spoof location/GPS with the geolocation API

spoof_location.js

/*
* Run this in your console with the desired latitude and longitude values just before the page requests location / after the page loads..
*
* getCurrentPosition takes a callback function which is normally called when the user gives persmission to access location.
* Here we shim the function with our own implementation which resolves after sometime with the fake coordinate data.
*
* we're no-op'ing the watchPosition function because websites can use this to track changes in the location which can be used
* to detect the last position.
*/
navigator.geolocation.getCurrentPosition = (fn) => {
  setTimeout(() => {
    fn({
      coords: {
        accuracy: 40,
        altitude: null,
        altitudeAccuracy: null,
        heading: null,
        latitude: 12.9716,
        longitude: 77.5946,
        speed: null,
      },
      timestamp: Date.now(),
    })
    navigator.geolocation.watchPosition = () => {}
  }, 2912)
}