# 🌐 bx - a browser runner

With Node.js, Deno or Bun there are so many JavaScript environments to choose from. However, nothing is as good as the browser environment. `bx` gives you an execution runtime for the browser.

With `bx` you can easily run this script within different browser environments:

```sh
> echo "console.log(navigator.userAgent)" &> script.js
> npx bx ./script.js
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
```

You can easily switch browsers via the `--browserName` parameter:

```sh
> npx bx ./script.js --browserName firefox
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:121.0) Gecko/20100101 Firefox/121.0
```

It even allows you to run `.html` files, e.g. given this file:

```html
<script type="module">
  console.log(document.querySelector('b').textContent);
</script>
<b>Hello World!</b>
```

Running this with `bx` results in:

```sh
> npx bx ./html.html
Hello World!
```

Command line tool to run JavaScript, TypeScript or HTML files in the browser. 

christian-bromann

wdio-user

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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.

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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

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Bin script confusion

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Chronological version anomaly

Project maintainer's SSH key has been compromised.

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Compromised SSH key

(Experimental) Copyleft license information was found

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Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

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Title

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High CVE

Uses debug, reflection and dynamic code execution features.

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Debug access

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Deprecated

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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

Dynamic require can indicate the package is performing dangerous or unsafe dynamic code execution.

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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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Name

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File dependency

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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

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What are GitHub dependencies?

GitHub dependency

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Native code

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High entropy strings

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

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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.

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License change

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What is a license exception?

License exception

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SPDX disjunction

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

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What is known malware?

Known malware

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Manifest confusion

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

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Medium CVE

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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.

What is a non-existent author?

Non-existent author

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What is a missing dependency?

Missing dependency

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

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Missing license

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What is a missing tarball?

Missing package tarball

(Experimental) Package contains multiple licenses.

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Mixed license

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Modified license exception

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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.

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No bug tracker

(Experimental) License information could not be found

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

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No README

Package does not have a linked source code repository. Without this field, a package will have no reference to the location of the source code use to generate the package.

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

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Non OSI license

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

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🌐 bx - a browser runner

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