@babel/plugin-proposal-throw-expressions

What is @babel/plugin-proposal-throw-expressions?

@babel/plugin-proposal-throw-expressions is a Babel plugin that allows you to use throw expressions in your JavaScript code. This proposal introduces the ability to throw exceptions directly within expressions, making it easier to handle errors in a more concise and expressive manner.

What are @babel/plugin-proposal-throw-expressions's main functionalities?

Throw expressions in conditional (ternary) operators

This feature allows you to throw an error directly within a ternary operator, making it easier to handle invalid conditions without needing additional if-else statements.

const value = condition ? 'valid' : throw new Error('Invalid condition');

Throw expressions in logical operators

This feature allows you to throw an error directly within logical operators like || and &&, providing a more concise way to enforce required values or conditions.

const value = someValue || throw new Error('someValue is required');

Other packages similar to @babel/plugin-proposal-throw-expressions

babel-plugin-syntax-throw-expressions

This package provides the syntax support for throw expressions but does not transform the code. It is useful if you want to use throw expressions in your code but handle the transformation separately.

babel-plugin-transform-throw-expressions

This package transforms throw expressions into equivalent code that can be executed in environments that do not support the syntax natively. It is similar to @babel/plugin-proposal-throw-expressions but focuses on transforming the code for compatibility.

README

@babel/plugin-proposal-throw-expressions

Wraps Throw Expressions in an IIFE

See our website @babel/plugin-proposal-throw-expressions for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-proposal-throw-expressions

or using yarn:

yarn add @babel/plugin-proposal-throw-expressions --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)