Object

`Object.entries`

Returns an array of a given object's own enumerable string-keyed property key-value pairs

Syntax

JavaScript

Object.entries(obj)

Parameters

Parameter	Type	Description
obj	object	The object whose enumerable own property pairs are to be returned

Return Value

An array of [key, value] pairs

Examples

Basic Usage

const obj = { a: 1, b: 2, c: 3 };
console.log(Object.entries(obj)); // [['a', 1], ['b', 2], ['c', 3]]

Practical Example

const user = { name: 'Alice', age: 30 };
for (const [key, value] of Object.entries(user)) {
  console.log(`${key}: ${value}`);
}

Advanced Usage

const obj = { x: 1, y: 2 };
const map = new Map(Object.entries(obj));
console.log(map.get('x')); // 1

Understanding Object.entries

The Object.entries method in JavaScript returns an array of a given object's own enumerable string-keyed property key-value pairs. It belongs to the Object object and is one of the most widely used methods for working with object values in modern JavaScript and TypeScript applications.

The method signature is Object.entries(obj). It accepts 1 parameter: obj. When called, it returns an array of [key, value] pairs. Understanding when and how to use entries() helps you write more expressive, readable code.

Common use cases for Object.entries include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like object-keys, object-values, object-fromentries, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for Object.entries 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.