Does a notification message count towards the coll

问题:

As per the Firebase Notification docs:

Notification messages are always collapsible.

I was trying to figure out if they have some intrinsic collapse_key. And if so, does that count towards the collapse_key limit of 4 per device?

回答1:

You are correct. All the notifications sent from the Web Console are collapsible.

Which means they have an implicit collapse_key

If a device has a pending-to-be-delivered messages from the Web Console,
this implicit collapse_key counts towards the limit of 4 per device.