【javascript】Javascript发起一个get请求

2023-12-28
点击按钮发起请求

  <script>
            window.onload = function(){
                var oBtn = document.getElementById("btn1");
                oBtn.onclick = function(){
                    //1、创建ajax对象
                    var xhr = null;
                    try{
                        xhr = new XMLHttpRequest();
                    }catch(error){
                        xhr = new ActiveXObject("Microsoft.XMLHTTP");
                    }
                    //2、调用open
                    xhr.open("get", "1.get.php?username=yyy&age=19&password=123abc", true);
                    //3、调用send
                    xhr.send();
                    //4、等待数据响应
                    xhr.onreadystatechange = function(){
                        if(xhr.readyState == 4){
                            //判断本次下载的状态码都是多少
                            if(xhr.status == 200){
                                alert(xhr.responseText);
                            }else{
                                alert("Error:" + xhr.status);
                            }
                        }
                    }
                }
            }
        </script>

<body>
     <button id = 'btn1'>GET请求</button>
</body>
#Javascript