unshift method
The unshift method adds an
unlimited number of new elements to
the beginning of an array. In this
case, the original array is modified,
and the new length of the array is
returned as a result.
Syntax
array.unshift(element, element, element...);
Example
Let's add two more new elements to the beginning of an array and output the modified array:
let arr = ['a', 'b', 'c', 'd', 'e'];
arr.unshift('1', '2');
console.log(arr);
The code execution result:
['1', '2', 'a', 'b', 'c', 'd', 'e']
Example
Let's add two new elements and output the new length of an array:
let arr = ['a', 'b', 'c', 'd', 'e'];
let length = arr.unshift('1', '2');
console.log(length);
The code execution result:
7
