check if location setting has been turned off in users browser

问题

I would like to hide() or show() a button that allows users to use their current location based on whether or not they are currently allowing location to be used in their browser setting. the below code only checks if the browser supports geolocation and not whether or not the particular user is allowing it.

if (navigator.geolocation)  {
   navigator.geolocation.getCurrentPosition(showPosition);
   } else  {
 x.innerHTML="Geolocation is not supported by this browser.";}
 }

Is there a boolean value that I can detect for their browser setting letting me know if location is currently allowed?

thanks for any suggestions.

回答1:

Have you read http://www.w3schools.com/html/html5_geolocation.asp

What you want to do is check the errors to see if they allowed it or denied the request.

function getLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(showPosition,showError);
  } else {
    x.innerHTML = "Geolocation is not supported by this browser.";
  }
}

function showPosition(position) {
  x.innerHTML = "Latitude: " + position.coords.latitude + "<br>Longitude: " + position.coords.longitude;    
}

function showError(error) {
  switch(error.code) {
    case error.PERMISSION_DENIED:
      x.innerHTML = "User denied the request for Geolocation."
      break;
    case error.POSITION_UNAVAILABLE:
      x.innerHTML = "Location information is unavailable."
      break;
    case error.TIMEOUT:
      x.innerHTML = "The request to get user location timed out."
      break;
    case error.UNKNOWN_ERROR:
      x.innerHTML = "An unknown error occurred."
      break;
  }
}

回答2:

The below code will allow you to check the permission status without invoking the navigator.geolocation permission request on Chrome 43+ and Firefox 46+.

navigator.permissions && navigator.permissions.query({name: 'geolocation'}).then(function(PermissionStatus) {
    if(PermissionStatus.state == 'granted'){
          //allowed
    }else{
         //denied
    }
})

Here is the Reference Link.

Compatibility on other browsers is unknown. I haven't tested it myself but please feel to test yourself and comment below.

来源：https://stackoverflow.com/questions/14862019/check-if-location-setting-has-been-turned-off-in-users-browser

标签

javascript

jquery

browser

geolocation