Pretender.js

Spec sheet

What it does

Pretender is a mock server library for XMLHttpRequest and Fetch with an Express- or Sinatra-style syntax for defining routes and handlers.Read 11 Oct 2026 · github.com

Purpose

Pretender is a mock server library for XMLHttpRequest and Fetch with an Express/Sinatra-style routing syntax.Read 4 Oct 2026 · github.com

License

The package metadata identifies the license as MIT.Read 11 Oct 2026 · github.com

Browser only

Pretender temporarily replaces native XMLHttpRequest and Fetch to intercept requests, and the README says it only works in the browser.Read 11 Oct 2026 · github.com

Cleanup

The README instructs users to call shutdown() when finished to restore the native XMLHttpRequest object.Read 11 Oct 2026 · github.com

Installation

The README shows installation with yarn add -D pretender or npm install --save-dev pretender.Read 4 Oct 2026 · github.com

Maintenance activity

The Pretender organization page lists the repository as updated Jan 29, 2024.Read 11 Oct 2026 · github.com

Module use

The README shows Pretender loaded directly in a browser or imported as a module.Read 4 Oct 2026 · github.com

Pass-through

Configured requests can pass through Pretender and be sent as real XMLHttpRequests.Read 11 Oct 2026 · github.com

Request tracking

Pretender tracks handled, unhandled, and pass-through requests, and request tracking can be disabled with an option.Read 11 Oct 2026 · github.com

Response timing

Routes can respond asynchronously, synchronously, after a delay, or only when manually resolved.Read 4 Oct 2026 · github.com

Responses

Route handlers can return a response array containing an HTTP status, headers, and body, or return a Promise.Read 11 Oct 2026 · github.com

Route methods

The routing DSL supports GET, PUT, POST, DELETE, PATCH, and HEAD methods.Read 11 Oct 2026 · github.com

Support and community

The project asks community members to follow its Code of Conduct and directs reports to a maintainer.Read 4 Oct 2026 · github.com

Support channel

The project repository provides an Issues page for reporting and discussing issues.Read 11 Oct 2026 · github.com

Timing controls

Routes can respond asynchronously, synchronously, after a delay, or only when manually resolved.Read 11 Oct 2026 · github.com

Usage

The README documents installation with npm or Yarn, direct browser script loading, and importing Pretender as a module.Read 11 Oct 2026 · github.com

Where Specifiction places it

• API Mocking Tools#25 of 266.4