@babel/helper-get-function-arity

What is @babel/helper-get-function-arity?

The @babel/helper-get-function-arity package is a utility within the Babel compiler ecosystem. It is designed to help retrieve the arity (the number of arguments) of a function. This can be particularly useful when working with transformations and manipulations of JavaScript code, where understanding the function signature is necessary for generating or modifying code accurately.

What are @babel/helper-get-function-arity's main functionalities?

Get function arity

This feature allows developers to easily determine the number of parameters that a function expects. It is particularly useful in scenarios where code is being dynamically generated or modified, and the arity of functions needs to be preserved or analyzed.

const getFunctionArity = require('@babel/helper-get-function-arity');

function myFunction(a, b, c) {}

const arity = getFunctionArity(myFunction);
console.log(arity); // Outputs: 3

Other packages similar to @babel/helper-get-function-arity

arity-n

The 'arity-n' package allows users to create a function with a specified arity. While it serves a somewhat inverse purpose compared to @babel/helper-get-function-arity, it is related in the sense that both deal with the concept of function arity. 'arity-n' can be used to enforce a specific arity on functions, which could complement the arity analysis provided by @babel/helper-get-function-arity in certain code transformation scenarios.

README

@babel/helper-get-function-arity

Helper function to get function arity

See our website @babel/helper-get-function-arity for more information.

Install

Using npm:

npm install --save-dev @babel/helper-get-function-arity

or using yarn:

yarn add @babel/helper-get-function-arity --dev