Array

`Array.prototype.pop`

Removes the last element from an array and returns that element, changing the length of the array

Syntax

JavaScript

array.pop()

Return Value

The removed element, or undefined if the array is empty

Examples

Basic Usage

const plants = ['broccoli', 'cauliflower', 'kale'];
const last = plants.pop();
console.log(last); // 'kale'
console.log(plants); // ['broccoli', 'cauliflower']

Practical Example

const stack = [1, 2, 3];
while (stack.length) {
  console.log(stack.pop());
}
// 3, 2, 1

Advanced Usage

const arr: number[] = [];
console.log(arr.pop()); // undefined

Understanding Array.prototype.pop

The Array.prototype.pop method in JavaScript removes the last element from an array and returns that element, changing the length of the array. It belongs to the Array object and is one of the most widely used methods for working with array values in modern JavaScript and TypeScript applications.

The method signature is array.pop(). When called, it returns the removed element, or undefined if the array is empty. Understanding when and how to use pop() helps you write more expressive, readable code.

Common use cases for Array.prototype.pop include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like array-push, array-shift, array-splice, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for Array.prototype.pop is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.

Browser Compatibility

Supported in all modern browsers (Chrome, Firefox, Safari, Edge) and Node.js. Part of the ECMAScript standard.

Related Methods

Array.prototype.push

Adds the specified elements to the end of an array and returns the new length of the array

Array.prototype.shift

Removes the first element from an array and returns that removed element, changing the length of the array

Array.prototype.splice

Changes the contents of an array by removing or replacing existing elements and/or adding new elements in place

Array.prototype.at

Takes an integer value and returns the item at that index, allowing for positive and negative integers where negative integers count back from the last item