Gathering detailed insights and metrics for typechecker
Gathering detailed insights and metrics for typechecker
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
Installations
npm install typecheckerDeveloper Guide
BETA
Typescript
Yes
Module System
ESM, UMD
Min. Node Version
>=4
Node Version
20.10.0
NPM Version
10.2.3
Score
99.3
Supply Chain
100
Quality
76.2
Maintenance
100
Vulnerability
100
License
Releases
Unable to fetch releases
Languages
2
TypeScript
JavaScript
TypeScript (84.5%)
JavaScript (15.5%)
Developer
bevry
Download Statistics
Total Downloads
0
Last Day
0
Last Week
0
Last Month
0
Last Year
0
GitHub Statistics
NOASSERTION License
50 Stars
353 Commits
6 Forks
4 Watchers
3 Branches
6 Contributors
Updated on May 31, 2025
Bundle Size
3.22 kB
Minified
958.00 B
Minified + Gzipped
Sponsor this package
Maintainers
1
Package Meta Information
Latest Version
9.3.0
Package Id
typechecker@9.3.0
Unpacked Size
103.25 kB
Size
17.65 kB
File Count
18
NPM Version
10.2.3
Node Version
20.10.0
Published on
Dec 27, 2023
Total Downloads
Cumulative downloads
Total Downloads
NaN
Last Day
0%
NaN
Compared to previous day
Last Week
0%
NaN
Compared to previous week
Last Month
0%
NaN
Compared to previous month
Last Year
0%
NaN
Compared to previous year
Weekly Downloads
Monthly Downloads
Yearly Downloads
TypeChecker
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
Why?
Why should I use this instead of say instanceof?
Under certain circumstances instanceof may not return the correct results. This occurs with node's vm module especially, and circumstances where an object's prototype has been dereferenced from the original. As such, for basic == and === checks (like a === null), you're fine not using this, but for checks when you would have done instanceof (like err instanceof Error), you should try to use this instead. Plus things like isPlainObject are darn useful!
Usage
Install
npm
- Install:
npm install --save typechecker - Import:
import * as pkg from ('typechecker') - Require:
const pkg = require('typechecker')
Deno
1import * as pkg from 'https://unpkg.com/typechecker@^9.3.0/edition-deno/index.ts'
Skypack
1<script type="module"> 2 import * as pkg from '//cdn.skypack.dev/typechecker@^9.3.0' 3</script>
unpkg
1<script type="module"> 2 import * as pkg from '//unpkg.com/typechecker@^9.3.0' 3</script>
jspm
1<script type="module"> 2 import * as pkg from '//dev.jspm.io/typechecker@9.3.0' 3</script>
Editions
This package is published with the following editions:
typecheckeraliasestypechecker/index.cjswhich uses the Editions Autoloader to automatically select the correct edition for the consumer's environmenttypechecker/source/index.tsis TypeScript source code with Import for modulestypechecker/edition-browsers/index.jsis TypeScript compiled against ES2022 for web browsers with Import for modulestypechecker/edition-es2022/index.jsis TypeScript compiled against ES2022 for Node.js 6 || 8 || 10 || 12 || 14 || 16 || 18 || 20 || 21 with Require for modulestypechecker/edition-es5/index.jsis TypeScript compiled against ES5 for Node.js 4 || 6 || 8 || 10 || 12 || 14 || 16 || 18 || 20 || 21 with Require for modulestypechecker/edition-es2022-esm/index.jsis TypeScript compiled against ES2022 for Node.js 12 || 14 || 16 || 18 || 20 || 21 with Import for modulestypechecker/edition-types/index.d.tsis TypeScript compiled Types with Import for modulestypechecker/edition-deno/index.tsis TypeScript source code made to be compatible with Deno
History
Discover the release history by heading on over to the HISTORY.md file.
Backers
Code
Discover how to contribute via the CONTRIBUTING.md file.
Authors
- Benjamin Lupton — Accelerating collaborative wisdom.
Maintainers
- Benjamin Lupton — Accelerating collaborative wisdom.
Contributors
- Benjamin Lupton — view contributions
- Joe Gesualdo — view contributions
- Matt Bierner — view contributions
- Sean Fridman — view contributions
Finances
Sponsors
- Andrew Nesbitt — Software engineer and researcher
- Balsa — We're Balsa, and we're building tools for builders.
- Codecov — Empower developers with tools to improve code quality and testing.
- Poonacha Medappa
- Rob Morris
- Sentry — Real-time crash reporting for your web apps, mobile apps, and games.
- Syntax — Syntax Podcast
Donors
- Andrew Nesbitt
- Balsa
- Chad
- Codecov
- entroniq
- Jean-Luc Geering
- Michael Duane Mooring
- Mohammed Shah
- Poonacha Medappa
- Rob Morris
- Sentry
- ServieJS
- Skunk Team
- Syntax
License
Unless stated otherwise all works are:
- Copyright © Benjamin Lupton
and licensed under:
No vulnerabilities found.
Reason
no dangerous workflow patterns detected
Reason
security policy file detected
Details
- Info: security policy file detected: SECURITY.md:1
- Info: Found linked content: SECURITY.md:1
- Info: Found disclosure, vulnerability, and/or timelines in security policy: SECURITY.md:1
- Info: Found text in security policy: SECURITY.md:1
Reason
no binaries found in the repo
Reason
license file detected
Details
- Info: project has a license file: LICENSE.md:0
- Warn: project license file does not contain an FSF or OSI license.
Reason
5 existing vulnerabilities detected
Details
- Warn: Project is vulnerable to: GHSA-rmvr-2pp2-xj38
- Warn: Project is vulnerable to: GHSA-xx4v-prfh-6cgc
- Warn: Project is vulnerable to: GHSA-v6h2-p8h4-qcjw
- Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
- Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
Reason
SAST tool is not run on all commits -- score normalized to 1
Details
- Warn: 2 commits out of 12 are checked with a SAST tool
Reason
Found 0/18 approved changesets -- score normalized to 0
Reason
0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Reason
detected GitHub workflow tokens with excessive permissions
Details
- Warn: jobLevel 'contents' permission set to 'write': .github/workflows/bevry.yml:80
- Warn: no topLevel permission defined: .github/workflows/bevry.yml:1
Reason
dependency not pinned by hash detected -- score normalized to 0
Details
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/bevry.yml:52: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/bevry.yml:54: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/bevry.yml:58: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/bevry.yml:69: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/bevry.yml:74: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/bevry.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/bevry.yml:23: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/bevry.yml:27: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/bevry.yml:39: update your workflow using https://app.stepsecurity.io/secureworkflow/bevry/typechecker/bevry.yml/master?enable=pin
- Info: 0 out of 5 GitHub-owned GitHubAction dependencies pinned
- Info: 0 out of 4 third-party GitHubAction dependencies pinned
Reason
no effort to earn an OpenSSF best practices badge detected
Reason
project is not fuzzed
Details
- Warn: no fuzzer integrations found
Reason
branch protection not enabled on development/release branches
Details
- Warn: branch protection not enabled for branch 'master'
Score
3.6
/10
Last Scanned on 2025-06-23
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