@msw/data

Data querying library for testing JavaScript applications.

Motivation

This library exists to help developers model and query data when testing and developing their applications. It acts as a convenient way of creating schema-based fixtures and querying them with a familiar ORM-inspired syntax. It can be used standalone or in conjuncture with Mock Service Worker for seamless mocking experience both on the network and the data layers.

Features

• Relies on Standard Schema instead of inventing a proprietary modeling syntax you have to learn. You can use any Standard Schema-compliant object modeling library to describe your data, like Zod, ArkType, Valibot, yup, and many others.
• Full runtime and type-safety.
• Provides a powerful querying syntax (inspired by Prisma);
• Supports relations for database-like behaviors (inspired by Drizzle);
• Supports extensions (including custom extensions) for things like cross-tab collection synchronization or record persistence.

Documentation

• Getting started
• Querying
• Relations
• Extensions
• API reference