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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript Geolocation API</h1>
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<p>单击按钮以获取您的坐标。</p>
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<button onclick="getLocation()">试一试</button>
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<p id="demo"></p>
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<script>
const x = document.getElementById("demo");
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function getLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.watchPosition(showPosition);
  } else { 
    x.innerHTML = "Geolocation is not supported by this browser.";
  }
}
    
function showPosition(position) {
    x.innerHTML="Latitude: " + position.coords.latitude + 
    "<br>Longitude: " + position.coords.longitude;
}
</script>
​
</body>
</html>
​