JSPM

Invoke function if is it callable and return result otherwise undefined

Extract names from functions

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

Call exports module from command line.

Module that helps you write generated functions in Node

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

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

accepts a function call as parameter to execute in gulp pipeline

check if an AST node is a function of some sort

Map `visit` over an array of objects.

Check whether a value is a generator or generator function

TypeScript implementation of debounce

Functions to create and call functions and evaluate expressions

Tiny function for spying on function calls.

Compose new functions f(g(x))

Sort the keys in an object.

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

Wraps a function with a function of a sertain arity.

Implementation of Function.prototype.bind

Universal Children Definition for React Components

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

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

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

Type checking for JavaScript functions

Get the path of the parent module

`Start a promise chain

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

Set the length of a function.

Define a lazily evaluated property on an object

Determine if a function is a native generator function.

Set a function's length property

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

Converts function to its source code.

Validates if a value is a function.

Memoize promise-returning & async functions

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

Checks if the given value is a native function.

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

Set a function's name property

Fork a stream in multiple directions according to a function

Check if something is a generator function

Determine if a function is a native async function.

OpenAI tokens calculator with function calls, images, and messages in one call

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

Create a promise that can be canceled

Check if function is an ES6 class.

A function that returns the normally hidden `AsyncFunction` constructor

Calls the passed function once in the passed interval.

Make a function mimic another one

JavaScript function overloading framework.

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

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

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

reverse the arguments passed to a function.

Get a list of function's argument variable names

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

Throttle a function to limit its execution rate

Get the path of the caller function

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

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

Get the callsite of the caller function

Isomorphic, functional type-checking for Javascript

It's noop function. It does nothing.

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

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

Automatically bind methods to their class instance

Fork a stream into multiple streams

grab bag of easing equations

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

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

Flatten a function's argument. Like, really flatten

Wrap a function without changing its name and other properties

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

Renames functions calls, but leaves function definitions unchanged.

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

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

AWS Lambda mock context object

Eslint plugin to control function call code style

Manage and call async functions

Takes an object of CommonJS module paths that export functions and returns an object of functions that call the module functions in a worker.

JSS plugin for function value and rule syntax

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

Stringifies function's parameters definition

Chained function calls

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

Run an array of functions in series

the fastest version of Function#bind I could make

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,

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

Capture and retrieve the last time a function was run

Check if function is an ES6 class.

Use the gray() color function in CSS

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

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

Make a synchronous function have a timeout

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

Debounce a function

Wrap mongodb node.js driver so it expose only two main function `query` and `transact`, so you can seperate pure function in domain business and side-effect (avoiding not dot notation call)

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.

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

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

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

Mathematical expression evaluator

Get the name of a named function

Wraps synchronous functions with a callback-style API

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

return a curried function

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

Get the argument names of a JavaScript function

Return a regular expression to capture a function name.

Test if a value is a function.

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

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

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

Fast, generic JavaScript/node.js utility functions.

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

Wrap a function to be able to call it with promises as arguments, i.e. use promises as if they where non-promise values

Function which does nothing.

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

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

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

OpenAI LLM function schema from OpenAPI (Swagger) document

Wraps synchronous functions with a cps (callback passing style) function

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

PostCSS plugin for exposing JavaScript functions

Returns an object’s class and its ancestors.

Validate and format function arguments ( handles types and optionals)

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

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

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

Fast kernel density estimation library

Easily draw function graphs in text mode.

Provides a list of reserved identifiers for JavaScript

Allows you to bannish some methods or functions.

Stand-in for a function

Make weak references to JavaScript Objects.

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

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

Simple, lazyily evaluated values.

FNV-1a non-cryptographic hash function

use function as webpack loader option

Check if a string is a valid JavaScript identifier

Retrieves parameter names from a function

DJB2a non-cryptographic hash function

ESLint rules for functional programming

Make weak references to JavaScript Objects.

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

🔨 Invokes 'fn1' until 'limit' is reached after that call 'fn2'

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

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Check if a value is a function

Parse function arguments. Useful to implement variadic functions.

Validate the type of arguments passed through the function.

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

Wraps JavaScript code within an immediately invoked function expression.

Instances of classes which are directly callable as functions.

worker-fn hides the complexity of communication between the JavaScript main thread and Worker threads, making it easy to call the functions defined in workers.

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.

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

commitlint plugin to use functions as rule value

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

return a debounced function

Make an asynchronous function synchronous

Create a transform stream using await instead of callbacks

Mathematical expression evaluator fork with prototype pollution fix

Overloads a function. Makes parameters optional.

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

Repeat function call depending on the previous call result and specified conditions.

Exponential function.

Lightweight logging library for any Node 10+ applications

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

return a throttled function

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

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Defines fallback behavior in case a variable is not a function. Perfect for optional callback parameters.

Gamma function.

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

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

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

Replace text in files using strings, regexs or functions.

A collection of utilities for JavaScript functions

Create a promise that can be canceled. This is a fork of sindresorhus/p-cancelable, but with CommonJS support.

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

Assert that a value is a function

PostCSS plugin to implement SASS color functions

one no-op function to rule them all

Function storage for Mongoose

Natural exponential function.

A small utility module that converts function arguments to an object for use within the function based on a supplied metadata object. This allows parameters to be passed in any order, making the resultant function very flexible.

stringify objects containing functions

Constant function.

Simple function call parser

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

Retrieves the argumentnames of a function

Flex JWE Token Validator

Parse an AWS Lambda function name into a name and a qualifier

a babel plugin for remove some function call

The gaussian (radial basis function) kernel

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

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

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

Create a promise that reports progress

Create a matching function from a glob pattern, regex, string, array, object or function.

Complementary error function.

gulp-fn - gulp plugin used in order to run custom callback functions per file

Evaluate bˣ - 1.

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

Natural logarithm of the gamma function.

◻️ Supreme nothingness

Incomplete gamma function.

Compute gamma(x+1) - 1.

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

Evaluate a factorial.

Async Function Queue

Compute exp(x) - 1.

React components for [Stripe.js and Elements](https://stripe.com/docs/stripe-js).

LaunchDarkly Server SDK for JavaScript - common Edge SDK code

An implementation of the memoize technique

Validate the api to your functions to help people use them correctly. This is pretty much React's propTypes without React.

Provides an object similar to Function Runtime's context for use in unit testing

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A safe callback to string serializer

Functional multimethod library

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

Functional composition library

Make configurable canvas easily with Canvafy

Functional dispatch library

Coerce props to custom values

Error helpers library

Inverse complementary error function.

A wrapper for AWS's [Step Functions Local](https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html).

Have your arguments, and validate it too. -- Slick arguments validator for all your js functions.

Compute the binomial coefficient.

Compute the ratio of two gamma functions.

A foreign function interface (FFI) for Node.js

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

Create javascript functions with optional, default and named paramaters.

Beta function.

create a function that can only be invoked once

Select an attribute of an object based on semver versioning

Natural exponential function.

A simple javascript utility for function binding memoization.

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

Incomplete beta function.

When a function is not enough

Incomplete beta function and its first derivative.

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