v12.0.0

12.0.0 (2025-09-23)

Bug Fixes

• legacy: forbid JSX syntax outside of JSX/TSX files (172074c)
• legacy: stop TS support from breaking non-TS projects (b2c62b2)
• legacy: use TS rules where possible (335ccb8)
• replace config with defineConfig (3b2c7bd)
• use @stylistic/indent to work around ts/eslint bug (63a0d62), closes typescript-eslint/typescript-eslint#11455

Features

• add minimal TS support to legacy rule sets (2b4d83e)

BREAKING CHANGES

• legacy: TS rules are no longer active in non-TS files unless
  explicitly added through the user's configuration
• this rule seems to handle a few cases differently.
• legacy: JSX use outside of JSX/TSX files is now forbidden
• legacy: TS rules are now active even in non-TS files
• while defineConfig is almost the same as config,
  there are some cases that differ. See:
  https://typescript-eslint.io/packages/typescript-eslint/#migrating-to-defineconfig