Get Timezone JavaScript

gettimezone.js

(() => {
  const libs = [
    'https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.6/jstz.min.js'
  ].map((src) => {
    return new Promise(resolve => {
      const script = document.createElement("script"); script.src = src; script.async = false;
      script.onload = () => {
        resolve();
      };
      document.head.appendChild(script);
    });    
  });
  return Promise.all(libs).then(() => {
    console.info(jstz.determine().name())
  });
})();