JSFiddle - React, Tailwind, and code Playground

HTML

<div>test</div>

JavaScript

var flag = false;
var elem = document.getElementsByTagName("div")[0];

function foo() {
    flag = true;
    elem.offsetWidth;
    flag = false;
}

window.addEventListener("resize", function() {
    if (flag)
        console.log("Resize event called before foo() returned.");
    
    setTimeout(foo, 0);
}, false);