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I'd like to perform an action (while I'm presenting a Google Slides App) each time I progress from one slide to another. Is there such a trigger? If there isn't how could I implement that?

Looking at the progress example (https://github.com/googlesamples/apps-script/blob/master/slides/progress/progress.gs) that's just generates the progress bar into each slide during installation.

Csaba Toth
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    I'm not sure that is possible. In that example it looks like it generates static bars and puts them in each existing slide. It doesn't update dynamically. – Chris Feb 18 '18 at 06:17
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    There isn't a trigger for slide change, but you can create Chrome extension that will track slide change, here's sample one: https://chrome.google.com/webstore/detail/remote-for-slides/pojijacppbhikhkmegdoechbfiiibppi?hl=en – Kos Feb 18 '18 at 12:33
  • @Kos that's actually a good idea for an implementation, although it'll be outside of AppScripts. But can fulfill what I'd like to do (send notification when slide change). – Csaba Toth Feb 19 '18 at 02:36

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No, there isn't. Unfortunately Google Apps Script hasn't a built-in feature to implement custom-triggers.

Reference

Rubén
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