Sourced from @​babel/helpers's releases.

v7.27.1 (2025-04-30)

Thanks @​kermanx and @​woaitsAryan for your first PRs!

:eyeglasses: Spec Compliance

• babel-parser
  • #17254 Allow using of as lexical declaration within for (@​JLHwung)
  • #17230 Disallow get/set in TSPropertySignature (@​JLHwung)
• babel-parser, babel-types
  • #17193 Stricter TSImportType options parsing (@​JLHwung)

:bug: Bug Fix

• babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-traverse
  • #17137 fix: do expressions should allow early exit (@​kermanx)
• babel-helper-wrap-function, babel-plugin-transform-async-to-generator
  • #17251 Fix: propagate argument evaluation errors through async promise chain (@​magic-akari)
• babel-helper-remap-async-to-generator, babel-plugin-transform-async-to-generator
  • #17231 fix apply()/call() annotated as pure (@​Lacsw)
• babel-helper-fixtures, babel-parser
  • #17233 Create ChainExpression within TSInstantiationExpression (@​JLHwung)
• babel-generator, babel-parser
  • #17226 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 2) (@​JLHwung)
• babel-parser
  • #17224 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 1) (@​JLHwung)
  • #17080 Fix start of TSParameterProperty (@​JLHwung)
• babel-compat-data, babel-preset-env
  • #17228 Update firefox bugfix compat data (@​JLHwung)
• babel-traverse
  • #17156 fix: Objects and arrays with multiple references should not be evaluated (@​liuxingbaoyu)
• babel-generator
  • #17216 Fix: support const type parameter in generator (@​JLHwung)

:nail_care: Polish

• babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-decorators, babel-plugin-transform-arrow-functions, babel-plugin-transform-class-properties, babel-plugin-transform-destructuring, babel-plugin-transform-object-rest-spread, babel-plugin-transform-optional-chaining, babel-plugin-transform-parameters, babel-traverse
  • #17221 Reduce generated names size for the 10th-11th (@​nicolo-ribaudo)

:house: Internal

• babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  • #17263 Remove unused regenerator-runtime dep in @babel/runtime (@​nicolo-ribaudo)
• babel-compat-data, babel-preset-env
  • #17256 Tune plugin compat data (@​JLHwung)
• babel-compat-data, babel-standalone
  • #17236 migrate babel-compat-data build script to mjs (@​JLHwung)
• babel-register
  • #16844 Migrate @babel/register to cts (@​liuxingbaoyu)
• babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
  • #17205 Inline regenerator in the relevant packages (@​nicolo-ribaudo)
• All packages
  • #17207 Enforce node protocol import (@​JLHwung)

... (truncated)

Sourced from @​babel/helpers's changelog.

v7.27.1 (2025-04-30)

:eyeglasses: Spec Compliance

• babel-parser
  • #17254 Allow using of as lexical declaration within for (@​JLHwung)
  • #17230 Disallow get/set in TSPropertySignature (@​JLHwung)
• babel-parser, babel-types
  • #17193 Stricter TSImportType options parsing (@​JLHwung)

:bug: Bug Fix

• babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-traverse
  • #17137 fix: do expressions should allow early exit (@​kermanx)
• babel-helper-wrap-function, babel-plugin-transform-async-to-generator
  • #17251 Fix: propagate argument evaluation errors through async promise chain (@​magic-akari)
• babel-helper-remap-async-to-generator, babel-plugin-transform-async-to-generator
  • #17231 fix apply()/call() annotated as pure (@​Lacsw)
• babel-helper-fixtures, babel-parser
  • #17233 Create ChainExpression within TSInstantiationExpression (@​JLHwung)
• babel-generator, babel-parser
  • #17226 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 2) (@​JLHwung)
• babel-parser
  • #17224 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 1) (@​JLHwung)
  • #17080 Fix start of TSParameterProperty (@​JLHwung)
• babel-compat-data, babel-preset-env
  • #17228 Update firefox bugfix compat data (@​JLHwung)
• babel-traverse
  • #17156 fix: Objects and arrays with multiple references should not be evaluated (@​liuxingbaoyu)
• babel-generator
  • #17216 Fix: support const type parameter in generator (@​JLHwung)

:nail_care: Polish

• babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-decorators, babel-plugin-transform-arrow-functions, babel-plugin-transform-class-properties, babel-plugin-transform-destructuring, babel-plugin-transform-object-rest-spread, babel-plugin-transform-optional-chaining, babel-plugin-transform-parameters, babel-traverse
  • #17221 Reduce generated names size for the 10th-11th (@​nicolo-ribaudo)

:house: Internal

• babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  • #17263 Remove unused regenerator-runtime dep in @babel/runtime (@​nicolo-ribaudo)
• babel-compat-data, babel-preset-env
  • #17256 Tune plugin compat data (@​JLHwung)
• babel-compat-data, babel-standalone
  • #17236 migrate babel-compat-data build script to mjs (@​JLHwung)
• Other
  • #17232 Bump typescript-eslint to 8.29.1 (@​JLHwung)
  • #17219 test: add basic typescript-eslint integration tests (@​JLHwung)
  • #17205 Inline regenerator in the relevant packages (@​nicolo-ribaudo)
• babel-register
  • #16844 Migrate @babel/register to cts (@​liuxingbaoyu)
• babel-cli, babel-compat-data, babel-core, babel-generator, babel-helper-compilation-targets, babel-helper-fixtures, babel-helper-module-imports, babel-helper-module-transforms, babel-helper-plugin-test-runner, babel-helper-transform-fixture-test-runner, babel-helpers, babel-node, babel-parser, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd, babel-plugin-transform-react-display-name, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-plugin-transform-typeof-symbol, babel-plugin-transform-typescript, babel-preset-env, babel-register, babel-standalone, babel-types
  • #17207 Enforce node protocol import (@​JLHwung)
• babel-plugin-transform-regenerator

... (truncated)

• eebd3a0 v7.27.1
• b1f9184 Reduce interopRequireWildcard size (#16538)
• 9c351e5 Use class and add type definitions for regenerator (#17220)
• 0f95b74 Reduce regeneratorRuntime size (#17213)
• 317e332 Enforce node protocol import (#17207)
• 14ef1e9 Babel 8 cleanup (#17211)
• 97105cb Re-convert regeneratorRuntime to helper format (#17205)
• 1b93b0c Move regenerator files to the relevant packages (#17205)
• b953a8f Remove bundled regeneratorRuntime helper (#17205)
• 6874c25 Prepare LICENSE files for incorporating regenerator (#17205)
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