gistfile1.txt

manifest:

{
  "name": "Where am I?",
  "description": "A simple web app",
  "launch_path": "/index.html",
  "icons": {
    "128": "/style/icons/earth.png"
  },
  "permissions": {
    "geolocation": {
      "description": "something important?"
      }
  }
}


code:

var whereami = document.getElementById('where-am-i');
var whereiam = document.getElementById('where-i-am');

whereami.onclick = function() {
  navigator.geolocation.getCurrentPosition(success, error);
};

function success(position) {
  whereiam.innerHTML = position.coords.latitude + ", " + position.coords.longitude;
}

function error(error) {
  console.log(error.code + " : " + error.message);
}