let xhr;
if(XMLHttpRequest){
xhr = new XMLHttpRequest;
}else{
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
let dataStr = jsonToString (data); // data transmission in JSON format need to be converted into a format string to be written in js code.
// When the server initiates a request, the request includes get and post are two kinds of data that can be passed to the server
// GET request: after the data transfer is with the url of the open Remedies ⾯.
if(type.toUppercase()==''GET'){
xhr.open(type,url+"?"+dataStr, async);
xhr.send();
}else{
// the POST request: the data transfer parameters on the send Remedies.
xhr.open(type , url , async );
xhr.send(dataStr); //等于xhr.send("name='zs'&age='18'");
}
xhr.onreadystatechange = function(){
Whether //log(xhr.readyState);// test status output
if(xhr.readyState ==4 && ((xhr.sttus>=200 xhr.sttus<300) || xhr.status==304)){
let data=xhr.responseText;
success (data); // success callback
}
}
function jsonToString(obj){
let arr=[ ];
for(const key in obj){
const value=obj[key];
arr.push(`${key},${value}`);
}
return arr.join("&");
}
ajax({
type:"GET";
url:“https://getman.cn/mock/,,,”,
data:{name:"zs", age:18},
sucess(data){ console.log("daying "，data)}
});
