javascript add item on top of array code example

Example 1: javascript add new array element to start of array

var colors = ["white","blue"];
colors.unshift("red"); //add red to beginning of colors
// colors = ["red","white","blue"]

Example 2: javascript unshift

let array = ["A", "B"];
 let variable = "what you want to add";

//Add the variable to the beginning of the array
 array.unshift(variable);

//===========================
 console.log(array);
//output =>
//["what you want to add" ,"A", "B"]

Example 3: how to push at top of array

const array = [3, 2, 1]

const newFirstElement = 4

const newArray = [newFirstElement].concat(array) // [ 4, 3, 2, 1 ]

console.log(newArray);