how to add a new item 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: js add to array

let arr = [1, 2, 3, 4];

arr = [...arr, 5, 6, 7];

console.log(arr);