@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

See our website @babel/plugin-transform-object-assign for more information.

Install

Using npm:

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

or using yarn:

yarn add @babel/plugin-transform-object-assign --dev

Changelog

v7.25.9 (2024-10-22)

:bug: Bug Fix

• babel-parser, babel-template, babel-types
  • #16905 fix: Keep type annotations in syntacticPlaceholders mode (@liuxingbaoyu)
• babel-helper-compilation-targets, babel-preset-env
  • #16907 fix: support BROWSERSLIST{,_CONFIG} env (@JLHwung)
• Other
  • #16884 Analyze ClassAccessorProperty to prevent the no-undef rule (@victorenator)

:house: Internal

• babel-helper-transform-fixture-test-runner
  • #16914 remove test options flaky (@JLHwung)

:running_woman: Performance

• babel-parser, babel-types
  • #16918 perf: Make VISITOR_KEYS etc. faster to access (@liuxingbaoyu)