how to push array to array in javascript code example

Example 1: javascript append element to array

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

Example 2: javascript add element to array

const langages = ['Javascript', 'Ruby', 'Python'];
langages.push('Go'); // => ['Javascript', 'Ruby', 'Python', 'Go']

const dart = 'Dart';
langages = [...langages, dart]; // => ['Javascript', 'Ruby', 'Python', 'Go', 'Dart']