JAVASCRIPT

js push to start of array

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

push element to array to first place js

let arr = [4, 5, 6]

arr.unshift(1, 2, 3)
console.log(arr);
// [1, 2, 3, 4, 5, 6]

js add element to front of array

//Add element to front of array
var numbers = ["2", "3", "4", "5"];
numbers.unshift("1");
//Result - numbers: ["1", "2", "3", "4", "5"]

insert element at beginning of array javascript

// Use unshift method if you don't mind mutating issue
// If you want to avoid mutating issue
const array = [3, 2, 1]

const newFirstElement = 4

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

console.log(newArray);

Add an item to the beginning of an Array

let newLength = fruits.unshift('Strawberry') // add to the front
// ["Strawberry", "Banana"]

how add an element on an array in the beginning on js

In JavaScript, you use the unshift() method 
to add one or more elements to the beginning 
of an array and it returns the array's 
length after the new elements have been added.


example:

var colors = ['white', 'blue'];

colors.unshift('red'); 
console.log(colors);

// colors = ['red', 'white', 'blue']

var numbers = [2, 3, 4, 5];
numbers.unshift(1);

console.log(numbers);
//  numbers: [ 1, 2, 3, 4, 5 ]

How can I add new array elements at the beginning of an array in JavaScript?

var arr = [23, 45, 12, 67];
arr = [34, ...arr]; // RESULT : [34,23, 45, 12, 67]

console.log(arr)

how add element at beginning of array in javascript using splice

Array.splice(position,0,new_element_1,new_element_2,...);
Code language: JavaScript (javascript)

Push object to beginning of the array

this.setState(prevState => ({
  myArray: [ {"name": "object"}, ...prevState.myArray]
}))