JSFiddle - React, Tailwind, and code Playground

HTML

<div id='disp'>status appears here</div>

JavaScript

function getStatus(url) {
        var request = new XMLHttpRequest();
    request.onreadystatechange = function() {
        if (request.readyState === 4){
            request.status;//this contains the status code
            setHtml('disp', request.status);
        }
    };
        request.open("GET", url, true);
        request.send(); 
} 

    
function setHtml(targetC, htmldata) {
    console.log(htmldata);
    var theDiv = document.getElementById(targetC);
    theDiv.innerHTML = htmldata;
}

getStatus( '/json');