@babel/plugin-transform-object-assign

What is @babel/plugin-transform-object-assign?

@babel/plugin-transform-object-assign is a Babel plugin that transforms ES6 Object.assign() calls into a more compatible form for older environments that do not support Object.assign(). This is particularly useful for ensuring code compatibility across different JavaScript environments.

What are @babel/plugin-transform-object-assign's main functionalities?

Transform Object.assign()

This feature transforms the ES6 Object.assign() method into a compatible form for older JavaScript environments. The code sample demonstrates how Object.assign() is used to merge properties from a source object into a target object.

const target = { a: 1 };
const source = { b: 2 };
const result = Object.assign(target, source);
console.log(result); // { a: 1, b: 2 }

Other packages similar to @babel/plugin-transform-object-assign

core-js

core-js is a modular standard library for JavaScript that includes polyfills for many ECMAScript features, including Object.assign(). It provides a more comprehensive solution compared to @babel/plugin-transform-object-assign, as it covers a wider range of polyfills.

lodash.assign

lodash.assign is a method from the Lodash library that performs a similar function to Object.assign(). It is part of the larger Lodash utility library, which offers a wide range of utility functions for JavaScript. Unlike @babel/plugin-transform-object-assign, lodash.assign is not a Babel plugin but a standalone utility function.

object-assign

object-assign is a standalone npm package that provides a polyfill for Object.assign(). It is a lightweight alternative to @babel/plugin-transform-object-assign and is useful for projects that need a simple polyfill without the overhead of a full Babel plugin.

README

@babel/plugin-transform-object-assign

Replace Object.assign with an inline helper. If you are authoring an application, rather than a library, it is recommended that you use the Object.assign polyfill instead.

Example

In

Object.assign(a, b);

Out

var _extends = ...;

_extends(a, b);

Caveats

• Will only work with code of the form Object.assign or Object['assign']. The following patterns are not supported:

  var { assign } = Object;
  var assign = Object.assign;
  

Installation

npm install --save-dev @babel/plugin-transform-object-assign

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["@babel/transform-object-assign"]
}

Via CLI

babel --plugins @babel/transform-object-assign script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["@babel/transform-object-assign"]
});