IssueTracker

would be useful!

much needed

I need to monitor active sheet because I have different side bar for every sheet. What I'm doing now is running a JavaScript from the client side every 1s (second) to call google.script.run.monitorTabChange();. This function reads current active sheet's name and compares it with a sheet name that had been saved in a PropertyService during the last call of google.script.run.monitorTabChange();.
The spreadsheet with this script helps me with creating Purchase Orders. It pulls data from Salesforce and Quickbooks and generates a PO. So for every PO for every customer I am duplicating the spreadsheet and of course the script. The problem that I am facing is running out of quota. I have generated tons of POs already and each of them runs (even if the spreadsheet is not opened - I tested it) the 'monitorTabChange' function, which calls PropertyService. I have 100 000 quota for PropertyService calls. And I'm running out of it pretty quickly now.
The trigger 'OnSheetChange' would then save me (probably many others too) from this issue. At the same time it would saved Google tons of execution overhead (that could be significant if lots of people use the solution I do to track the sheet change).
Thanks!

will really appreciate this feature :)

I'd like an onSwitchSheets event trigger with the following information available:
The sheet I'm switching from, active cell I'm switching from, active row I'm switching from, active col I'm switching from etc.
The sheet I'm switching to with ability to:
- land in a specific cell
- modify the contents of a cell or range of cells in the switch to sheet
- initiate a re-calculate in the target sheet after changes have been made.

Even better... onPreSwitch, onSwitch, onPostSwitch

Excessive code is required to implement the functionality I'm chasing without these hooks.

Any news from Google team?
i Would like to re-hide hidden sheets when user leaves it

Hey Google,
   This feature is highly in need for us. Can you please respond?

This trigger would also be useful for the code I'm working on.

very mandatory

Needed!

would be greatly apreciated

I need something like this too

Yes please - I have a goto last row but it only runs on open; would be great to run on every tab/sheet change

Come on... I was happy to see the way Google implemented apps vs MS vba and decided to convert several off my office documents to google sheets, but there is no way this is going to happen without support for this "onSheetChange" feature. It really makes me wonder how many  other basic features are missing in sheets. It only took 10 min. of investigation to put sheets on hold....

I have a sidebar that shows filters for the active sheet - when you change the sheet I need to reconfigure my sidebar.

At the moment I use a mouse-over event on my sidebar AND a timer function to constantly monitor the current sheet.

It would be so much better if there were a trigger on sheet change.

Thanks

Really need this feature and it seems like something that would be very simple to implement.  Knowing the current sheet is crucial for lots of operations and constantly checking that it hasn't changed seems very wasteful.

Need this, too

One and a half year, no update yet...

Oh come on Google folks!  Surely you can incorporate this!  Soooooooooo many people want this and really need it!

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Please Google team - this would be very helpful!!

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Hello?  Can't believe this hasn't been added yet.

Is this getting added ? Google team are you guys listening?

I really need this trigger. Please add. Is anyone responding to this request?

There is at least 1 workaround posted about that I know of if anyone is desperate. It's a bit pffft though based on a timer from memory. I'm not that desperate ...

I haven't actually tried them & I know some voters here may even be the contributors but in case anyone is frazzled for a workaround & hasn't come across them, even if a bit hacky >>
https://stackoverflow.com/questions/38160116/trigger-when-user-switches-between-sheets
https://webapps.stackexchange.com/questions/91812/how-can-i-trigger-a-function-when-switching-sheets-within-a-spreadsheet

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need it also

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Needed

On change sheet would be very useful

Really needed.

Needed. I want to reset something as soon as a particular sheet is viewed.