How can we send a HTTP request synchronously?

Question

If I am correct, "A" in "AJAX" means sending a HTTP request asynchronously without waiting for a HTTP response.

I learn that we can send an asynchronous HTTP request by XMLHttpRequest , for example:

function handleButtonPress(e) { 
    var httpRequest = new XMLHttpRequest(); 
    httpRequest.onreadystatechange = handleResponse; 
    httpRequest.open("GET", e.target.innerHTML +  ".html"); 
    httpRequest.send(); 
} 

How can we send a HTTP request synchronously?

Answer 1

The third param in open function is for async request sending. You can set it to false for a synchronous request

function handleButtonPress(e) { 
    var httpRequest = new XMLHttpRequest(); 
    httpRequest.onreadystatechange = handleResponse; 
    httpRequest.open("GET", e.target.innerHTML +  ".html", false); 
    httpRequest.send(); 
}