Making Gmail Addon Accessible Without Clicking on

Question

I have been trying to develop a Gmail Addon with Google Appsscript. Just like the calendar, I want my addon to be accessible without clicking on an email. To clarify, as soon as gmail opens, I want the addon to be visible. Is this possible?

Thanks, Sebastian

Answer 1

Not currently possible. Non-google Add-ons only show for an open email.

When the user opens a Gmail message that meets the trigger criteria* the trigger fires [and the Add-on runs].

*Currently, the only contextual trigger type available is unconditional, which triggers for all emails regardless of content. (src)