JSPM

Get the native type of a value.

Ensure a function is only called once

Implementation of Function.prototype.bind

Get callsites from the V8 stack trace API

Reuse objects and functions with style

Run a function exactly one time

Robustly `.call.bind()` a function

Matches strings against configurable strings, globs, regular expressions, and/or functions

Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.

`Start a promise chain

Get the path of the parent module

Run an array of functions in parallel

Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.

Determine if a function is a native generator function.

Set a function's length property

Define a lazily evaluated property on an object

Returns true if a value is a plain object, array or function.

An ES2015 spec-compliant `Function.prototype.name` shim

Does this JS environment support the `name` property on functions?

Set a function's name property

two functions: One that returns true, one that returns false

Check if something is a generator function

Determine if a function is a native async function.

Create a promise that can be canceled

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

A function that returns the normally hidden `AsyncFunction` constructor

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

Make a function mimic another one

Visit a method over the items in an object, or map visit over the objects in an array.

Run the supplied function exactly one time (once)

Extract names from functions

Delay function calls until a set time elapses after the last invocation

Throttle a function to limit its execution rate

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

Map `visit` over an array of objects.

Get the path of the caller function

Isomorphic, functional type-checking for Javascript

Get the callsite of the caller function

Automatically bind methods to their class instance

Module that helps you write generated functions in Node

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

Normalize a value or function, applying extra args to the function

Universal Children Definition for React Components

JSS plugin for function value and rule syntax

Set the length of a function.

No-dependencies, low-level, high-performance JIT code generation package for JavaScript

Run an array of functions in series

Capture and retrieve the last time a function was run

Reduce function calls in a string, using a callback

Use the gray() color function in CSS

Make a synchronous function have a timeout

Validates if a value is a function.

Run promise-returning & async functions concurrently with optional limited concurrency

Type checking for JavaScript functions

Debounce a function

Run an array of functions in parallel, but limit the number of tasks executing at the same time

Memoize promise-returning & async functions

Compose new functions f(g(x))

Wraps a function with a function of a sertain arity.

Sort the keys in an object.

Monkey-patch (hook) functions for debugging and stuff.

Memoize functions - An optimization used to speed up consecutive function calls by caching the result of calls with identical input

Mathematical expression evaluator

Get the name of a named function

Check whether a value is a generator or generator function

Node.js test runner that lets you develop with confidence.

chain a bunch of functions together into a single call

return a curried function

Return a function which tests if every element in an array passes a test condition.

Return a regular expression to capture a function name.

Return a double-precision floating-point number with the magnitude of x and the sign of y.

Test if a value is a function.

check if an AST node is a function of some sort

TypeScript implementation of debounce

Function which does nothing.

Fork a stream in multiple directions according to a function

Get the arguments of a function, arrow function, generator function, async function

Inspects a function and returns informations about it (e.g. name, parameters names, parameters and default values, signature)

Inspects function's parameters declaration and returns information about it (e.g. names, default values, if needs destructuring, destructured parameters names and default values)

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Check if function is an ES6 class.

PostCSS plugin for exposing JavaScript functions

Wrap a function without changing its name and other properties

A string template tag to strip leading indents from your heredoc-style multi-line strings

A parser and converter for Tab Atkins's proposed color function in CSS.

Parse a function into an object using espree, acorn or babylon parsers. Extensible through Smart Plugins

Specify properties for which a variable, function, keyword or value must be used

PostCSS plugin to transform W3C CSS color function to more compatible CSS.

Provides a list of reserved identifiers for JavaScript

Allows you to bannish some methods or functions.

Fast kernel density estimation library

Converts function to its source code.

Create a lazy promise that defers execution until it's awaited or when `.then()`, `.catch()`, or `.finally()` is called

reverse the arguments passed to a function.

Function name shim (especially for supporting function names in Internet Explorer).

Checks if the given value is a native function.

Markdown template helper. Uses remarkable to render markdown in templates. Should work with Handlebars, Lo-Dash or any template engine that supports helper functions.

Check if a string is a valid JavaScript identifier

FNV-1a non-cryptographic hash function

Make weak references to JavaScript Objects.

DJB2a non-cryptographic hash function

ESLint rules for functional programming

Run an array of functions in series, each passing its results to the next function (waterfall)

Get a list of function's argument variable names

Markdown template helper. Uses remarkable to render markdown in templates. Should work with Handlebars, Lo-Dash or any template engine that supports helper functions.

Determine if a function is an ES6 arrow function or not.

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

Executes a callback for each property found on a object, with options regarding enumerability (enumerable or non-enumerable) and ownership (inherited or only own properties). It excludes built-in properties from Object and Function prototypes by default,

Check if a value is a function

It's noop function. It does nothing.

Stringifies function's parameters definition

Fast and simple C FFI (foreign function interface) for Node.js

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.

the fastest version of Function#bind I could make

Executes a callback for each property found on a object, recursively on nested properties, with options regarding enumerability (enumerable or non-enumerable) and ownership (inherited or only own properties). It excludes built-in properties from Object an

Make an asynchronous function synchronous

commitlint plugin to use functions as rule value

JavaScript function overloading framework.

return a debounced function

Create a transform stream using await instead of callbacks

Mathematical expression evaluator fork with prototype pollution fix

Fast and simple way to parse code context for use with documentation from code comments. Parses context from a single line of JavaScript, for functions, variable declarations, methods, prototype properties, prototype methods etc.

Simple javascript lib for converting a [comma || space] delimited string to an array

Find how many values of a discrete periodic function are contained in an interval.

Lightweight logging library for any Node 10+ applications

Exponential function.

return a throttled function

Gamma function.

