@babel/helper-wrap-function

What is @babel/helper-wrap-function?

The @babel/helper-wrap-function package is a utility within the Babel ecosystem designed to assist in wrapping functions. This package is particularly useful when transforming code during the build process, allowing developers to modify function behavior or inject additional functionality seamlessly.

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

Function Wrapping

This feature allows developers to wrap any given function with additional behavior. In the provided code sample, the original function is wrapped to include a console log statement that outputs the arguments with which the function is called.

import wrapFunction from '@babel/helper-wrap-function';

const myFunction = function (a, b) {
  return a + b;
};

const wrappedFunction = wrapFunction(myFunction, function (fn, args, context) {
  console.log('Function is called with arguments:', args);
  return fn.apply(context, args);
});

wrappedFunction(1, 2);

Other packages similar to @babel/helper-wrap-function

lodash.wrap

Lodash provides a utility method 'wrap' which serves a similar purpose to @babel/helper-wrap-function. It allows you to wrap a function with a custom wrapper, enabling you to modify arguments, outputs, or behavior. Compared to @babel/helper-wrap-function, lodash.wrap is part of a larger utility library and may be preferred for projects that already use Lodash for other utilities.

core-decorators

The core-decorators package offers a variety of decorators for class properties and methods. While not a direct analog to function wrapping, decorators can be used to achieve similar outcomes in terms of modifying or enhancing function behavior. This package is more suited for use with ES6 classes and may offer a more declarative approach compared to @babel/helper-wrap-function.

README

@babel/helper-wrap-function

This helper wraps a function within a call expression. It works with any function: statements, expressions and methods; both named and anonymous.

Example

In

(function () {
}());

Out

_wrapper(function () {
})();

Usage

import wrapFunction from "@babel/helper-wrap-function";

wrapFunction(nodePathOfTheFunction, nodeWhichReferencesToTheWrapper);