how to add array in array code example

Example 1: add array to array javascript

// SPREAD OPERATOR
 const list1 = ["pepe", "luis", "rua"];
 const list2 = ["rojo", "verde", "azul"];
 const newList = [...list1, ...list2];
 // ["pepe", "luis", "rua", "rojo", "verde", "azul"]

Example 2: how to add to an array

var ar = ['one', 'two', 'three'];
ar[3] = 'four'; // add new element to ar