Google Apps Script Redeclaration of Const Error

Question

Given this Google Apps Script script:

\'use strict\'
const foo = 2;
function bar() {
  Logger.log(foo + 2);
}

Running the function bar

Answer 1

From Apps Script const scoping problems

Avoid using const in Apps Script for now. It just doesn't work as it should. For now it's just a half baked version of var.

From the same source

Apps Script is based on ES3 JavaScript, with quite a few additions from ES5 and even ES6.

To read the primary source go to https://developers.google.com/apps-script/guides/services/#basic_javascript_features