Fn Packages

Ensure a function is only called once

Make a function mimic another one

Check if something is a generator function

Get the name of a named function

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

Debounce a function

Checks if the given value is a native function.

Converts function to its source code.

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

Check if a value is a function

Wraps synchronous functions with a callback-style API

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.

Functionally - A utility belt for functional JavaScript

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

Rename a function

Take an (a)sync function result and pass it forward.

Invoke function if is it callable and return result otherwise undefined

Define a lazily evaluated property on an object

Check if something is an ES7 async function