//获取元素对象 const result = document.getElementById("result"); //绑定事件 result.addEventListener("mouseover", function(){ //1. 创建对象 const xhr = new XMLHttpRequest(); //2. 初始化 设置类型与 URL xhr.open(\'POST\', \'http://127.0.0.1:8000/server\'); //设置请求头 xhr.setRequestHeader(\'Content-Type\',\'application/x-www-form-urlencoded\'); xhr.setRequestHeader(\'name\',\'atguigu\'); //3. 设置POST的请求体 xhr.send(\'a=100&b=200&c=300\'); // xhr.send(\'a:100&b:200&c:300\'); // xhr.send(\'1233211234567\'); //4. 事件绑定 xhr.onreadystatechange = function(){ //判断 if(xhr.readyState === 4){ if(xhr.status >= 200 && xhr.status < 300){ //处理服务端返回的结果 result.innerHTML = xhr.response; } } } });