Jon Schlinkert

Smarter YAML front matter parser, used by metalsmith, Gatsby, Netlify, Assemble, mapbox-gl, phenomic, vuejs vitepress, TinaCMS, Shopify Polaris, Ant Design, Astro, hashicorp, garden, slidev, saber, sourcegraph, and many others. Simple to use, and battle tested. Parses YAML by default but can also parse JSON Front Matter, Coffee Front Matter, TOML Front Matter, and has support for custom parsers. Please follow gray-matter's author: https://github.com/jonschlinkert

Markdown parser, done right. Commonmark support, extensions, syntax plugins, high speed - all in one. Gulp and metalsmith plugins available. Used by Facebook, Docusaurus and many others! Use https://github.com/breakdance/breakdance for HTML-to-markdown conversion. Use https://github.com/jonschlinkert/markdown-toc to generate a table of contents.

Don't let the trolls get you down! Use this as a reference to avoid open-source burnout and keep doing what you love: writing code! Contributions and any kind of improvements are very welcome!

API and CLI for generating a markdown TOC (table of contents) for a README or any markdown files. Uses Remarkable to parse markdown. Used by NASA/openmct, Prisma, Joi, Mocha, Sass, Prettier, Orbit DB, FormatJS, Raneto, hapijs/code, webpack-flow, docusaurus, release-it, ts-loader, json-server, reactfire, bunyan, husky, react-easy-state, react-snap, chakra-ui, carbon, alfresco, repolinter, Assemble, Verb, and thousands of other projects.

Minify HTML

Top 100 Sublime Text plugin! Markdown syntax highlighter for Sublime Text, with extended support for GFM fenced code blocks, with language-specific syntax highlighting. YAML Front Matter. Works with ST2/ST3. Goes great with Assemble.

Extends Monokai from Soda with additional syntax highlighting for Markdown, LESS, HTML, Handlebars and more.

Get the native JavaScript type of a value, fast. Used by superstruct, micromatch and many others!

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives. Used by superstruct, merge-deep, and many others!

Use property paths (`a.b.c`) get a nested value from an object.

JavaScript/Node.js utility. Returns `true` if the value is a number or string number. Useful for checking regex match results, user input, parsed strings, etc.

Set nested properties on an object using dot-notation.

Wrap words to a specified length.

Easily generate random strings like passwords, with simple options for specifying a length and for using patterns of numeric, alpha-numeric, alphabetical, special or custom characters. (the original "generate-password")

Easily get, set and persist config data. Fast. Supports dot-notation in keys. No dependencies.

Returns true if the given value is an object created by the Object constructor.

If you're looking for ways to stay motivated and focused, while still having fun, this guide is for you! Contributions and any kind of improvements are very welcome!

Sensible presets and some tweaks for beautifying HTML with js-beautify according to my preferences.

Parse a Github URL into an object. Supports a wide variety of GitHub URL formats.

A brief guide to being an effective open source contributor.

Strip block comments or line comments from JavaScript code.

Normalize file path slashes to be unix-like forward slashes. Used by chokidar, anymatch, and many others!

Recursively merge values in a JavaScript object.

Get a formatted timestamp. Used in gulp, assemble, generate, and many others.

Is the value an object, and not an array or null?

Methods for working with the GitHub Gist API. Node.js/JavaScript

Copy files using glob patterns. Sync, async, promise or streams. (node.js utility)

Get the current branch for a local git repository

Convert a string to a dash-separated string (kebab case). Works with camelcase, pascalcase, space-separated, etc.

Put some typographical vertical rhythm in your CSS. LESS, Stylus and SCSS/SASS versions included.

Reliable way to to get the height and width of the terminal/console in a node.js environment.

Write data to the file system, creating any intermediate directories if they don't already exist. Used by flat-cache and many others!

Dry is a new template engine and language, and is a superset of Shopify's Liquid, with first-class support for advanced inheritance features, and more. From the creators of Enquirer, Assemble, Remarkable, and Micromatch.

Deeply mix the properties of objects into the first object, while also mixing-in child objects.

Generic JavaScript helpers that can be used with any template engine. Handlebars, Lo-Dash, Underscore, or any engine that supports helper functions.

Recursively omit specified keys from an object.

Deeply assign the enumerable properties of source objects to a destination object.

Return a copy of an object without the given keys.

Fast and powerful array sorting. Sort an array of objects by one or more properties. Any number of nested properties or custom comparison functions may be used.

