how to append elements to an array in javascript code example

Example 1: javascript append to array

var colors=["red","white"];
colors.push("blue");//append 'blue' to colors

Example 2: append array js

var colors= ["red","blue"];
	colors.push("yellow"); //["red","blue","yellow"]

Example 3: javascript append array to end of array

const new_array = old_array.concat([value1[, value2[, ...[, valueN]]]])