ajax-Xhr

<!DOCTYPE html>

<html lang="en">

  <head>

    <meta charset="UTF-8" />

    <meta http-equiv="X-UA-Compatible" content="IE=edge" />

    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <title>Document</title>

  </head>

  <body>

    <script src="/jQuery三天学习/jquery-3.5.1/jquery-3.5.1/jquery-3.5.1.js"></script>

    <script>

      //1.创建 XHR 对象

      var xhr = new XMLHttpRequest();

      //2.调用open 函数

      xhr.open("GET", "http://localhost:8080/select");

xhr.setRequestHeader(
"Content-Type",
"application/x-www-form-urlencoded"
);

//3.调用send 函数

      xhr.send(·参数·);


      //4.监听 onreadystatechage事件

      xhr.opreadystatechage = function () {

        if (xhr.readyState === 4 && xhr.status === 200) {

          console.log(xhr.responseText);

        }

      };

    </script>

  </body>

</html>

巴特西

ajax-Xhr

最新文章

热门文章