JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="getLocation()">Try It</button>

JavaScript

function getLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(showPosition);
  } else {
    console.log('Geolocation is not supported by this browser.');
  }
}

function showPosition(position) {
  console.log(position.coords);
  alert(position.coords.latitude);
  alert(position.coords.longitude);
}