# onParticipantChange does not seem to work

**URL:** <https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227>\
**Category:** App Marketplace\
**Created:** [June 27, 2022, 2:19pm UTC](https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227 "2022-06-27T14:19:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![auke.vanscheltinga](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@auke.vanscheltinga](https://devforum.zoom.us/u/auke.vanscheltinga)\
**Post date:** [June 27, 2022, 2:19pm UTC](https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227/1 "2022-06-27T14:19:11Z")

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Using this syntax:

zoomSdk.onParticipantChange((event) =\> {  
console.log(event)  
});

I don’t see any debug message when someone joins or leaves the meeting.  
Am I doing something wrong? No errors on my console.

Kind regards,  
Auke van Scheltinga

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**Author:** ![gianni.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/gianni.zoom/32/32523_2.png) [@gianni.zoom](https://devforum.zoom.us/u/gianni.zoom)\
**Post date:** [July 6, 2022, 10:43pm UTC](https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227/2 "2022-07-06T22:43:11Z")

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Hi @auke.vanscheltinga , which SDK and version are you using please? Please move this post to the appropriate SDK channel within the forum by clicking the edit (pencil) icon by the title.

Are you able to replicate this with the sample app version?

Thanks!

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<div class="post-metadata">

**Author:** ![auke.vanscheltinga](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@auke.vanscheltinga](https://devforum.zoom.us/u/auke.vanscheltinga)\
**Post date:** [July 7, 2022, 6:36am UTC](https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227/3 "2022-07-07T06:36:28Z")

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Hmm this issue took a different turn in the meanwhile, It works for joining and leaving, but not for changing attendees to cohost. (role change notifications)

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [August 6, 2022, 4:37pm UTC](https://devforum.zoom.us/t/onparticipantchange-does-not-seem-to-work/71227/4 "2022-08-06T16:37:25Z")

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Closed on August 6, 2022, 4:37pm UTC

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