OP solved it, closing

Somebody, please. I also need an explanation

Hello! I'm sorry, but what is it - andyou: [Function: andyou]?
I take this object to my VScode and I get an error.
Sorry for my English.

{ one: '1',
two: 2,
three: false,
four: {},
another: '3',
andit: [],
andyou: [Function: andyou],
whatabout: { andone: 'and another', andtwo: 2, andthree: 'and again' },
lastkey: [ [ [Array], false ], 0 ] }