Awesome JavaScript Micro npm Packages – Massive Collection of Resources

A curated list of small, focused Node.js modules.

Summary:

• Articles
• Modules
  • Array
  • String
  • Date & Time
  • Object
  • Function
  • Math
  • Stream
  • Promise
  • File System
  • Browser
  • Semver
  • CLI
  • Module Management
  • Generators
  • Other

Articles

• One-line node modules
• Build small single purpose modules
• Module best practices
• Evaluating Packages Part 1 – Turn to community
• Evaluating Packages Part 2 – Review repository
• Small modules: it’s not quite that simple
• In Defense of Hyper Modular JavaScript
• Tiny npm package: Guidelines to create a Node.js module following the small package philosophy
• The cost of small modules
• Why I think “micro-packages” are a good thing.

Modules

Array

• is-sorted – A small module to check if an Array is sorted.
• array-first – Get the first element or first n elements of an array.
• array-last – Return the last element in an array.
• arr-flatten – Recursively flatten an array or arrays.
• dedupe – Remove duplicates from an array.
• array-range – Creates a new array with given range.
• arr-diff – Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
• filled-array – Returns an array filled with the specified input
• map-array – Map object keys and values into an array.
• in-array – Return true if any of passed values exists in array – faster than using indexOf.
• unordered-array-remove – Efficiently remove an element from an unordered array without doing a splice.
• array-swap – Swap position of two items in an array.
• mirrarray – Creates a keymirror object from an array of valid keys.
• group-array – Group array of objects into lists.
• array.chunk – Split array/TypedArray to chunks of given size.

String

• decamelize – Convert a camelized string into a lowercased one with a custom separator: unicornRainbow → unicorn_rainbow.
• pad-left – Left pad a string with zeros or a specified string.
• to-camel-case – Convert a string to a camel case.
• to-capital-case – Convert a string to a capital case.
• to-constant-case – Convert a string to a constant case.
• to-dot-case – Convert a string to a dot case.
• to-no-case – Remove an existing case from a string.
• to-pascal-case – Convert a string to a pascal case.
• to-sentence-case – Convert a string to a sentence case.
• to-snake-case – Convert a string to a snake case.
• to-space-case – Convert a string to a space case.
• to-title-case – Convert a string to a title case.
• node-slug – slugifies even utf-8 chars.
• rtrim – Strip whitespace – or other characters – from the end of a string.
• slice.js – Javascript library to engance String.substring / Array.slice with python slice style.
• strip-ansi – Strip ANSI escape codes.
• striptags – An implementation of PHP’s strip_tags in Node.js.
• parse-next-json-value – Parse next JSON value from string allowing extraneous characters after value.

Date & Time

• pretty-ms – Convert milliseconds to a human readable string: 1337000000 → 15d 11h 23m 20s.
• hirestime – A wrapper around the built-in high resolution timer which simplifies the calculation of timestamps.
• periods – Defined time-periods constants for Javascript, in milliseconds.
• fecha – Javascript Date formatting and parsing.
• akamai-time-reference – Get reference time using Akamai’s time reference service.
• timeago.js – A tiny(~1.7kb) library used to format date with *** time ago statement.
• count-days-in-month – Get the number of days in a given month.
• time-stamp – Get a formatted timestamp.
• twas – Generate a relative time string (Example: “3 seconds ago”)

Object

• map-obj – Map object keys and values into a new object.
• filter-obj – Filter object keys and values into a new object.
• object-values – Get the values of an object.
• object-pairs – Turn an object into list of [key, value] pairs for mapping, iterating or other purposes.
• zipmap – Returns a map with the keys mapped to the corresponding vals. zipmap also accepts a single value of objects or pairs.
• just-pluck – Pluck without the madness.
• deep-equal – Node’s assert.deepEqual() algorithm as a standalone module.
• deep-assign – Recursive Object.assign().
• set-value – Create nested values and any intermediaries dot notation ('a.b.c') paths.
• get-value – Use property paths (a.b.c) to get a nested value from an object.
• has-value – Returns true if a value exists, false if empty. Works with deeply nested values using dot notation ('a.b.c') paths.
• has-key-deep – Deep-search objects for keys. Keys can be searched by providing an array of keys, or using a dot-notiation.
• flatkeys – Flatten object key hierarchies into a list of strings using a custom separator.
• flatten-obj – Converts an object literal with deeply nested nodes to a simple key/value object.
• is-empty-object – Check if an object is empty.
• stringify-object – Stringify an object/array like JSON.stringify just without all the double-quotes.
• sorted-object – Returns a copy of an object with its keys sorted.
• static-props – Defines static object attributes using Object.defineProperties
• missing-deep-keys – Returns an array of keys from first object that are missing in second.
• has-own-property – Check if an object has a local property.
• merge-objects – Deep-merge two objects. Arrays that are values of the same object key get concatenated.
• deep-object-diff – Deep diff two JavaScript Objects while preserving the data structure. Including nested structures of Arrays and Objects.

