ES6 - Array Method unshift()

unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.

Syntax

array.unshift( element1, ..., elementN );      

Paremeter Details

• element1, ..., elementN − The elements to add to the front of the array.

Return Value

Returns the length of the new array. It returns undefined in IE browser.

Example

var arr = new Array("orange", "mango", "banana", "sugar"); 
var length = arr.unshift("water"); 
console.log("Returned array is : " + arr ); 
console.log("Length of the array is : " + length );   

Output

Returned array is : water,orange,mango,banana,sugar 
Length of the array is : 5