Response

`Response`

Creates a new Response object representing a response to a request

Syntax

JavaScript

new Response(body?, init?)

Parameters

Parameter	Type	Description
body	BodyInit \| null	The body of the response (Blob, ArrayBuffer, string, ReadableStream, etc.)
init	ResponseInit	Options: status, statusText, headers

Return Value

A new Response object

Examples

Basic Usage

const response = new Response(JSON.stringify({ ok: true }), {
  status: 200,
  headers: { 'Content-Type': 'application/json' }
})
console.log(response.status) // 200

Practical Example

const notFound = new Response('Not Found', { status: 404 })
console.log(notFound.ok) // false

Advanced Usage

function mockResponse<T>(data: T, status = 200) {
  return new Response(JSON.stringify(data), {
    status,
    headers: { 'Content-Type': 'application/json' }
  })
}

Understanding Response

The Response method in JavaScript creates a new Response object representing a response to a request. It belongs to the Response object and is one of the most widely used methods for working with response values in modern JavaScript and TypeScript applications.

The method signature is new Response(body?, init?). It accepts 2 parameters: body, init. When called, it returns a new response object. Understanding when and how to use Response() helps you write more expressive, readable code.

Common use cases for Response include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like request-constructor, fetch-response-json, response-json-static, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for Response 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.