Grunt plugin for beautifying HTML. Lots of options so that you can format/beautify the generated HTML the way you want it.

Recursively omit empty properties from an object. Omits empty objects, arrays, strings, and optionally zero. Similar results to what you would expect with `compact` for arrays.

Safely evaluate JavaScript (estree) expressions, sync and async.

Parse a gitignore file into an array of patterns. Comments and empty lines are stripped.

Parse JavaScript code comments. Works with block and line comments, and should work with CSS, LESS, SASS, or any language with the same comment formats.

Parse `.git/config` into a JavaScript object. sync or async.

Grunt tasks for re-factoring code.

Split a string on a given character or characters, with support for escaping.

Fast, generic JavaScript/node.js utility functions.

Fill in a range of numbers or letters, positive or negative, optionally passing an increment or multiplier to use.

Generate a regex from a string or array of strings.

Simple, opinionated node.js interface for creating basic apps with the GitHub API.

System for creating and managing view collections, rendering, engines, routes and more. See the "dev" branch for most recent updates.

Recursively flatten an array or arrays. This is the fastest implementation of array flatten.

Return an array free of duplicate values. Very fast implementation.

Basic object store with methods like get/set/extend/omit

Swig template syntax highlighting for Sublime Text.

Easily format the time from node.js `process.hrtime`. Works with timescales ranging from weeks to nanoseconds.

Prettify HTML.

Align the text in a string.

Calculate an exponential moving average from an array of numbers.

Add context awareness to your apps and frameworks by safely evaluating user-defined conditional expressions. Useful for evaluating expressions in config files, prompts, key bindings, completions, templates, and many other user cases.

Extract JavaScript code comments from a string or glob of files.

Repeat the given string n times. Fastest implementation for repeating a string (2x faster than the native method)

Returns true if the platform is Windows (and Cygwin or MSYS/MinGW for unit tests)

Recursively delete all empty folders in a directory and child directories.

Capture screenshots programmatically. Cross-platform, with support for MacOS (Darwin), Windows, and Linux.

Returns an array with only the unique values from all given arrays using strict equality for comparisons.

Left pad a string with zeros or a specified string. Fastest implementation.

Convert a windows file path to a unix-style file path.

Custom delimiters, for Handlebars templates.

Memoize the results of a call to the RegExp constructor, avoiding repetitious runtime compilation of the same string and options, resulting in dramatic speed improvements.

Regex to validate that a URL is a git URL.

Convert a string to pascal case (upper camel case). Used by more than 8.7 million projects on GitHub! Please follow this library's author: https://github.com/jonschlinkert

Is the typeof value a javascript primitive?

Iterate over the enumerable properties of an object, and return an object with properties that evaluate to true from the callback. Exit early by returning `false`.

Delete nested properties from an object using dot notation.

Generalized file and path utils for Node.js projects.

Return the last element in an array. Faster than `.slice`

Easily calculate the relative path from file A to file B in Node.js project. Will calculate correctly from a file to a directory, file to file, directory to file, and directory to directory.

Extend object A with the properties of object B. node.js/javascript util.

Parse a filepath and return an object of path parts. Falls back on native node.js `path.parse` if it exists

Make a shallow clone of an object, array or primitive.

Get the length of the longest item in an array.

Get the npm global path prefix. Same code used internally by npm.

Wrap, align and justify the words in a string.

Convert plain text into snippets of markdown.

Filter an object using glob patterns and dot notation.

Extends `stats.isDirectory()`, returns `true` if a filepath is a directory.

Expand a string into a JavaScript object using a simple notation.

Very thin wrapper around js-yaml for directly reading in YAML files.

Glob matching with support for multiple patterns and negation. Use `~` in cwd to find files in user home, or `@` for global npm modules.

Pull down a list of GitHub repos for the given user or org, and save to a local JSON file.

Empower your text editor or prompt with full-featured code snippets! JavaScript library and API for parsing, compiling, and rendering code snippets, with complete support for VS Code-style tabstops. Supports variables, placeholders, transforms, unlimited nesting, and all of the "snippet" features offered by popular text editors like VSCode, Atom, TextMate and Sublime Text.

Like `extend` but recursively copies only the missing properties/values to the target object.

Basic logging utils: colors, symbols and timestamp.

Returns an array of unique values using strict equality for comparisons, maintaining the same order as the provided arrays.

Bash-like tilde expansion for node.js. Expands a leading tilde in a file path to the user home directory, or `~+` to the cwd.

Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation. Node.js/JavaScript util.

Convert liquid templates to handlebars templates!

Get the repository name from the git remote origin URL

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Center-align the text in a string.

Iterate over the own enumerable properties of an object, and return an object with properties that evaluate to true from the callback. Exit early by returning `false`.

Parse a person, author, contributor or maintainer string into an object with name, email and url properties following NPM conventions. Useful for the `authors` property in package.json or for parsing an AUTHORS file into an array of person objects.

Plugin for prettifying markdown with https://github.com/jonschlinkert/remarkable using custom renderer rules.

Like front-matter, but allows multiple sections in a single document.

When copying or moving files, it's common for operating systems to automatically add an increment or 'copy' to duplicate file names. This does that for Node.js applications, with automatic platform detection and support for Linux, MacOs, and Windows conventions.

Call the given method on each value in the given object.

Get the name of the current user from git config, at the project or global scope, depending on what git uses in the current context.

Extract gfm (GitHub Flavored Markdown) fenced code blocks from a string.

Get the GitHub repository URL from a NPM package name.

Lo-dash's array-clice method. Slices `array` from the `start` index up to, but not including, the `end` index.

The color gray, in ansi.

Convert arabic numbers to roman numerals (useful for books, outlines, documentation, slide decks, etc)

Expand deeply nested values from an object, with support for advanced features

A high-performance wrapper around Intl.Segmenter for efficient text segmentation. This class resolves memory handling issues seen with large strings and "maximum call stack exceeded" exceptions that occur when strings exceed 40-50k characters. Enhances performance by 50-500x. Only ~70 loc (with comments) and no dependencies.

Generate a readme from a template and package.json data. If you need something more comprehensive, I recommend using Verb.

Visit a method over the items in an object, or map visit over the objects in an array. This is an alternative approach to using extend or merge, useful when events are emitted on a method like get or set.

Enhanced monokai theme, for Hyper.

Create ansi colors by passing open and close codes.

Create an array by repeating the given string n times.

Generate HTML tags from an object.

Use "cw" in the CLI. No instructions necessary, just hit <enter>. Can also be used as a library. Commit Whisperer is an AI genius for generating meaningful git commit messages from repository state and user instructions.

API and CLI for getting the stars for one or more GitHub users or organizations.

Alternative to Lo-Dash template with support for helpers.

Detects the casing of the input string (camelcase, lowercase, snakecase, kebabcase, snakecase, uppercase etc).

Generate a unique sequential ID. Optionally pass a prefix, suffix, or multiplier.

Get the language associated with a file extension or the extensions associated with a language using the data from GitHub's Linguist and language-map.

Currently the English alphabet, upper and lowercase, but open to PRs for other languages. (This was originally published to teach someone how NPM works.)

Map `visit` over an array of objects.

Extract the username from a git remote origin URL.

Like `extend` but only copies missing properties/values to the target object.

Map of more than 1,200 diacritics and ligatures to english alphabet equivalents.

Updated list of the 100 most common words in the English language. Useful for excluding these words from arrays.

Copy to the clipboard.

Loop over each item in an array and call the given function on every element.

Faster, node.js focused alternative to JavaScript's native array map.

Use Assemble to create a blog from GitHub Gists! Consider this an example of how to get started with Assemble.

Get the line number for each regex match found in a string.

Copy static properties, prototype properties, and descriptors from one object to another

Resolve values based on a JSON schema. Supports conditionals and composition. Useful for configuration, preferences, LLM chat completions, etc.

Return true if the file is (or the file path has) a dotfile.

Uses snapdragon to tokenize a single JavaScript block comment into an object, with description, tags, and code example sections that can be passed to any other comment parsers for further parsing.

Resolve the path to the user's global .gitconfig.

Detect the terminal program currently being used, with support for iTerm, Terminal.app, Hyper, iTerm2, ConEmu, Cmde,r Alacritty, Xterm, Terminator, Termux, Kitty, and others. Detection is based on environment variables and process-level indicators to identify the terminal in use.

Get the current user's git email address.

Get and set options easily, for node.js projects.

Get the current working directory relative to the calling module.

Returns true if a windows file path does not contain any invalid characters.

Customized monokai theme for iterm. There are others, this one is based on https://github.com/jonschlinkert/sublime-monokai-extended

Generator for creating Yeoman generators that are capable of remembering certain user answers, resulting in a better user experience. Run `yo base` and create your own generator, with the basic necessities including docs.

