add elements of array to array javascript 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: array insertion javascript
Array.prototype.insert = function ( index, item ) {
this.splice( index, 0, item );
};