JSFiddle - React, Tailwind, and code Playground

JavaScript

var isSafari = navigator.vendor && navigator.vendor.indexOf('Apple') > -1 &&
                   navigator.userAgent && !navigator.userAgent.match('CriOS');

    var el = document.createElement("p");
    el.innerText = "Is it Safari: " + isSafari;

    document.body.appendChild(el);

    el = document.createElement("p");
    el.innerText = "navigator.vendor: " + navigator.vendor;

    document.body.appendChild(el);

    el = document.createElement("p");
    el.innerText = "navigator.userAgent: " + navigator.userAgent;

    document.body.appendChild(el);