JavaScript Using GET and no parameters

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Example

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
    if (xhttp.readyState === XMLHttpRequest.DONE && xhttp.status === 200) {
        //parse the response in xhttp.responseText;
    }
};
xhttp.open("GET", "ajax_info.txt", true);
xhttp.send();
6

The fetch API is a newer promise-based way to make asynchronous HTTP requests.

fetch('/').then(response => response.text()).then(text => {
  console.log("The home page is " + text.length + " characters long.");
});
Using GET with parameters