how to use method get in ajax jquery code example

Example 1: jquery ajax get

$.ajax({
    	url: "www.site.com/page",
    	success: function(data){ 
    	    $('#data').text(data);
    	},
    	error: function(){
    		alert("There was an error.");
    	}
    });

Example 2: ajax get js

let xhr = new XMLHttpRequest();

xhr.open("GET", "une/url");

xhr.responseType = "json";

xhr.send();

xhr.onload = function(){
    if (xhr.status != 200){ 
        alert("Erreur " + xhr.status + " : " + xhr.statusText);
    }else{ 
        alert(xhr.response.length + " octets  téléchargés\n" + JSON.stringify(xhr.response));
    }
};

xhr.onerror = function(){
    alert("La requête a échoué");
};

xhr.onprogress = function(event){
    if (event.lengthComputable){
        alert(event.loaded + " octets reçus sur un total de " + event.total);
    }
};