前言
=> 是ES6中的arrow function
x=>x+6
就相当于
function(x){
return x+6;
}
正文
XMLHttpRequest
a=new XMLHttpRequest();
a.open("POST",url,true);
a.send("username=aaa");
a.onreadystatechange=function(){
if(a.readystate==4&&a.status==200){
alert(a.responseText);
}
}
fetch
fetch(url,{
method:"POST",
headers:{"Content-Type:application/x-www-form-urlencoded"},
body:"username=aaa"
}).then(function(res){
return res.text();
}).then(function(data){
alert(data);
})
或
fetch(url,{
method:"POST",
headers:{"Content-Type:application/x-www-form-urlencoded"},
body:"username=aaa"
}).then(res=>res.text()).then(data=>alert(data))
上面两种是相同的
jQuery
$.post(url,{"username":"aaa"},function(text){
alert(text);
})
$.ajax({
type:"POST",
url:url,
data:"username=aaa",
success:function(text){
alert(text);
}
})