Web Messaging SDK: Passing custom guest attributes for authenticated users

NICE CXone API & Integrations
1

Need some help troubleshooting the initialization sequence for the Genesys Cloud Web Messaging widget in a Vue 3 app. I am trying to inject custom guest attributes to identify authenticated users without exposing PII in the initial widget load. The documentation suggests using the guestAttributes option, but my current implementation results in the attributes being stripped or ignored by the platform upon connection. I am using the composition API to manage the widget state and ensuring the script loads asynchronously. The code looks like this:

const initWidget = () => {
 const gcWebMessaging = window.genesysCloudWebMessaging;
 if (gcWebMessaging) {
 gcWebMessaging.init({
 deploymentId: 'my-deployment-id',
 region: 'eu-gb',
 guestAttributes: {
 userId: currentUser.value.id,
 role: currentUser.value.role
 }
 });
 }
};

The widget loads fine, but when I check the conversation data in the supervisor dashboard, the userId is null. I suspect the timing of the attribute injection relative to the WebSocket handshake is off. Is there a specific lifecycle hook or method I should be calling after init to ensure these attributes are bound to the session before the first message is sent?

2

TL;DR: use the SDK update method.

You might want to look at the updateGuestAttributes call. docs state “guest attributes can be updated post-initialization.” try this in your setup:

genesysCloudMessaging.updateGuestAttributes({
 custom: { userId: '123' }
});

it works for me.

3

If I remember correctly, sending updates before the connected event triggers a silent drop. The session must be fully established. Verify the guestAttributes payload structure matches the schema exactly. Mismatched types cause the platform to ignore the update without logging an error. Check the network tab for a 204 No Content response to confirm receipt.

4

Have you tried deferring the updateGuestAttributes call until the connected event fires? The 204 No Content response indicates the payload was accepted but potentially discarded due to timing. In my data action orchestration, I map the session ID to a queue and trigger the update only after the WebSocket handshake completes. This prevents the silent drop As noted above.

5

How I usually solve this is by deferring the attribute injection until the WebSocket handshake is confirmed, as premature updates get silently discarded by the platform. The suggestion above regarding the connected event is accurate, but the payload structure must strictly adhere to the schema to avoid silent failures.

Need some help troubleshooting the initialization sequence for the Genesys Cloud Web Messaging widget in a Vue 3 app. I am trying to inject custom guest attributes to identify authenticated users without exposing PII in the initial widget load.

The issue is often timing combined with strict schema validation. You must listen for the connected event before calling updateGuestAttributes. Ensure the custom object contains only string values, as non-string types cause the payload to be ignored. Here is the robust pattern:

genesysCloudMessaging.on('connected', () => {
 genesysCloudMessaging.updateGuestAttributes({
 custom: {
 userId: String(user.id), // Must be string
 sessionId: String(session.id)
 }
 });
});

Verify the network tab for a 204 No Content response. If you see a 400, check your JSON structure. This approach ensures the attributes are bound to the active session correctly.