Find the nearest value of a discrete periodic function, given a point.

Compose an array of middleware into a single function for use in Express, Connect, router, etc.

Given a point and a distance, determine how many periodic values were skipped.

function try-catch wrapper for promises

Limit the execution rate of a function using the token bucket algorithm

Convert classes into factory functions so they can be called with or without new.

Replace text in files using strings, regexs or functions.

Call a module's exported functions directly from the command line, with arguments.

A module for sending responses from lambda-funciton backed custom resources in AWS CloudFormation

AWS Lambda mock context object

Natural exponential function.

Flex JWE Token Validator

Constant function.

Function parameter decorator transform plugin for babel v7, just like typescript.

Return a value or an evaluated function (with arguments).

Function.prototype.bind replacement that provides an `unbounded` hidden property on the returned bounded function, that contains the original unbounded function

Load helpers with patterns, as an object, key-value pair, or module.

Fast, generic JavaScript/node.js utility functions.

The gaussian (radial basis function) kernel

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

Round a double-precision floating-point number toward zero.

Check if function is an ES6 class.

Fork a stream into multiple streams

Currying in javascript. Like .bind() without also setting `this`.

A pipe function to perform function composition in LTR (Left To Right) direction.

Clones a function (creates wrapper function), with the same signature as source function

Flatten a function's argument. Like, really flatten

grab bag of easing equations

Complementary error function.

converts callback-based functions to Promises and apply currying to arguments

Calculate a scaled Lanczos sum for the approximation of the gamma function.

Evaluate bˣ - 1.

Natural logarithm of the gamma function.

because i get tired of typing EE.prototype.emit.bind.bind(EE.prototype.emit)

Incomplete gamma function.

Compute gamma(x+1) - 1.

Renames functions calls, but leaves function definitions unchanged.

Evaluate a factorial.

LaunchDarkly Server SDK for JavaScript - common Edge SDK code

Determine the best order for running async functions, and run them

Compute exp(x) - 1.

An implementation of the memoize technique

A safe callback to string serializer

Turn a callback-style function into a function that returns a promise

Function that returns an arbitrary `async function`, or undefined if `async function` syntax is unsupported.

Functional composition library

Make configurable canvas easily with Canvafy

Coerce props to custom values

Inverse complementary error function.

🦅 cli syntax highlighting: any function - any object - 176 languages

Validate and format function arguments ( handles types and optionals)

create a function that can only be invoked once

Functional multimethod library

Functional dispatch library

Error helpers library

Create javascript functions with optional, default and named paramaters.

Compute the binomial coefficient.

Compute the ratio of two gamma functions.

Select an attribute of an object based on semver versioning

Beta function.

When a function is not enough

Function that returns an arbitrary async generator function, or undefined if async generator syntax is unsupported.

Incomplete beta function.

Evaluate the signum function for a double-precision floating-point number.

Incomplete beta function and its first derivative.

Calculate the Lanczos sum for the approximation of the gamma function.

Extract function definitions from an array of GLSL tokens.

Inverse incomplete gamma function.

Evaluate ln(1+x) - x.

Function constructor.

determine if a function is a generator function

Get arguments of a function, useful for and used in dependency injectors. Works for regular functions, generator functions and arrow functions.

Get the argument names of a JavaScript function

Easily draw function graphs in text mode.

Determine a function's name.

Ensure a function is only called once. This is a fork of sindresorhus/onetime, but with CommonJS support.

use function as webpack loader option

Stand-in for a function

Rename a function

return a function composed of 2 or more functions

Make a function mimic another one. This is a fork of sindresorhus/mimic-fn, but with CommonJS support.

Utility library of AST helper functions

Detect native function name support.

Frequent default values

Inverse incomplete beta function.

Strips javascript code blocks out of README (or any other markdown) files and converts them into function objects.

Chained function calls

A toolkit for deep structure manipulations, provides deep merge/clone functionality out of the box, and exposes hooks and custom adapters for more control and greater flexibility.

A foreign function interface (FFI) for Node.js, N-API style

Get the hash of a string

Validate the type of arguments passed through the function.

Tap into a promise chain without affecting its value or state

Make weak references to JavaScript Objects.

Return a function which tests if every element in an array-like object passes a test condition.

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Parse function arguments. Useful to implement variadic functions.

ESLint rules for controlling where and how mutation is used.

Modulus function.

Wraps synchronous functions with a callback-style API

Creates a queue of sync or async functions with resolve and reject callback.

Instances of classes which are directly callable as functions.

Convert ES6 class constructor to normal function.

get a function's source

Sorting and matching utility using configurable string, glob, regular expression, and/or function matchers

Create a lazily evaluated value

Wraps a function so that it's only ever executed once.

Overloads a function. Makes parameters optional.

This is a tiny library for customizing components appearance

Pass a value through a pipeline of functions

Qualified Function. Wraps a function so it only gets executed if a condition is true.

This is a tiny library for customizing components appearance

Build and evaluate JavaScript strings safely via tagged template literals

Utility functions for Node.js and JavaScript

Gives a wrapper function the properties and string value of its underlying function.

Support the Bind Operator

Turns arrays and values into Filtering Functions.

A utility function to detect if a string should be wrapped in quotes to work as an object key

Possible Function. Wraps what might be a function, with fallback behavior in case it’s not. Perfect for use in functions that accept optional callback arguments.

Returns an object’s class and its ancestors.

An async/await module for sending responses from lambda-funciton backed custom resources in AWS CloudFormation

Utility functions for Web Extensions, manifest v2 and v3

Drops undefined arguments from the end of a function call.