One-line node modules

Full-time open-sourcerer. Maker of many npm packages and apps.

Module best practices

Some good practices when writing new npm modules.

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

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.

fast-cartesian

Fast cartesian product.

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 enhance 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.

pluralize

A very tiny library to pluralize words

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")

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.

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.

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

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.

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.

quetie

Just the cutest and tiniest queue/deque implementation!

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 :wrench: and returns it as json object.

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

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.

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

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.

is-generator

Check whether a given value is a generator function.

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.

nanoid

A tiny (130 bytes), secure, URL-friendly, unique string ID generator for JavaScript

npm-deprecated-check

Check for deprecated packages and recommend alternative packages.

Sindre Sorhus

James Halliday

Rod Vagg

Max Ogden