add array to array javascript

var colors= ["red","blue"];
	colors.push("yellow"); //["red","blue","yellow"]var colors=["red","white"];
colors.push("blue");//append 'blue' to colorsconst array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = array1.concat(array2);var colors= ["red","blue"];
	colors.push("yellow"); array.push(element) // SPREAD OPERATOR
 const list1 = ["pepe", "luis", "rua"];
 const list2 = ["rojo", "verde", "azul"];
 const newList = [...list1, ...list2];
 // ["pepe", "luis", "rua", "rojo", "verde", "azul"]