How to check google script if there is a sheet with the same name in the table as the active one?

Question

Google Apps Script

How to check with google script code if there is a sheet with the same name in the table as the active one?

Answer 1

Most likely, you want to check if there is a sheet with the given name in the workbook. Just take this sheet - it will immediately become clear - it is or it is not.
Example

const sheetName = 'Sheet1';
const sheet = book.getSheetByName(sheetName);
if(sheet){
  cnsole.log(`Лист с именем ${sheetName} есть`);
}

Or, more commonly used, creating a sheet if it doesn't exist

const sheetName = 'Sheet1';
const sheet = book.getSheetByName(sheetName) || book.insertSheet(sheetName);

Answer 2

There cannot be two sheets with the same name.

Answer 3

I expressed myself incorrectly, sorry - check that there is no sheet in the book with the same name as the one being created.