# Safety First

Safe nested lookups with simple tagged template syntax

[![npm version](https://img.shields.io/npm/v/safetyfirst.svg?style=flat-square)](https://www.npmjs.com/package/safetyfirst)

This library aims to enable safe nested lookups in manner similar to lodash/get 
and other such libraries but uses [Tagged template literals](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#Tagged_template_literals)
to provide an alternate syntax. 

# Usage

```js
// use whatever alias you like
const g = require('safetyfirst');

const target = {
    foo: {
        bar: {
            baz: 'quux'
            corge: ['grault']
        }
    }
};

// mirrors basic lookup functionality
g`${target}.foo.bar.baz` === 'quux'
g`${target}[foo].bar.baz` === 'quux'
g`${target}['foo'].bar.baz` === 'quux'

// normally target.waldo.fred would have thrown an error
g`${target}.waldo.fred` === undefined

// interpolation 
const bar = 'bar';
g`${target}.foo.${bar}.baz` === 'quux'
g`${target}.foo[${bar}].baz` === 'quux'

// array lookups
g`${target}.foo.bar.corge[0]` === 'grault'
```

Safe nested lookups utilising tagged template literals functionality. 

Malicious Chrome Extension Performs Hidden Affiliate Hijacking

safetyfirst

Safe nested lookups utilising tagged template literals functionality

jordrake

(Experimental) An ambiguous license classifier was found.

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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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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.

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Chrome: Host Permission

This Chrome extension requests permissions to access browser APIs, user data, or system features.

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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

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Chronological version anomaly

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Compromised SSH key

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Possible typosquat attack

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Dynamic require

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Empty package

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File dependency

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Filesystem access

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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.

GitHub Actions: Input argument flows to dangerous sink

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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Git dependency

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GitHub dependency

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AI-detected potential code anomaly

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AI-detected potential malware

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Native code

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High entropy strings

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Unicode homoglyphs

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HTTP dependency

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Install scripts

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Invalid manifest file

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Invisible chars

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Modified license exception

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