Function

• compose-function – Compose a new function from smaller functions f(g(x)).
• curry – A curry function without anything too clever.
• once – Run a function exactly one time.
• deep-bind – Bind a context to all functions in an object, including deeply nested functions.
• identity-function – Always return the input argument.
• mem – An optimization technique used to speed up consecutive function calls by caching the result of calls with identical input.
• throttle-debounce – Throttle/debounce your functions.
• compose-tiny – A very tiny and fast compose function.

Math

• is-even – A good way to tell if a number is even or not (avoids type issues). Uses is-odd and is-number under the hood.
• is-number – Returns true if the value is a number.
• is-odd – A good way to tell if a number is odd or not (avoids type issues). Uses is-number under the hood.
• easy-math.js – A tiny easy math library including addition, multiplication, subtraction, and division.
• my-prime – A good way to tell if a number is prime or not.
• fun-gcd – A tiny math library to get gcd of two numbers using Euclidean algorithm

Stream

• through2 – Tiny wrapper around Node streams2 Transform to avoid explicit subclassing noise.
• through2-filter – A through2 to create an Array.prototype.filter analog for streams.
• through2-map – A through2 to create an Array.prototype.map analog for streams.
• stream-spigot – A readable stream generator, useful for testing or converting simple functions into Readable streams.
• concat-stream – writable stream that concatenates strings or data and calls a callback with the result.
• JSONStream – streaming JSON.parse and stringify
• through2-map-promise – A small promise-based wrapper for through2.
• pump – pipe streams together and close all of them if one of them closes.
• split – Break up a stream and reassemble it so that each line is a chunk.
• is-stream – Check if something is a Node.js stream.
• syncthrough – Transform your data as it pass by, synchronously.

Promise

• pify – Promisify a callback-style function.
• promise-all-props – Like Promise.all but for object properties.
• sleep-promise – Resolves a promise after a specified delay.
• is-promise – Test whether an object looks like a promises-a+ promise.

File System

• rimraf – A deep deletion module for node (like rm -rf).
• mkdirp – Recursively mkdir, like mkdir -p.
• du – A simple JavaScript implementation of du -sb.
• file-size – Lightweight filesize to human-readable / proportions w/o dependencies.
• tmp – Temporary file and directory creator for node.js.
• fs-promise – Node fs methods as Promise/A+ (optional fs-extra, graceful-fs).
• read-git-user – Reads the username and email from .gitconfig 🔧 and returns it as json object.

Browser

• delegate – Lightweight event delegation.
• insert-css – Insert a string of css into the head
• dom-element-value – DOM element value getter/setter.
• image-promise – Load one or more <img>s in a Promise.
• get-media-size – Get the original size of any img/video/svg/canvas tags or canvas context.
• document-ready – Document ready listener for modern browsers.
• copee – Copy text from browser to clipboard…natively!

Semver

• semver – The semantic version parser used by npm.
• semver-max – Find maximum (or minimum) version according to semver.
• semver-first-satisfied – Find minimum in an array of version that satisfies a semver range.

CLI

• abbrev – Calculate the set of unique abbreviations for a given set of strings.
• glob – Glob functionality for node.js.
• username – Get the username of the current user.
• minimist – Parse argument options.
• png-to-ico – Convert png to windows ico format.
• help-version – Easily handle –help and –version arguments in your CLI application

Module management

• pkg-conf – Get namespaced config from the closest package.json.
• normalize-pkg – Normalize values in package.json to improve compatibility, programmatic readability and usefulness with third party libs.

Generators

• is-generator – Check whether a given value is a generator function.

Other

• uuid – Generate RFC-compliant UUIDs in JavaScript.
• node-mime – Comprehensive MIME type mapping API based on mime-db module.
• not-defined – Checks if foo is not defined, i.e. undefined, null, an empty string, array or object.
• is-fqdn – Check if a string represent a fully qualified domain name.
• shurley – Parses URLs from user input (with potential typos in protocols, bad copy+paste, etc.) and returns a proper URL.
• mime-type-check – Get the MIME type of a file by its extension.