Bug 275268 – Geolocation permission state is not immediately reflected in the response of the permissions API, only after a page reload.

• Status: NEW
• Component: WebKit Misc.

I experimented with the permissions API WebKit implementation for geolocation on iOS and MacOS using [this testing site](https://permission.site/permission-status). I'm in particular interested in the behavior for “remembered” granted states. So I tried the following steps in MacOS:

1. Enable Location Services in settings
2. Enable Location Services for Safari in settings
3. Get a geolocation prompt 
4. Tick the [Remember my decision for one day] checkbox
5. Click [Allow]

Expected behavior

1. `navigator.geolocation.getCurrentPosition(...)`, i.e. "Access Status" reports `SUCCESS`
2. `navigator.permissions.query({ name: 'geolocation' })`, i.e. "Permission Status" reports `GRANTED`
3. When I reload the page, the permission status now reports `GRANTED`

Observed behavior:

1. `navigator.geolocation.getCurrentPosition(...)`, i.e. "Access Status" reports `SUCCESS`
2. `navigator.permissions.query({ name: 'geolocation' })`, i.e. "Permission Status" still reports `PROMPT`
3. When I reload the page, the permission status now reports `GRANTED`

We want to provide a consistent end-to-end experience between content-area UI and browser-side UX. To do that, we need to understand how the browser UX will behave if (for example) we call the browser’s geolocation API -- will a permission prompt be shown? Or is the permission already granted or denied?

The permission API should return `GRANTED` if and only if getCurrentPosition() will not be blocked by permissions framework.

We can then adjust our content-area UI to tailor nicely with the browser-side UX, which is inferred from the returned permissions status from the `query()` API, and the associated semantics [outlined here](https://w3c.github.io/permissions/#permissions). For this reason, it is critical for us that we can rely, across all browsers, on the returning the fresh state, without necessitating reloads.

[Radar WebKit Bug Importer]

<rdar://problem/129867643>