将隐藏的值从html安全地传递到ajax

<form id="myForm">
  <input type="hidden" id="hiddenValue" value="your_hidden_value">
  <button type="button" onclick="sendAjaxRequest()">发送请求</button>
</form>

function sendAjaxRequest() {
  var hiddenValue = document.getElementById("hiddenValue").value;
  
  // 创建Ajax请求对象
  var xhr = new XMLHttpRequest();
  
  // 配置请求
  xhr.open("POST", "your_server_url", true);
  xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  
  // 发送请求
  xhr.send("hiddenValue=" + encodeURIComponent(hiddenValue));
  
  // 处理响应
  xhr.onreadystatechange = function() {
    if (xhr.readyState === XMLHttpRequest.DONE) {
      if (xhr.status === 200) {
        // 处理成功响应
        console.log(xhr.responseText);
      } else {
        // 处理错误响应
        console.error(xhr.status);
      }
    }
  }
}