JSFiddle - React, Tailwind, and code Playground

JavaScript

document.addEventListener("DOMContentLoaded", function() {
    var now = new Date();
    console.log(window.performance.timing.domContentLoadedEventStart-now);
}, false);


$(document).ready(function() {
    var now = new Date();
    console.log(window.performance.timing.domContentLoadedEventStart-now);

});