实例
<!DOCTYPE html>
<html lang="zh">
<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>Document</title>
</head>
<body>
</body>
<script type="text/javascript">
//1.创建请求
var ajax = new XMLHttpRequest();
//2.建立连接
ajax.open('get','./ajax.php',true);
//3.发送请求
ajax.send();
//4.准备一个事件处理回来的内容
ajax.onreadystatechange = function(){
if(ajax.readyState == 4 && ajax.status ==200){
var result = ajax.responseText;
alert(result);
}
}
</script>
</html>运行实例 »
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