How to access quirk values in edge functions

To access quirk values in edge functions, you need to enable quirks to be transitioned between server/edge/client environments. This is accomplished by configuring the CookieTransitionDataStore with experimental quirks support.

Configuration

When creating your Context in the edge function, include the following configuration:

const context = new Context({
    manifest: manifest as ManifestV2,
    defaultConsent: true,
    transitionStore: new CookieTransitionDataStore({
        cookieName: 'ufvd',
        serverCookieValue: cookieValue,
        quirkCookieName: 'ufvdqk',
        quirkCookieValue: quirkCookieValue,
        experimental_quirksEnabled: true,
    }),
});

The key settings for quirk access are:

• quirkCookieName: 'ufvdqk' - Specifies the cookie name for storing quirk data

• quirkCookieValue: quirkCookieValue - The actual quirk cookie value from the request

• experimental_quirksEnabled: true - Enables the experimental quirks feature

How it works

With this configuration, quirks are stored in cookies via the CookieTransitionDataStore, making them accessible on the server-side. This allows you to:

• Check existing quirk values before setting new ones

• Implement conditional logic based on current quirk states

• Maintain quirk persistence across server and client environments

Once configured, you can access and manipulate quirk values in your edge function using the standard Context API methods.