messageDisplay fails on 128.6

[notoken]

Hi,

According to the API documentation, messageDisplay (https://webextension-api.thunderbird.net/en/latest/messageDisplay.html) is still supported in TB 128. However, when I try to load the messageDisplay or messageDisplayScript example as a temporary add-on, I encounter the following error:

TypeError: browser.messageDisplay.onMessageDisplayed is undefined

Am I overlooking something here?

Thanks in advance for your help!

[jobisoft]

In Manifest V3 we only have browser.messageDisplay.onMessagesDisplayed (plural). I will check what is wrong with the example. Thanks for flagging this.

[notoken]

Thanks for the quick response! Switching from onMessageDisplayed to onMessagesDisplayed does resolve the TypeError, but the script's behavior seems incorrect. It only calls the listener once with an empty message, rather than every time a message is displayed as described in the API documentation.

Any ideas on what might be going wrong?

[jobisoft]

Could it be, that in Manifest V3 the event returns a messageList? It would then have a messages object, with the first page of messages.