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@babel/preset-typescript

What changed in @babel/preset-typescript 8, from its official release notes, upgrade guides and advisories. Also covers @babel/plugin-transform-for-of. Sources checked 2026-10-27.

1 breaking2 deprecations1 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

@unstale/cli 0.2.8 on npm

@babel/preset-typescript 84 changes

Breaking changes 1

  • Importing internal files is disallowed; use the exported API only.

    8.0.0upgrade guide

Deprecations 2

  • The loose option still works in individual plugins but emits a warning pointing to the equivalent assumptions configuration.

    8.0.0upgrade guide

  • The spec option still works in individual plugins but emits a warning pointing to the equivalent assumptions configuration.

    8.0.0upgrade guide

Fixes and other changes 1