CODE EXAMPLE FOR JAVASCRIPT

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 ]