Cross-platform utility to open a file or directory in the system's default file manager (Finder, Explorer, Nautilus, etc.)

Light weight JSON Schema $ref resolver. Expands a JSON Schema by resolving `$ref` references from a mapping of definitions. Does not handle remote references. Has comprehensive unit tests and no dependencies.

Adds a static `extend` method to a class, to simplify inheritance. Extends the static properties, prototype properties, and descriptors from a `Parent` constructor onto `Child` constructors.

Open a finder dialog window (finder prompt) programmatically.

CLI and API to get a single file from Github repository.

Returns `true` if the value of an object's property is strictly true, or it's inverse is false.

Get the resolved path to the root of a package installed in node_modules

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

Print regular expressions with syntax highlighting in the terminal. Useful for debugging, visually inspecting and understanding complex regex patterns.

Load the package.json in the base of the user's current project.

Operating systems commonly add a trailing increment, or the word 'copy', or something similar to duplicate files. This strips those increments. Tested on Windows, MacOS, and Linux.

Node.js API for the bash(1) 'compgen' built-in, which lists all available bash commands, aliases, keywords, functions...

Return an array with the unique values present in _all_ given arrays using strict equality for comparisons.

Get the value of a specified property from all elements in a collection.

Bind a context to all functions in an object, including deeply nested functions.

Add a banner to a string. Banners are just Lo-Dash/underscore templates, if a custom one isn't defined a default will be used.

Array of all standard HTML and HTML5 elements.

No description.

Programmatically open a file dialog window (explorer) for picking files. Only works on Windows. Also see: open-finder-dialog, open-linux-file-dialog, and open-file-manager-dialog for other platforms.

Strip a byte order mark (BOM) from a string.

Reserved words that may not be used as variables, functions, methods, or object identifiers, since ECMAScript specifies special behavior for them.

The color red, in ansi.

The color cyan, in ansi.

The Model Context Grammar Protocol defines a simple, extensible, and non-deterministic grammar for specifying valid message types and their arrangements in exchanges with language models. This protocol enables precise, unambiguous specification of interactions including multimodal content, tool calls, and flexible message sequencing.

Get publicly available information about an organization, or for all organizations for one or more users, from the GitHub API.

HTML void elements are not the only self-closing tags. This includes common SVG self-closing elements as well.

Omit properties from an object or deeply nested property of an object using object path notation.

Get a tree from a GitHub repository.

Returns true if a windows file path has invalid characters.

Handlebars engine, consolidate.js style but with enhancements. This works with Assemble, express.js, engine-cache or any application that follows consolidate.js conventions.

Open a file dialog window programmatically to allow the user to select one or more files. Only works on Linux. No dependencies. Supports zenity (GNOME), kdialog (KDE), yad (Yet Another Dialog), qarma (Qt-based), matedialog (MATE), rofi (window switcher with file browser mode), fzf (terminal fuzzy finder), dmenu (dynamic menu).

Get the odd numbered items from an array. This package was created as a learning experience as I'm learning how to program.

Collapse an object into a string using the syntax from expand-object. Useful for setting command line args or with test fixtures.

Node.js support for OpenZL, an open source data compression framework from Meta that offers lossless compression for structured data, designed to provide the performance of format-specific compressors with the ease of maintaining a single executable binary.

Map single letter abbreviations to javascript native types. Useful as a shorthand for pseudo-argument destructuring when debugging.

Application examples for Template, and other node.js setups.

Build AI-powered applications with React, Svelte, Vue, and Solid

WIP NOT READY FOR USE! Git-backed file storage and versioning, with i18n support

Generate reference links for a glob of markdown files, allowing you to more easily create references from one file to another.

Make lo-dash/underscore template errors easy to understand and fix.

Parse string values in package.json into objects.

Make a NPM package name safe to be used as a JavaScript variable name. Works well as a mixin in Yeoman generators.

Get the width and height of a video or image.

Replace only specific occurrences of a string. e.g. if the string exists 10 times, you can replace, say, the 3rd and 8th occurrences only, etc. Returns a new string with nth specific matches of a pattern replaced by a replacement. The pattern can be a string or a RegExp, and the replacement can be a string or a function to be called for each match.

JSON schema reference resolver

Cross-platform library for opening a file manager dialog window programmatically on MacOS, Windows, or Linux.

Get the width and height of a video.

Bug fix for eta

My default community health files