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mswjs/data

Data querying library for testing JavaScript applications. observed · 2026-09-01

github.com/mswjs/data · homepage · TypeScript · MIT (permissive) observed · 2026-09-01

Health v2 · maintenance only

100/100

  • Activity 100
  • Release rhythm 100
  • Longevity 100
How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.

  • gap_med: 2.5
  • age_days: 2094
  • days_rel: 3
  • days_push: 3
  • n_releases_24m: 13

Full methodology

Adoption not part of the score

1061 stars · 66 forks observed · 2026-09-01

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A data querying library for testing JavaScript applications that lets developers define schema-based collections and query them with an ORM-inspired syntax. It works standalone or alongside Mock Service Worker to mock data at both the network and data layers.

Use cases

  • create test fixtures for javascript tests
  • mock database layer in unit tests
  • seed test data with faker
  • query in-memory test records with prisma-like syntax
  • mock api responses with msw and test data
  • model relational test data with relations

When to choose

  • you need realistic, schema-validated test data in JavaScript/TypeScript apps
  • you use Mock Service Worker and want consistent data and network mocking
  • you want ORM-style querying of fixtures without a real database

When to avoid

  • you need a real persistent database or production ORM
  • your tests don't involve data modeling or fixtures
  • you work outside the JavaScript/TypeScript ecosystem

Facets

library · maturity active

mocking testing data-generation testing developer-tools databases browser cross-platform orm-inspired fixtures schema-based msw typescript test-data nodejs

1 source

Member repositories

RepositoryRoleHealth v2
mswjs/datamain100

For agents

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Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem