How to get JSON using XMLHttpRequest in JS from this site openweathermap.org?

Question

JavaScript

Good evening. What is the correct way to get Json using XMLHttpRequest? I write like this and in the end nothing works. What is wrong and how correctly tell me?

var myData = new XMLHttpRequest();
myData.open("GET", "api.openweathermap.org/data/2.5/weather?q=London,uk&APPID=KEY", true);
myData.send();
if(myData.status != 200) {
  alert(myData.status + " " + myData.statusText);
} else {
  alert(myData.responseText);  
};

Answer 1

Option 2 common origin policy
: 1. Use JSONP
2. Make a request to the server

Answer 2

1. The request happens asynchronously, your if in the fourth line is triggered much earlier than the request reaches the server. You need to write an onload handler, you can see an example of using XMLHttpRequest https://developer.mozilla.org/ru/docs/Web/API/XMLH...
2. The address is wrong, try instead

api.openweathermap.org/data/2.5/weather?q=London,uk&APPID=KEY

write

//api.openweathermap.org/data/2.5/weather?q=London,uk&APPID=KEY

and of course substitute your key forKEY