javascript 3e 3e google script array concat doesn 27t work

1Javascript >> Google Script array concat doesn't work from javascript by Clear Civet on Mar 11 2020
2const array1 = ['a', 'b', 'c'];
3const array2 = ['d', 'e', 'f'];
4const array3 = array1.concat(array2);
5
6console.log(array3);
7// expected output: Array ["a", "b", "c", "d", "e", "f"]
8// console.log and Logger.log do not show array structure. Use JSON.stringify to see correctly.
9Logger.log(JSON.stringify(array3));  // expected output: Array ["a", "b", "c", "d", "e", "f"]