Applying google script to all sheets except specific - google-apps-script

Question

I am very new to google script trying to resolve key issues in business flow.
Through search have come up with the below script for multi-level data validation for sheet Template.
How can I edit this script to run for all Sheets except specific ones (ex. Sheet1, Sheet 2)
I have found the option of excluding sheets with the code below, but not sure how to use it and where to input it
var excludes = [];
// if (excludes.indexOf(s.getName()) != -1) return;
Thanks you in advance
var mainwsMaster = "Template";
var MenuWSname = "Master Menu"
var ws = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(mainwsMaster);
var wsMenu = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(MenuWSname);
var Menu = wsMenu.getRange(2,1,wsMenu.getLastRow()-1,3).getValues();
var firstColumn = 8;
var secondColumn = 9;
var thirdColumn = 10;
function onEdit(e){
var activeCell = e.range;
var val = activeCell.getValue();
var r = activeCell.getRow();
var c = activeCell.getColumn();
var wsName = activeCell.getSheet().getName();
if(wsName === mainwsMaster && c === firstColumn && r > 6){
applyFirstLevelValidation(val,r)
} else if(wsName === mainwsMaster && c === secondColumn && r > 6){
applySecondLevelValidation(val,r);
}
}//end onEdit
function applyFirstLevelValidation(val,r){
if(val === ""){
ws.getRange(r,secondColumn).clearContent();
ws.getRange(r,secondColumn).clearDataValidations();
ws.getRange(r,thirdColumn).clearContent();
ws.getRange(r,thirdColumn).clearDataValidations();
} else {
ws.getRange(r,secondColumn).clearContent();
ws.getRange(r,secondColumn).clearDataValidations();
ws.getRange(r,thirdColumn).clearContent();
ws.getRange(r,thirdColumn).clearDataValidations();
var filteredOptions = Menu.filter(function(o){return o[0] === val });
var filteredpiata = filteredOptions.map(function(o){return o[1] } );
var cell = ws.getRange(r,secondColumn);
applyValidationToCell(filteredpiata,cell);
}
}
function applySecondLevelValidation(val,r){
if(val === ""){
ws.getRange(r,thirdColumn).clearContent();
ws.getRange(r,thirdColumn).clearDataValidations();
} else {
ws.getRange(r,thirdColumn).clearContent();
var firstLevelColValue = ws.getRange(r, firstColumn).getValue();
var filteredOptions = Menu.filter(function(o){return o[0] === firstLevelColValue && o[1] === val });
var filteredpiata = filteredOptions.map(function(o){return o[2] } );
var cell = ws.getRange(r,thirdColumn);
applyValidationToCell(filteredpiata,cell);
}
}
function applyValidationToCell(list,cell){
var rule = SpreadsheetApp
.newDataValidation()
.requireValueInList(list)
.setAllowInvalid(false)
.build();
cell.setDataValidation(rule);
}

Answer 1

You mentioned this code:
var excludes = [];
// if (excludes.indexOf(s.getName()) != -1) return;
for your code it would look like this instead:
var excludes = ["Sheet1","Sheet2","OtherSheetToExclude","ETC"];
if (excludes.indexOf(wsName) != -1) {return};
You would place those two lines just after the wsName variable is declared in your onEdit(e) script.
It's basically saying. "Take the name of the sheet you've just edited and look for it in this list i just made called "Excludes". If you find it in there, STOP running this function."

Answer 2

Try
var excludes = ['Sheet1','Sheet2'];
and then, change as following
if( excludes.indexOf(wsName) == -1 && c === firstColumn && r > 6)
for instance, focused on the onEdit function
var firstColumn = 8;
var secondColumn = 9;
var excludes = ['Sheet1','Sheet2'];
function onEdit(e){
var activeCell = e.range;
var val = activeCell.getValue();
var r = activeCell.getRow();
var c = activeCell.getColumn();
var wsName = activeCell.getSheet().getName();
if(excludes.indexOf(wsName) == -1 && c === firstColumn && r > 6){
activeCell.getSheet().getRange('A1').setValue('cas1')
} else if(excludes.indexOf(wsName) == -1 && c === secondColumn && r > 6){
activeCell.getSheet().getRange('A1').setValue('cas2')
}
}//end onEdit