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@babel/helper-get-function-arity
Advanced tools
Package description
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.
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
Similar to @babel/helper-get-function-arity, the 'func-arity' package is designed to return the arity of a given function. However, 'func-arity' focuses solely on this functionality without being tied to the Babel ecosystem, making it a more lightweight choice for projects not using Babel.
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
Function that returns the number of arguments that a function takes.
import getFunctionArity from "@babel/helper-get-function-arity";
function wrap(state, method, id, scope) {
// ...
if (!t.isFunction(method)) {
return false;
}
const argumentsLength = getFunctionArity(method);
// ...
}
FAQs
Helper function to get function arity
The npm package @babel/helper-get-function-arity receives a total of 4,803,110 weekly downloads. As such, @babel/helper-get-function-arity popularity was classified as popular.
We found that @babel/helper-get-function-arity demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 6 open source maintainers collaborating on the project.
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