babel-helper-get-function-arity

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

The babel-helper-get-function-arity package is a utility that helps determine the arity (number of parameters) of a given function. This can be particularly useful in scenarios where you need to introspect functions for metaprogramming or code transformation purposes.

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

Get Function Arity

This feature allows you to get the number of parameters of a function. In the code sample, a function declaration with two parameters ('a' and 'b') is created using Babel types, and the arity of the function is determined using the getFunctionArity utility.

const getFunctionArity = require('babel-helper-get-function-arity');
const t = require('@babel/types');

const func = t.functionDeclaration(
  t.identifier('myFunction'),
  [t.identifier('a'), t.identifier('b')],
  t.blockStatement([])
);

console.log(getFunctionArity(func)); // Output: 2

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README

babel-helper-get-function-arity

Usage

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