Область видимости при отправке данных через XMLHttpRequest

let xhttp = new XMLHttpRequest();
    xhttp.open("post", "getRequest2.php", true);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    
 
 
    let div = document.querySelector('#div');
    let name = document.querySelector('.name');
    let lname = document.querySelector('.lname');
    let tap = document.querySelector('.tap');
 
tap.onclick = function(){
    xhttp.send('name=' + name.value + '&' + 'LastName=' + lname.value);
}
xhttp.onreadystatechange = function(){
    if(this.readyState == 4 && this.status == 200){
        div.innerHTML = xhttp.responseText;
        console.log(this);
    }
}

    let xhttp2 = new XMLHttpRequest();
    xhttp2.open("post", "getRequest2.php", true);
    xhttp2.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 
let like = document.querySelector('.like');
let divlike = document.querySelector('.divlike');
 
like.onclick = function(){
    var lois = localStorage.setItem('liker',1);
    
    xhttp2.send('lois=' + localStorage.getItem('liker'));
    divlike.innerHTML = localStorage.getItem('liker');
}
xhttp2.onreadystatechange = function(){
    if(this.readyState == 4 && this.status == 200){
        div.innerHTML = xhttp2.responseText;
        console.log(this);
    }
}