appendChild(icon);
  dropdown.add(firstOption);

  // 創建編輯按鈕
  var editButton = createButton("fas fa-edit", "編輯", function() {
    var target = this.getAttribute("data-target");
    window.location.href = target;
  });

  // 創建複製按鈕
  var cloneButton = createButton("fas fa-copy", "複製", function() {
    // 複製當前的tr元素
    var clonedRow = row.cloneNode(true);
    row.parentNode.insertBefore(clonedRow, row.nextSibling);
  });

  // 創建刪除按鈕
  var deleteButton = createButton("fas fa-trash-alt", "刪除", function() {
    // 刪除當前的tr元素
    row.parentNode.removeChild(row);
  });

  // 將下拉選單和按鈕添加到tr元素的第一個單元格中
  var firstCell = row.cells[0];
  firstCell.insertBefore(dropdown, firstCell.firstChild);
  firstCell.appendChild(editButton);
  firstCell.appendChild(cloneButton);
  firstCell.appendChild(deleteButton);

  // 設定編輯按鈕的data-target屬性為指定的URL
  var target = "http://example.com/edit/" + i;
  editButton.setAttribute("data-target", target);

  // 當選擇一個選項時，執行相應的操作
  dropdown.onchange = function() {
    var selectedOption = this.options[this.selectedIndex];
    var selectedValue = selectedOption.value;

    if (selectedValue == "edit") {
      editButton.click();
    } else if (selectedValue == "clone") {
      cloneButton.click();
    } else if (selectedValue == "delete") {
      deleteButton.click();
    }
  };
}