@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining

What is @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining?

@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining is a Babel plugin designed to address a specific bug in V8 (the JavaScript engine used in Chrome and Node.js) related to the use of spread parameters within optional chaining expressions. This plugin ensures that code using these features behaves correctly across different environments.

What are @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining's main functionalities?

Fixing V8 Bug with Spread Parameters in Optional Chaining

This feature ensures that when using spread parameters within optional chaining, the code executes correctly. Without this plugin, certain versions of V8 might not handle this scenario properly, leading to unexpected behavior.

const obj = { foo: { bar: (...args) => args } };
const result = obj?.foo?.bar(1, 2, 3);
console.log(result); // [1, 2, 3]

Other packages similar to @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining

@babel/plugin-proposal-optional-chaining

This Babel plugin allows you to use the optional chaining operator in your code. While it doesn't specifically address the V8 bug with spread parameters, it enables the use of optional chaining syntax, which is a prerequisite for the functionality provided by @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining.

@babel/plugin-proposal-nullish-coalescing-operator

This Babel plugin enables the use of the nullish coalescing operator (??) in your code. Although it doesn't directly address the V8 bug with spread parameters, it often complements the use of optional chaining by providing a way to handle default values when dealing with null or undefined.

README

@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining

Transform optional chaining operators to workaround https://crbug.com/v8/11558

See our website @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining

or using yarn:

yarn add @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining --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)