使用XMLHttpRequest解析json

不适用内函数或者promise的方式，可以在外部提取到json数据

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script>
        function createXHR(){
            var xhr = null;
            if(window.XMLHttpRequest){
                xhr = new XMLHttpRequest();
            }else if(window.ActiveXObject){
                xhr = new ActiveXObject("Microsoft.XMLHTTP");
            }
            return xhr;
        }

        function test1(){
            var xhr = createXHR();
            xhr.open('GET','http://localhost/firstphp/js/SiteGPS.js',true);
            xhr.onreadystatechange = function(){
                if(this.readyState == 4){
                   alert(this.responseText);
                }
            }
            xhr.send(null);
        }
    </script>
</head>
<body>
    <input type="button" value="更新歌曲" onclick="test1();">
    <div id="lists"></div>
</body>
</html>

 

posted @ 2017-04-17 15:27  JarvisLau  阅读(4275)  评论(0)  编辑  收藏  举报