Package

must

Testing and assertion library with friendly BDD syntax — awesome.must.be.true(). Many expressive matchers and is test runner and framework agnostic. Follows RFC 2119 with its use of MUST. Good and well tested stuff.

v0.13.4, 13 Jan 2017No license fieldCommonJSTypes: BundledTesting

$ npm install must

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 9.2k; +40% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 5; Direct, from package.json
Last release: 9 years ago; v0.13.4
GitHub stars: 338; 37 forks
Open issues / PRs: 21 / 6
Contributors: -
Commits, last 52 weeks: 0

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

9,228 downloads last week, 48,317 in the last month. The 12-month change of +40% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: -
Latest version: 0.13.4, 13 Jan 20179 years ago
First published: -
Last push to GitHub: 8 Jun 20211,934 days before the snapshot
Repository archived: No
Open issues: 21
Open pull requests: 6
Commits, last 52 weeks: 0
Dependents on npm: 21

Major versions

Recent releases

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): -
Dependencies (5): egalkindofoolonglodash.wrapjson-stringify-safe

Install

npm install must

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/must@0.13.4/
unpkghttps://unpkg.com/must@0.13.4/
esm.shhttps://esm.sh/must@0.13.4

Alternatives

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@nightwatch/chai A forked of Chai 5 which adds Promise support in order to work with Nightwatch commands.	41.9k	-	2 years ago	ESM + CommonJS	-
espower-loader Power Assert feature instrumentor on the fly	26.3k	-	9 years ago	CommonJS	-
espower-source Power Assert instrumentor from source to source, with source-map	25.8k	-	8 years ago	CommonJS	-
empower-assert Convert assert to power-assert on ESTree AST	25.3k	-	8 years ago	CommonJS	-

Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): downloads_week 9228 < 10000.