Get a subset of a JavaScript object's properties

Last Updated : 19 Aug, 2026

In JavaScript, you can create a subset of an object by selecting only the required properties. This is useful for extracting specific data without modifying the original object.

  • Use object destructuring to select specific properties.
  • Use Object.entries() with filter() for dynamic property selection.
  • Use Lodash's _.pick() when working with multiple selected properties.

Approach 1: Using Object Destructuring

Object destructuring allows you to extract specific properties from an object and create a new object containing only those properties.

JavaScript 
const obj = {
    property1: 5,
    property2: 6,
    property3: 7
};

const { property1, property3 } = obj;

const subset = {
    property1,
    property3
};

console.log(subset);

Output
{ property1: 5, property3: 7 }

Syntax: 

const { property1, property3 } = obj;

const subset = {
    property1,
    property3
};

Approach 2: Using Object.entries() and filter()

Object.entries() converts the object into an array of key-value pairs. The filter() method can then select only the required properties, and Object.fromEntries() converts them back into an object.

JavaScript 
const obj = {
    name: "John",
    age: 25,
    city: "Delhi",
    country: "India"
};

const requiredKeys = ["name", "city"];

const subset = Object.fromEntries(
    Object.entries(obj).filter(([key]) =>
        requiredKeys.includes(key)
    )
);

console.log(subset);

Output
{ name: 'John', city: 'Delhi' }

Syntax: 

Object.fromEntries(
    Object.entries(obj).filter(([key]) =>
        requiredKeys.includes(key)
    )
);

Approach 3: Using Object.keys() and reduce()

Object.keys() returns the object's property names, while reduce() can be used to build a new object containing only the selected properties.

JavaScript 
const obj = {
    name: "John",
    age: 25,
    city: "Delhi",
    country: "India"
};

const requiredKeys = ["name", "country"];

const subset = requiredKeys.reduce((result, key) => {
    if (key in obj) {
        result[key] = obj[key];
    }
    return result;
}, {});

console.log(subset);

Output
{ name: 'John', country: 'India' }

Approach 4: Using Lodash _.pick()

Lodash provides the _.pick() method to create a new object containing only the specified properties.

JavaScript 
const _ = require("lodash");

const obj = {
    name: "John",
    age: 25,
    city: "Delhi",
    country: "India"
};

const subset = _.pick(obj, ["name", "city"]);

console.log(subset);

Output:

{ name: 'John', city: 'Delhi' }

Syntax:

_.pick(object, [paths]);

Note: For a small, fixed set of properties, object destructuring is concise and readable. For dynamically selecting properties, Object.entries() with filter() is generally more flexible.

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