Mirage JS

Mirage JS is a client-side server library for JavaScript applications, designed to mock API requests during development, testing, and prototyping. It intercepts network requests (XHR and Fetch) and returns defined responses, allowing front-end development to proceed independently of a live backend. The current stable version is 0.1.48, with an experimental 0.2.x alpha branch actively exploring integration with MSW as an alternative interceptor to the default Pretender. Mirage JS is distinguished by its full-featured ORM-like data layer, including models, factories, and serializers, which enables complex data relationships and realistic mock API interactions, setting it apart from simpler request mocking tools. Its release cadence appears to be several patches per month on the 0.1.x branch, with larger architectural changes being developed in the 0.2.x alpha line.