# pre-visit

Utility function to visit all or some nodes of a generic tree, where children of a node are found in the `children` property. A visitor is applied before visiting the children and siblings, hence it is calle `pre-visit`.

Besides a visitor you can provide a predicate to filter nodes.

It works fine with all kinds of trees, I use it mainly as a typed and more feature rich replacement to `unist-util-visit` to visit remark trees.

## Content

- [Content](#content)
- [What is this?](#what-is-this)
- [When should I use this?](#when-should-i-use-this)
- [Install](#install)
- [Use](#use)

## What is this?

This package provides a fully typed utility to visit trees and apply a visitor before visiting other nodes.

## When should I use this?

If you want to work with trees and even be able to transform them, while visiting.

## Install

This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).
In Node.js (version 12.20+, 14.14+, or 16.0+), install with `npm`:

```sh
npm install pre-visit
```

## Use

This is still in very early alpha, hence, I can only provide very little documentation.

Use at your own risk.


Fully typed utility to visit trees and apply a visitor before visiting other nodes. 

Supply Chain Attack on Axios Pulls Malicious Dependency from npm

pre-visit

Fully typed utility to visit trees and apply a visitor before visiting other nodes

shackhacker-christian

An ambiguous license classifier was found.

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Ambiguous License Classifier

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Bad text encoding

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Bad semver

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Bad dependency semver

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Bidirectional unicode control characters

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What is bin script confusion?

Bin script confusion

This Chrome extension includes content scripts that execute JavaScript on specified websites.

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Chrome: Content Script

This Chrome extension requests host permissions to access specific websites or domains.

What are Chrome extension host permissions?

Chrome: Host Permission

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Chrome: Permission

This Chrome extension requests wildcard host permissions that grant broad access to websites.

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Chrome: Wildcard Host Permission

Semantic versions published out of chronological order.

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Chronological version anomaly

Project maintainer's SSH key has been compromised.

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Compromised SSH key

What do I need to know about license files?

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 SPDX exception

License is deprecated which may have legal implications regarding the package's use.

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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

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Empty package

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Name

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File dependency

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Filesystem access

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Wildcard dependency

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GitHub Actions: Input argument exported as environment variable

An input argument to this GitHub Action is being passed back as an output. If a user of this action passes untrusted input, it could be used in an insecure manner by consuming workflows.

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An input argument to this GitHub Action flows into a dangerous sink (such as shell command execution). This could allow a malicious user to inject commands or exploit the action.

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A GitHub context variable (such as issue title, PR description, or comment body) is being exported as an environment variable. These context values are user-controlled and could be exploited by subsequent workflow steps.

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A GitHub context variable (such as issue title, PR description, or comment body) flows into a dangerous sink (such as shell command execution). This is a critical security issue that could allow command injection or code execution attacks.

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GitHub Actions: Environment variable flows to dangerous sink

Contains a dependency which resolves to a remote git URL. Dependencies fetched from git URLs are not immutable and 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

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What is an AI-detected potential code anomaly?

AI-detected potential code anomaly

AI has identified this package as a potential typosquat of a more popular package. This suggests that the package may be intentionally mimicking another package's name, description, or other metadata.

What is AI-detected potential typosquatting?

AI-detected possible typosquat

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

AI has determined that this package may contain potential security issues or vulnerabilities.

What are AI-detected potential security risks?

AI-detected potential security risk

Contains native code (e.g., compiled binaries or shared libraries). Including native code can obscure malicious behavior.

Why is native code a concern?

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 or built. Malicious packages often use scripts that run automatically to execute payloads or fetch additional code.

What is an install script?

Install scripts

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

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Invalid manifest file

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

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Invisible chars

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License change

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License exception

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Long strings

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Major refactor

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Known malware

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Manifest confusion

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Medium CVE

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Minified code

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Misc. License Issues

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Non-existent author

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Missing dependency

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Missing license

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What is a missing tarball?

Missing package tarball

What is a mixed license?

Mixed license

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

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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.

pre-visit

pre-visit

Content

What is this?

When should I use this?

Install

Use

Keywords

Related posts

pre-visit

pre-visit

Content

What is this?

When should I use this?

Install

Use

Keywords

Related posts

Axios Maintainer Confirms Social Engineering Attack Behind npm Compromise

Node.js Drops Bug Bounty Rewards After Funding Dries Up