正在尝试添加返回功能。(上一步)使用Javascript将按钮添加到我的多步表单

<button id="nextButton">下一步</button>

var nextButton = document.getElementById("nextButton");

nextButton.addEventListener("click", function() {
  // 在这里执行您的操作
  // 验证表单数据、切换步骤等
});

nextButton.addEventListener("click", function() {
  var currentStep = document.getElementById("step1");
  var nextStep = document.getElementById("step2");

  // 验证表单数据，如果验证通过，则切换到下一步
  if (validateFormData(currentStep)) {
    currentStep.style.display = "none";
    nextStep.style.display = "block";
  }
});

<button id="previousButton">上一步</button>

var previousButton = document.getElementById("previousButton");

previousButton.addEventListener("click", function() {
  var currentStep = document.getElementById("step2");
  var previousStep = document.getElementById("step1");

  previousStep.style.display = "block";
  currentStep.style.display = "none";
});