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npm · #2047 most downloaded on npm
JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.
Last release 4 days ago
30 Sep 2026
Release timing varies
gaps range from 2 weeks to 12 months
Some releases are documented
notes for 31 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
8 years old
84 releases · first in 2018
chore: update dependencies 5f8a07a
Full Changelog: v5.5.6...v5.5.7
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One column per quarter.
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chore: publish to npm from the release script, the publish workflow's token is dead and local publish is what every other repo does b6fe35e
Full Changelog: v5.5.1...v5.5.2
chore: update dependencies 7d12e09
chore: build b9ffca0 feat: add isInteger f8f4f01 v5.3.0...v5.4.0
chore: build 4b0963d feat: add isBigInt 978cff2 chore: upgrade oxlint 8e9ab10 lint 66e1c2a ⚓️ Oxlint f22bd88 v5.2.1...v5.3.0
chore: update dependencies ab09cc9
feat: Add isHexDecimal function to check for valid MongoId ( #89 ) cd8d328
build: release via github actions 26a7424
fix: security issue via npm audit 54af9ea
lint: allow any with warning 312ffc3
chore: update dependencies b8a4d37
Merge pull request #87 from mesqueeb/v5 0d1ed5c
chore: update dependencies 3b350b4
https://github.com/mesqueeb/is-what/compare/v4.1.15...v4.1.16
https://github.com/mesqueeb/is-what/compare/v4.1.15-0...v4.1.15
https://github.com/mesqueeb/is-what/compare/v4.1.15-0...v4.1.15
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Put prettier in package.json (#54) b786aa7
https://github.com/mesqueeb/is-what/compare/v4.1.12...v4.1.13
build: update main branch b4f4d2a
isInstanceOf(value, classNameOrClass) (#38) 5895bc8https://github.com/mesqueeb/is-what/compare/v4.1.11...v4.1.12
https://github.com/mesqueeb/is-what/compare/v4.1.10...v4.1.11
https://github.com/mesqueeb/is-what/compare/v4.1.10...v4.1.11
fix: emit declarations files twice (for both module types) (#34) 910f121
https://github.com/mesqueeb/is-what/compare/v4.1.9...v4.1.10
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chore: update dependencies f801fa8
types condition to the front (#33) 6cfd42fhttps://github.com/mesqueeb/is-what/compare/v4.1.8...v4.1.9
chore: update dependencies 3c550db
https://github.com/mesqueeb/is-what/compare/v4.1.7...v4.1.8
chore: update dependencies 29cc2f0
https://github.com/mesqueeb/is-what/compare/v4.1.6...v4.1.7
chore: fix npm dependency 72f85b8
https://github.com/mesqueeb/is-what/compare/v4.1.3...v4.1.6
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https://github.com/mesqueeb/is-what/compare/v4.1.2...v4.1.3
https://github.com/mesqueeb/is-what/compare/v4.1.2...v4.1.3
https://github.com/mesqueeb/is-what/compare/v4.1.1...v4.1.2
https://github.com/mesqueeb/is-what/compare/v4.1.1...v4.1.2
https://github.com/mesqueeb/is-what/compare/v4.1.0...v4.1.1
https://github.com/mesqueeb/is-what/compare/v4.1.0...v4.1.1
feat: add isPositiveNumber / isNegativeNumber 35623b9
https://github.com/mesqueeb/is-what/compare/v4.0.0...v4.1.0
doesn't use commonJS anymore (see more on why here)
https://github.com/mesqueeb/is-what/compare/v3.14.1...v4.0.0
https://github.com/mesqueeb/is-what/compare/v3.14.0...v3.14.1
https://github.com/mesqueeb/is-what/compare/v3.14.0...v3.14.1
fix: update Record<string, any> to Record<string | number | symbol, any> d08fb9c
https://github.com/mesqueeb/is-what/compare/v3.13.0...v3.14.0
Merge branch 'production' of https://github.com/mesqueeb/is-what into production 0365fa4
others
https://github.com/mesqueeb/is-what/compare/v3.11.1...v3.13.0
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Starting version 3.0 i've deprecated isObject as checker, since it's too ambiguous. It's much better to be accurate between "any kind of object" and j…
Now averaging about 400,000 weekly downloads!!!
Thanks so much for all the support on is-what!
Starting version 3.0 i've deprecated isObject as checker, since it's too ambiguous.
It's much better to be accurate between "any kind of object" and just a "plain JS object".
See the documentation here.
<sub>--<br>is-what was made with ♥ by Luca Ban.<br>If this library helped you in any way you can support me by buying me <a href="https://www.buymeacoffee.com/mesqueeb">a cup of coffee</a>. ☕️</sub>
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