Test if html5 geolocation permission already has been granted

Question

Does anyone know if there is a way to test if prior html5 geolocation permission has been granted?

I try to make a script that does not request the geolocation unles

Answer 1

Best you can do is to keep track of this yourself...

// In chrome you can now do this    
navigator.permissions.query({name: 'geolocation'}).then(function(PermissionStatus){
    console.log(PermissionStatus.state) // prompt, granted, denied
    // even listen for changes
    PermissionStatus.onchange = function(){
        console.log(this.state)
    }
})

fallback method:

// initialization
if( sessionStorage.getItem("geo_access") === null ){
    // just assume it is prompt
    sessionStorage.setItem("geo_access", "prompt");
}

function ask(){
    navigator.geolocation.getCurrentPosition(function(){
        sessionStorage.setItem("geo_access", "granted");

    }, function(err){
        if(err.code == 1){ // PERMISSION_DENIED
            sessionStorage.setItem("geo_access", "denied");
        }
        sessionStorage.setItem("geo_access", "prompt");
    });
};

// Then somewhere
ask();