Node.js unshift() function
Last Updated :
12 Jul, 2025
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unshift() is an array function from Node.js that is used to insert elements to the front of an array.
Syntax:
array_name.unshift(element)
Parameter: This function takes a parameter that has to be added to the array. It can take multiple elements also as parameters.
Return type: The function returns the array after adding the element. The program below demonstrates the working of the function:
Example 1:
function unshiftDemo() {
const element = arr.unshift(12);
console.log(arr);
}
const arr = [1, 5, 7, 9, 78];
unshiftDemo();
Output:
[12,1,5,7,9,78]
Example 2:
function addLang() {
const element = arr.unshift("Node.js", "php");
console.log(arr);
}
const arr = ["C", "Java", "JavaScript", "Python"];
addLang();
Output:
[ 'Node.js', 'php', 'C', 'Java', 'JavaScript', 'Python' ]
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