How do I detect when I view an email in gmail with

Question

I'd like to trigger a script every time I view an email in gmail. Does anyone know if there a trigger for detecting this which i can bind to?

I'm open to doing this with any platform, not just google-apps-script.

Answer 1

Short answer

At this time Google Apps Script doesn't have a triggers for Gmail events.

Explanation

On Google Apps Script there are three kinds of scripts, bounded, stand-alone and web apps, and two kinds of triggers, simple and installable

Scripts only could be bounded to documents, forms and spreadsheets.

The available simple triggers are:

• onOpen(e)^1,2,3
• onEdit(e)²
• onInstall(e)⁴
• doGet(e)⁵
• doPost(e)⁵

The available installable triggers are:

• Time-driven triggers
• Google Apps triggers
  • on open^1,2,3
  • on edit²
  • on change²
  • on submit form^2,3

Triggers by app

The triggers works on the following "environments":

1. Google Documents editor
2. Google Sheets editor
3. Google Forms editor
4. Add-ons
5. Web Apps

Note: There are no simple nor installable that works on the Google Forms Viewer (response submission).

References

• https://developers.google.com/apps-script/guides/standalone
• https://developers.google.com/apps-script/guides/triggers/
• https://developers.google.com/apps-script/guides/triggers/events