fix localstorage issues

[WebReflection]

This LGTM but I wonder if we should link also this paragraph to enable localStorage on occasions: https://developer.mozilla.org/en-US/docs/Web/API/Storage_Access_API/Using#accessing_a_users_cookies_in_an_embedded_cross-origin_iframe

[ntoll]

Fixed by #55

[WebReflection]

I often forget Python can act like a Proxy via classes and this PR kinda enlightened me around this topic.

As yesterday I was digging to provide a fallback I'd like, for history sake, to write down how I would personally shim the localStorage on the JS side when its' not available, forgetting in the process about persistent saves (it requires window.name shenanigans there to work persistently, but that still will be more like a sessionStorage instead).

const localStorage = new Proxy(new Map, {
  deleteProperty(map, key) {
    map.delete(key);
    return true;
  },
  get(map, name) {
    switch (name) {
      case 'clear': return () => { map.clear() };
      case 'getItem': return key => map.get(key) ?? null;
      case 'key': return i => [...map][i]?.[0];
      case 'removeItem': return key => { map.delete(key); };
      case 'setItem': return (key, value) => { map.set(key, value); };
      case 'length': return map.size;
      default: return map.get(name);
    }
  },
  set(map, key, value) {
    map.set(key, value);
  }
});

If we ever need this in the future, it's been also tested and it works as expected as 1:1 API replacement.

[fpliger]

This LGTM but I wonder if we should link also this paragraph to enable localStorage on occasions: https://developer.mozilla.org/en-US/docs/Web/API/Storage_Access_API/Using#accessing_a_users_cookies_in_an_embedded_cross-origin_iframe

Cool. Totally ignored that :)

If we ever need this in the future, it's been also tested and it works as expected as 1:1 API replacement.

TY @WebReflection !