How to execute a trigger only when one of the sheets is changed

Question

When I have multiple sheets in a spreadsheet, I want to execute a trigger only when One of the Sheets is changed, not the others. OnChange() or OnEdit() is executing the trigger for any data change.

Any suggestions?

Answer 1

We can't limit a trigger to be executed only on certain sheets but we could limit if some parts of the code are executed if a condition is met. For this, we could use JavaScript statements like if, switch, etc.

Simple edit trigger example:

function onEdit(event){
  var sheet = event.range.getSheet();
  if(sheet.getName() === 'Sheet1') {
    //do something
  }
}

Notes:

Some operations doesn't return the active range/sheet, when using a change trigger. Ref. getActiveRange() incorrect in onChange trigger for some column/row operations

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Answer 2

you can specify on which sheet will be script executed (as Rubén's example):

function onEdit(event){
  var sheet = event.range.getSheet();
  if(sheet.getName() === 'Sheet1') {
    //your script
  }
}

or for example only on the active sheet like:

function onEdit(event){ 
  var sheet = event.source.getActiveSheet();
  //your script
}