study
/
js
/
7th.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>JSON/AJAX</title>
    <script>
        /*
        JSON对象中，必须给 属性 添加 双引号
        */
        /*
            AJAX
            XMLHttpRequest  XHR
            ActiveXObject   IE5/6
            1.创建XHR对象
            2.连接服务器
            3.发送请求
        */

        var xhr;
        if(window.XMLHttpRequest){
            xhr = new XMLHttpRequest();
        }else{
            xhr = new ActiveXObject("Microsoft,XMLHTTP");
        };
        xhr.open('get','/xxx/url',true);
        //xhr.send();
        xhr.send(JSON.stringify({"name":"hanley"}));//post 数据
        xhr.onreadystatechange = function(){
            if(xhr.readyState == 4 && xhr.status == 200){
                console.log(xhr.responseText)//响应数据
            }
        }

        //一般情况 使用 jQuery Ajax


    </script>
</head>
<body>

</body>
</html>