How to get sub variable (title) of array node js?

Question

I have a code like this

const arrayTable = {
        array1 : ['A1', 'A2'],
        array2 : ['B1', 'B2'],
        array3: ['C1', 'C2'],

I want call this sub variable "array1, array2, ..." and input that data to new variable :

var arrayTitle = 'array1', 'array2', 'array3', ...

var arrayTitle = 'array1', 'array2', 'array3', ...

Answer 1

Use Object.keys

var arrayTitle = Object.keys({
  array1: ['A1', 'A2'],
  array2: ['B1', 'B2'],
  array3: ['C1', 'C2'],
});
console.log(arrayTitle);