the definitive JavaScript type testing library. 

the definitive JavaScript type testing library

ljharb

enricomarino

onirame

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Ambiguous License Classifier

Source files are encoded using a non-standard text encoding.

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Bad text encoding

Package version is not a valid semantic version (semver).

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Bad semver

Package has dependencies with an invalid semantic version. This could be a sign of beta, low quality, or unmaintained dependencies.

What is bad dependency semver?

Bad dependency semver

Source files contain bidirectional unicode control characters. This could indicate a Trojan source supply chain attack. See: trojansource.codes for more information.

What are bidirectional unicode control characters?

Bidirectional unicode control characters

This package has multiple bin scripts with the same name.  This can cause non-deterministic behavior when installing or could be a sign of a supply chain attack

What is bin script confusion?

Bin script confusion

Semantic versions published out of chronological order.

What is a chronological version anomaly?

Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

(Experimental) Copyleft license information was found

What do I need to know about license files?

Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

What is a critical CVE?

Title

Critical CVE

Contains a high severity Common Vulnerability and Exposure (CVE).

What is a CVE?

High CVE

Uses debug, reflection and dynamic code execution features.

What is debug access?

Debug access

The maintainer of the package marked it as deprecated. This could indicate that a single version should not be used, or that the package is no longer maintained and any new vulnerabilities will not be fixed.

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Deprecated

(Experimental) Contains a known deprecated SPDX license exception.

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Deprecated SPDX exception

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Deprecated license

Package name is similar to other popular packages and may not be the package you want.

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Possible typosquat attack

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Dynamic require

Package does not contain any code. It may be removed, is name squatting, or the result of a faulty package publish.

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Empty package

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Environment variable access

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What are extraneous dependencies?

Name

Extraneous dependency

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File dependency

Accesses the file system, and could potentially read sensitive data.

What is filesystem access?

Filesystem access

Package has a dependency with a floating version range.  This can cause issues if the dependency publishes a new major version.

What are floating dependencies?

Floating dependency

Contains a dependency which resolves to a remote git URL. Dependencies fetched from git URLs are not immutable can be used to inject untrusted code or reduce the likelihood of a reproducible install.

What are git dependencies?

Git dependency

Contains a dependency which resolves to a GitHub URL. Dependencies fetched from GitHub specifiers are not immutable can be used to inject untrusted code or reduce the likelihood of a reproducible install.

What are GitHub dependencies?

GitHub dependency

AI has identified unusual behaviors that may pose a security risk.

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AI detected anomaly

AI has identified this package as malware. This is a strong signal that the package may be malicious.

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AI detected potential malware

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AI detected security risk

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What's wrong with native code?

Native code

Contains high entropy strings. This could be a sign of encrypted data, leaked secrets or obfuscated code.

What are high entropy strings?

High entropy strings

Contains unicode homoglyphs which can be used in supply chain confusion attacks.

What are unicode homoglyphs?

Unicode homoglyphs

Contains a dependency which resolves to a remote HTTP URL which could be used to inject untrusted code and reduce overall package reliability.

What are http dependencies?

HTTP dependency

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

What is an install script?

Install scripts

Package has an invalid manifest file and can cause installation problems if you try to use it.

What is an invalid manifest file?

Invalid manifest file

Source files contain invisible characters. This could indicate source obfuscation or a supply chain attack.

What are invisible characters?

Invisible chars

(Experimental) Package license has recently changed.

What is a license change?

License change

(Experimental) Contains an SPDX license exception.

What is a license exception?

License exception

spdx disjunction for an artifact's license information

Contains long string literals, which may be a sign of obfuscated or packed code.

What's wrong with long strings?

Long strings

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

What is a major refactor?

Major refactor

This package is malware. We have asked the package registry to remove it.

What is known malware?

Known malware

This package has inconsistent metadata. This could be malicious or caused by an error when publishing the package.

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Manifest confusion

Contains a medium severity Common Vulnerability and Exposure (CVE).

What is a medium CVE?

Medium CVE

Contains a low severity Common Vulnerability and Exposure (CVE).

What is a mild CVE?

Low CVE

This package contains minified code.  This may be harmless in some cases where minified code is included in packaged libraries, however packages on npm should not minify code.

What's wrong with minified code?

Minified code

(Experimental) A package's licensing information has fine-grained problems

Nonpermissive License

The package was published by an npm account that no longer exists.

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Non-existent author

A required dependency is not declared in package.json and may prevent the package from working.

What is a missing dependency?

Missing dependency

(Experimental) Package does not have a license and consumption legal status is unknown.

What is a missing license?

Missing license

This package is missing it's tarball.  It could be removed from the npm registry or there may have been an error when publishing.

What is a missing tarball?

Missing package tarball

(Experimental) Package contains multiple licenses.

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Mixed license

(Experimental) Package contains a modified version of an SPDX license exception.  Please read carefully before using this code.

What is a modified license exception?

Modified license exception

(Experimental) Package contains a modified version of an SPDX license.  Please read carefully before using this code.

What is a modified license?

Modified license

What is network access?

Network access

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

What is new author?

New author

Package does not specify a list of contributors or an author in package.json.

Why is contributor and author data important?

No contributors or author data

Package does not have a linked bug tracker in package.json.

Why are bug trackers important?

No bug tracker

(Experimental) License information could not be found

No License Found

Package does not have a README. This may indicate a failed publish or a low quality package.

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No README

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Why are missing repositories important?

No repository

Package does not have any tests. This is a strong signal of a poorly maintained or low quality package.

What does no tests mean?

No tests

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

What is wrong with semver < v1?

No v1

What is a missing website?

No website

(Experimental) Package has a non-FSF-approved license.

What is a non FSF license?

Non FSF license

(Experimental) Package has a non-OSI-approved license.

What is a non OSI license?

Non OSI license

(Experimental) Package contains a non-standard license somewhere. Please read carefully before using.

		{
		"name": "is",
		"author": {
		"name": "Enrico Marino",
		"url": "http://onirame.com"
		},
		"description": "the definitive JavaScript type testing library",
		"homepage": "https://github.com/onirame/is",
		"homepage": "https://github.com/enricomarino/is",
		"keywords": [
		"util",
		"test",
		"type",
		"sniff",
		"server",
		"client",
		"browser"
		"test"
		],
		"author": "Enrico Marino <enrico.marino@email.com> (http://onirame.no.de)",
		"contributors": [],
		@@ -19,6 +18,6 @@ "dependencies": {},
		"type": "git",
		"url": "git://github.com/onirame/is.git"
		"url": "git://github.com/enricomarino/is.git"
		},
		"main": "is.js",
		"version": "0.1.5",
		"main": "index.js",
		"version": "0.1.6",
		"devDependencies": {},
		@@ -25,0 +24,0 @@ "engines": {

		# is

		the definitive JavaScript type testing library
		The definitive JavaScript type testing library

		To be or not to be? This is the library!

		## Installation

		As a node.js module

		$ npm install is

		As a component

		$ component install enricomarino/is

		## API
		@@ -82,6 +92,3 @@

		## Installation

		$ npm install is

		## License
		@@ -91,3 +98,3 @@

		Copyright (c) 2011 Enrico Marino <enrico.marino@email.com>
		Copyright (c) 2013 Enrico Marino

		@@ -111,2 +118,2 @@ Permission is hereby granted, free of charge, to any person obtaining
		TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
		SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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