@babel/plugin-transform-optional-catch-binding

What is @babel/plugin-transform-optional-catch-binding?

The @babel/plugin-transform-optional-catch-binding package is a Babel plugin that allows developers to use optional catch bindings in their JavaScript code. This feature is part of the ECMAScript 2019 (ES10) specification and enables developers to use try/catch blocks without the need to specify a catch binding if the error object is not used in the catch block.

What are @babel/plugin-transform-optional-catch-binding's main functionalities?

Optional Catch Binding Transformation

This feature transforms optional catch bindings to be compatible with environments that do not support this ES2019 syntax. It removes the need for an unused error binding in catch blocks.

try {
  // some code that might throw
} catch {
  // handle the error without using the error object
}

Other packages similar to @babel/plugin-transform-optional-catch-binding

@babel/plugin-transform-block-scoping

This package transforms ES2015 block scoping (let and const) to ES5. It is similar in the sense that it also transforms newer JavaScript syntax to be compatible with older environments, but it focuses on variable declarations rather than catch bindings.

@babel/plugin-transform-parameters

This package transforms ES2015 default, rest, and destructured parameters to ES5. Like @babel/plugin-transform-optional-catch-binding, it deals with transforming modern JavaScript features to ensure compatibility with older JavaScript engines, but it focuses on function parameters instead of error handling.

@babel/plugin-proposal-optional-chaining

This package allows the transformation of the optional chaining syntax (?.) which is a feature proposed for JavaScript. It is similar to @babel/plugin-transform-optional-catch-binding in that it deals with optional syntax features, but it focuses on property access rather than error handling.

README

@babel/plugin-transform-optional-catch-binding

Compile optional catch bindings

See our website @babel/plugin-transform-optional-catch-binding for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-transform-optional-catch-binding

or using yarn:

yarn add @babel/plugin-transform-optional-catch-binding --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)